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Bibliography on: CRISPR-Cas

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Robert J. Robbins is a biologist, an educator, a science administrator, a publisher, an information technologist, and an IT leader and manager who specializes in advancing biomedical knowledge and supporting education through the application of information technology. More About:  RJR | OUR TEAM | OUR SERVICES | THIS WEBSITE

RJR: Recommended Bibliography 05 Nov 2025 at 01:45 Created: 

CRISPR-Cas

Clustered regularly interspaced short palindromic repeats (CRISPR, pronounced crisper) are segments of prokaryotic DNA containing short repetitions of base sequences. Each repetition is followed by short segments of "spacer DNA" from previous exposures to foreign DNA (e.g a virus or plasmid). The CRISPR/Cas system is a prokaryotic immune system that confers resistance to foreign genetic elements such as those present within plasmids and phages, and provides a form of acquired immunity. CRISPR associated proteins (Cas) use the CRISPR spacers to recognize and cut these exogenous genetic elements in a manner analogous to RNA interference in eukaryotic organisms. CRISPRs are found in approximately 40% of sequenced bacterial genomes and 90% of sequenced archaea. By delivering the Cas9 nuclease complexed with a synthetic guide RNA (gRNA) into a cell, the cell's genome can be cut at a desired location, allowing existing genes to be removed and/or new ones added. The Cas9-gRNA complex corresponds with the CAS III crRNA complex in the above diagram. CRISPR/Cas genome editing techniques have many potential applications, including altering the germline of humans, animals, and food crops. The use of CRISPR Cas9-gRNA complex for genome editing was the AAAS's choice for breakthrough of the year in 2015.

Created with PubMed® Query: ( "CRISPR.CAS" OR "crispr/cas" ) NOT pmcbook NOT ispreviousversion

Citations The Papers (from PubMed®)

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RevDate: 2025-11-03
CmpDate: 2025-11-03

Abir AH, Benz J, Frey B, et al (2026)

Glycolytic flux sustains human Th1 identity and effector function via STAT1 glycosylation.

Life science alliance, 9(1): pii:9/1/e202503315.

T helper (Th) cell lineages are linked to metabolism, but precise mechanisms in human Th1 cells remain unclear. We addressed this question by in vitro stimulation and CRISPR/Cas9-mediated gene editing. Metabolic profiling revealed enhanced glycolytic activity in Th1 versus non-polarized cells, evidenced by increased extracellular acidification rate, ATP production via glycolysis, lactate secretion, NADH abundance, and elevated glycolysis-dependent anabolic activity. Inhibition of glycolysis reduced IFNγ production and STAT1 phosphorylation independent of JAK1/2 or SHP2 activity and STAT1 abundance, implicating glycolysis directly in sustaining STAT1-mediated Th1 functionality. O-glycosylation of STAT1 via O-glycosyltransferase was pivotal in modulating STAT1 activity. Pharmaceutical O-glycosyltransfer-ase inhibition prevented Th1 differentiation as well as STAT1 O-glycosylation. CRISPR/Cas9 mediated mutation of the O-glycosylation Ser499 and Thr510 sites diminished STAT1 Ser727 phosphorylation and IFNγ synthesis. Together, this study highlights glycolysis as key regulator of human Th1 cell identity and effector function, with STAT1 O-glycosylation selectively maintaining Th1 effector capacity. This mechanism could be explored to safeguard Th1 cells.

RevDate: 2025-11-03

Chen H, Zeng Z, Wei Y, et al (2025)

Dynamic biosensing enables amplifier-collateral-cleavage enhancement for pathogen diagnostic.

Biosensors & bioelectronics, 293:118158 pii:S0956-5663(25)01035-8 [Epub ahead of print].

While CRISPR-Cas system and dynamic DNA nanotechnology have been extensively applied to mainstream biomedical domains, including gene editing, biochemical analysis, and molecular imaging-current approaches remain constrained by limitations in addressing increasingly nuanced and specialized experimental scenarios. Here, we report that CRISPR-CasΦ possesses a unique collateral-cleavage blockade characteristic: CasΦ is unable to recognize the "TTN" sequence in the loop region at the 3' end of stem-loop DNA, resulting in the blockade of collateral-cleavage activity. Leveraging this discovery, we successfully designed and customized two back-end signal amplifiers for biosensing by integrating dynamic DNA sensing studies of CasΦ. Based on these two specialized stem-loop amplifiers, we further developed the Amplifier-collateral-cleavage enhancement (ACE) method, achieving exponential signal amplification. Clinical validation using 112 urine samples demonstrated that ACE exhibits 98.8 % sensitivity and 90 % specificity. These findings highlight the potential of CasΦ dynamic sensing and establish a bridge for future integration of dynamic DNA technology and CRISPR systems.

RevDate: 2025-11-04
CmpDate: 2025-11-04

Su F, Zhang H, Ren C, et al (2025)

MnO2@Mn3O4 Heterojunction as a Coreactant Catalyst Collaborated with T-Shaped DNA Cycling-CRISPR/Cas12a Cascade Amplification for Locus-Specific N6-Methyladenosine RNA Modification Detection.

Analytical chemistry, 97(43):24165-24175.

As the predominant RNA modification, N6-methyladenosine (m[6]A) is recognized to play pivotal regulatory roles in fundamental cellular functions and oncogenic processes. However, the precise analysis of site-specific m[6]A modifications continues to present significant challenges. In this work, a unique electrochemiluminescence (ECL) biosensor for the locus-specific detection of m[6]A in RNA was developed in the first utilization of a MnO2@Mn3O4 heterojunction as a coreaction catalyst in collaboration with a T-shaped DNA cycling-CRISPR/Cas12a cascade amplification strategy. The MnO2@Mn3O4 heterojunction was observed to significantly enhance coreactant catalytic activity, yielding a 7.3-fold increase in the ECL intensity of the gold nanoparticles (AuNPs)/MnO2@Mn3O4/(2,2'-bipyridine) dichlororuthenium(II) (Ru(bpy)3[2+])/Nafion/GCE compared to the AuNPs/Ru(bpy)3[2+]/Nafion/GCE. Sequentially, the T-shaped DNA cycling amplification strategy effectively converted the target m[6]A RNA into an amplified biosignal, further enhanced by a CRISPR/Cas12a signal amplification system mediated by framework nucleic acid (FNA)-based photocontrollable nucleic acid protection, ensuring the sensitivity and specificity of m[6]A RNA. The integration of the triple signal amplification strategy achieved detection limits as low as 0.05 pM (S/N = 3) for a linearity spanning from 100 fM to 100 nM. The proposed ECL biosensor has been applied in detecting site-specific m[6]A modifications in total real RNA samples extracted from HeLa cells, demonstrating its promising applications for clinical diagnosis.

RevDate: 2025-11-04
CmpDate: 2025-11-04

Ma AX, Zhang Q, Zhang MY, et al (2025)

One-step naked-eye fluorescence detection of viruses using quantum dot-magnetic beads coupled with CRISPR/Cas12a.

Chemical communications (Cambridge, England), 61(89):17432-17435.

This work constructs quantum dot-magnetic beads coupled with CRISPR/Cas12a for naked-eye detection of herpes simplex virus. The system integrates the high brightness of quantum dots and trans-cleavage activity of Cas12a, enabling rapid, simple, and accurate viral detection.

RevDate: 2025-11-04
CmpDate: 2025-11-04

Wei D, Cheng P, Song Z, et al (2025)

AI-guided Cas9 engineering provides an effective strategy to enhance base editing.

Molecular systems biology, 21(11):1563-1580.

Precise genome editing is crucial for functional studies and therapies. Base editors, while powerful, require optimization for efficiency. Meanwhile, emerging protein design methods and protein language models have driven efficient and intelligent protein engineering. In this study, we employed the Protein Mutational Effect Predictor (ProMEP) to predict the effects of single-site saturated mutations in Cas9 protein, using AncBE4max as the prototype to construct and test 18 candidate point mutations. Based on this, we further predicted combinations of multiple mutations and successfully developed a high-performance variant AncBE4max-AI-8.3, achieving a 2-3-fold increase in average editing efficiency. Introducing the engineered Cas9 into CGBE, YEE-BE4max, ABE-max, and ABE-8e improved their editing performance. The same strategy also substantially improves the efficiencies of HF-BEs. Stable enhancement in editing efficiency was also observed across seven cancer cell lines and human embryonic stem cells. In conclusion, we validated that AI models can serve as more effective protein engineering tools, providing a universal improvement strategy for a series of gene editing tools.

RevDate: 2025-11-04
CmpDate: 2025-11-04

Tian L, Gao Y, Lu Y, et al (2025)

Modular RCA-CRISPR/Cas12a amplification on a multi-volume SlipChip for ultrafast, single-copy quantification of circRNA and miRNA in ovarian cancer.

Lab on a chip, 25(22):5762-5776.

The aberrant expression of RNAs in ovarian cancer (OC) progression highlights their potential as clinical biomarkers. However, rapid and accurate quantification of these RNAs in biosamples remains a significant challenge. In this study, we develop a modular isothermal rolling circle amplification (RCA)-activated Cas12a loop-enhanced (MIRACLE) amplification method for circRNA and miRNA quantification without the need of reverse transcription. In this design, isothermal amplification of modular DNA can be initiated by target-specific RCA primers or miRNAs, with the amplification products subsequently recognized by the Cas12a system to generate measurable signals. When integrated with a multi-volume sliding chip (SlipChip) platform, this MIRACLE method enables portable, rapid and ultra-sensitive quantification of these two types of RNA. Under optimized conditions, this platform exhibits detection limits of 0.125 copies per μL for circRNA and 0.326 copies per μL for miRNA, covering a 5-log dynamic range from 10[-1] to 10[3] copies per μL within 35 min. The platform was validated using OC cell lines and clinical blood samples. It successfully profiled OC RNA biomarkers (hsa_circ_0049101 and hsa-miR-338-3p) and effectively distinguished between early and advanced stages of OC. These results show a strong correlation with RT-qPCR (R[2] = 0.953 for circRNA and R[2] = 0.947 for miRNA). This work establishes a versatile CRISPR-microfluidic platform for cancer diagnosis. Its modular design allows for adaptation to detect other cancer-related RNA biomarkers, thereby addressing critical needs in precision oncology.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Keuthen H, Pozhydaieva N, K Höfer (2025)

Precise Phage Mutagenesis with NgTET-Assisted CRISPR-Cas Systems.

Journal of visualized experiments : JoVE.

Bacteriophages, viruses that specifically target their bacterial hosts, hold significant potential for biotechnology and medicine, especially in combating multidrug-resistant infections. However, the molecular mechanisms underlying phage infection remain largely underexplored. Precise, site-specific mutagenesis of phages is a powerful tool to elucidate gene functions and phage-host interactions. However, a major challenge in phage genome mutagenesis is the presence of phage DNA modifications that interfere with conventional genome editing tools like CRISPR-Cas. While CRISPR-Cas systems have been used successfully for targeted mutagenesis in various organisms, their effectiveness in phage mutagenesis is often limited by DNA modifications such as cytosine glycosylation. To overcome this barrier, we developed an efficient method that temporarily reduces the abundance of phage DNA modifications, enabling efficient CRISPR-Cas targeting and precise mutation introduction into phage genomes. Specifically, we use the Ten Eleven Translocation (TET) methylcytosine dioxygenase from Naegleria gruberi (NgTET), which iteratively demodifies methylated and hydroxymethylated cytosines in DNA. By oxidizing hydroxymethylated cytosines within phage DNA, NgTET prevents subsequent cytosine modification like glycosylation and significantly enhances the efficiency of Cas-mediated DNA cleavage. In conclusion, the scarless and precise genome-editing approach presented here enables the efficient introduction of point mutations while maintaining the native gene architecture in phage genomes. By preserving intact transcriptional and translational frameworks, this method minimizes unintended disruptions to complex regulatory networks. This is particularly important for investigating essential or multifunctional phage proteins. The ability to generate targeted genetic modifications without introducing extraneous sequences significantly expands the experimental toolkit for phage biology. This strategy not only facilitates detailed functional studies but also enhances the potential for rational engineering of phages for therapeutic and biotechnological applications.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Pantoja-Alonso MA, Camas-Reyes JA, Cano-Segura R, et al (2025)

A comprehensive review of genomic-scale genetic engineering as a strategy to improve bacterial productivity.

Microbiology (Reading, England), 171(11):.

Bacterial genome engineering has evolved to provide increasingly precise, robust and rapid tools, driving the development and optimization of bacterial production of numerous compounds. The field has progressed from early random mutagenesis methods, labour-intensive and inefficient, to rational and multiplexed strategies enabled by advances in genomics and synthetic biology. Among these tools, CRISPR/Cas has stood out for its versatility and its ability to achieve precision levels ranging from 50% to 90%, compared to the 10-40% obtained with earlier techniques, thereby enabling remarkable improvements in bacterial productivity. Nevertheless, like its predecessors, it still demands continuous refinement to reach full maturity. In this context, the present review addresses the lack of a unified overview by summarizing historical milestones and practical applications of genomic engineering tools in bacteria. It integrates diverse approaches to provide a comprehensive perspective on the evolution and prospects of these fundamental biotechnological tools.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Lamb CH, Riesle-Sbarbaro S, Prescott JB, et al (2025)

Amplification-free detection of zoonotic viruses using Cas13 and multiple CRISPR RNAs.

The Journal of general virology, 106(11):.

Zoonotic viruses such as hantaviruses and influenza A viruses present a threat to humans and livestock. There is thus a need for methods that are rapid, sensitive and relatively cheap to detect infections with these pathogens early. Here, we use an amplification-free clustered regularly interspaced short palindromic repeats-associated protein 13 (CRISPR-Cas13)-based assay, which is simple, cheap and field-deployable, to detect the presence or absence of genomic hantavirus or influenza A virus RNA. In addition, we evaluate whether the use of multiple CRISPR RNAs (crRNAs) can improve the sensitivity of this amplification-free method. We demonstrate that for the hantaviruses Tula virus (TULV) and Andes virus (ANDV), a combination of two or three crRNAs provides the best sensitivity for detecting viral RNA, whereas for influenza virus RNA detection, additional crRNAs provide no consistent benefit. We also show that the amplification-free method can be used to detect TULV and ANDV RNA in tissue culture infection samples, ANDV from hamster lung samples and influenza A virus RNA in clinical nasopharyngeal swabs. In clinical samples, the Cas13 assay has an 85% agreement with RT-qPCR for identifying a positive sample. Overall, these findings indicate that amplification-free CRISPR-Cas13 detection of viral RNA has potential as a tool for rapidly detecting zoonotic virus infections.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Chiurillo MA, Ahmed M, González C, et al (2026)

Cloning-Free Genome Editing by CRISPR/T7RNAP/Cas9 in Trypanosoma cruzi.

Methods in molecular biology (Clifton, N.J.), 2982:59-76.

The genetic manipulation of the human parasite Trypanosoma cruzi has been significantly improved since the implementation of the CRISPR/Cas9 technology for genome editing in this organism. Initially, the system was successfully used for gene knockout and endogenous C-terminal tagging in T. cruzi. Recently, an updated version of this technology has been used for gene complementation, site-directed mutagenesis, and N-terminal tagging in trypanosomatids. This cloning-free strategy, called CRISPR/T7RNAP/Cas9, is extremely useful for identifying essential genes when null mutants are not viable. Mutant cell lines obtained by this new system have been used for the functional characterization of proteins in different developmental stages of this parasite's life cycle, including infective trypomastigotes and intracellular amastigotes. In this chapter, we describe the methodology to achieve genome editing by CRISPR/T7RNAP/Cas9 in T. cruzi. Our method involves the generation of T. cruzi epimastigotes that constitutively express the T7 RNA polymerase (T7RNAP) and SpCas9, and their co-transfection with an sgRNA template and donor DNA(s) as polymerase chain reaction (PCR) products. Using this strategy, we have generated genetically modified parasites in 2-3 weeks without the need for gene cloning, cell sorting, or having to perform several transfection attempts to verify the sgRNA efficiency for targeting the gene of interest. The methodology has been organized according to three main genetic purposes: gene knockout, gene complementation of knockout cell lines, and endogenous (N- or C-terminal) tagging in T. cruzi.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Ashworth KE, Zhang J, D'Amata C, et al (2025)

USH2A-Mutated Human Retinal Organoids Model Rod-Cone Dystrophy.

Investigative ophthalmology & visual science, 66(14):2.

PURPOSE: USH2A mutations are the leading cause of autosomal recessive retinitis pigmentosa (RP), a progressive blinding disease marked by photoreceptor degeneration. Animal models fail to recapitulate the features of USH2A RP seen in humans, and its earliest pathogenic events remain unknown. Here, we established a human model of USH2A RP using retinal organoids derived from patient induced pluripotent stem cells and CRISPR-Cas9-engineered isogenic-USH2A-/- induced pluripotent stem cells.

METHODS: We assessed organoids for cellular, molecular, and morphological defects using serial live imaging and whole organoid and fixed section analyses.

RESULTS: Both patient-derived and isogenic-USH2A-/- organoids showed preferential rod photoreceptor loss followed by widespread degeneration, consistent with the clinical phenotype. Additionally, isogenic-USH2A-/- organoids showed early defects in proliferation and structure.

CONCLUSIONS: Our findings suggest that molecular changes precede overt photoreceptor loss in USH2A RP, and pathogenesis may begin before clinical symptoms emerge. By defining early and late disease features, we provide new insight on the developmental origins of USH2A RP to guide therapeutic strategies.

RevDate: 2025-11-03

Avaro AS, JG Santiago (2025)

Engineering guidelines for CRISPR diagnostics.

Chemical communications (Cambridge, England) [Epub ahead of print].

This Feature Article reviews engineering guidelines for the design of CRISPR assays, including experimentally validated theoretical models and recommendations for experimental research practice and reporting. First, the state of the art of CRISPR kinetics studies is reviewed. Then presented is a summary of the existence and persistence of widespread gross errors in reports of kinetic rate constants of CRISPR-Cas enzymes, as well as the fact that many CRISPR studies provide insufficient data to check for consistency or assess calibration. Proper experimental procedures including signal calibration are critical to the assessment, design, and future development of CRISPR kinetics assays and CRISPR diagnostics. This review then presents guidelines for the calibration of fluorescence-based CRISPR assays. Fluorescence is the most common detection modality, and incorrect calibration is implicated in high-profile, gross errors in the field. Also presented is a review of enzymatic kinetic rates and reporter molecule degradation as the major factor limiting CRISPR assay sensitivity. Lastly, progress in, and criticism of, microfluidic applications of CRISPR assays is summarized.

RevDate: 2025-11-03

Leung CY, Wimmer EA, HMM Ahmed (2025)

Synthetic biology approaches to generate temperature-sensitive alleles for the Sterile Insect Technique.

Insect science [Epub ahead of print].

The Sterile Insect Technique (SIT) is an environmentally friendly, sustainable pest control approach, which uses large-scale releases of sterile insects to suppress or eradicate target populations through infertile matings. The efficiency of SIT is enhanced by male-only releases requiring genetic sexing strains (GSSs) that are classically based on selectable recessive visible markers or temperature-sensitive lethal (tsl) mutations and a rescue by a wild-type allele translocated to the male-determining chromosome. The transfer of identified or designed temperature-sensitive alleles might allow the generation of neoclassical GSSs in additional SIT target species. By using precise genome-editing tools, such as CRISPR/Cas, the creation of specific mutations in target genes and the integration of a wild-type copy is feasible without the introduction of foreign DNA. This might ease regulation of neoclassical GSSs, since they are not considered transgenic. However, integration and expression of genes at male-determining loci or chromosomes is not reliably established. Therefore, additional strategies to link temperature-sensitive phenotypes to female development are required, which could be achieved by targeting genes involved in dosage compensation or sex determination. To create temperature-sensitive alleles, rational protein design using advanced modeling and prediction tools to evaluate and tailor the effect of mutations on protein stability and temperature sensitivity can be used. In addition, emerging synthetic biology strategies such as temperature-inducible N-degrons or temperature-sensitive inteins provide powerful tools to generate temperature sensitivity. Such approaches should enable conditional control over proteins causing female lethality or sex conversion and therefore promise straightforward generic approaches to generate GSSs for male-only production in SIT target species.

RevDate: 2025-11-02

Rahimian M, B Panahi (2025)

Genomic insights into Erwinia amylovora prophages: Diversity, defense strategies, and phage-host coevolution.

Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases pii:S1567-1348(25)00135-2 [Epub ahead of print].

Erwinia amylovora, the causative agent of fire blight in Rosaceae plants like apple and pear, is a major agricultural pathogen responsible for significant economic losses. This gram-negative phytopathogen has the potential to acquire antibiotic resistance and virulence genes, a situation that becomes more severe and restricts treatment options. Using an in silico approach, we analyzed 268 E. amylovora genomes and identified seven high-quality temperate prophages, all classified under Caudoviricetes, with average genome sizes of 44.2 kbp and 51 % GC content. These prophages exhibited unique genomic features, including tRNA genes (Ph-Ea644), anti-defense systems like ardc (Ph-Ea6-96), and regulatory/lysis genes (Ph-EaFC01). Comparative genomics and phylogenetic analyses grouped them into five clades, with Ph-Ea4-96, Ph-Ea3-97, and Ph-Ea2-97 being genetically identical. Functional annotation revealed streptomycin resistance genes and a CAZyme (GH23) in Ph-Ea7-3, virulence factors (e.g., alginate biosynthesis proteins), and six auxiliary metabolic genes (AMGs) linked to metabolic adaptation. Additionally, Ph-Ea644 encoded a cell wall-binding receptor protein. The prophages also carried defense systems (Gabija, CBASS) and 31 anti-CRISPR proteins (ACRs), suggesting evasion of host immunity. CRISPR-Cas analysis indicated fewer arrays and spacers in prophage-containing strains, underscoring CRISPR's role in lysogeny resistance. These findings highlight the genomic plasticity of E. amylovora prophages, their interactions with bacterial defenses, and their potential influence on pathogen evolution. This study enhances understanding of temperate phages in agricultural pathogens and underscores challenges in phage-based biocontrol strategies.

RevDate: 2025-11-02

Bacci L, Pollutri D, Ripa IJ, et al (2025)

Ribosomal protein L5 (RPL5/uL18) I60V mutation is associated to increased translation and modulates drug sensitivity in T-cell acute lymphoblastic leukemia cells.

Biochemical pharmacology pii:S0006-2952(25)00762-2 [Epub ahead of print].

Somatic mutations in ribosomal proteins (RPs), including RPL5, have been reported in approximately 10 % of pediatric patients with T-cell acute lymphoblastic leukemia (T-ALL). In cancer, the incorporation of mutant RPs into ribosomes often disrupts canonical ribosome function, thereby contributing to disease development. In this study, we aimed to characterize the effects of the RPL5-I60V mutation in the context of T-ALL, focusing on its impact on translation and cellular responses to a panel of compounds in vitro. Using CRISPR-Cas9, we generated a homozygous knock-in mutant in Jurkat cells and investigated its effects on ribosome biogenesis. We observed both quantitative and qualitative alterations in the production of the large ribosomal subunit. Ribosomes containing the mutant RPL5 protein exhibited intrinsically increased protein synthesis activity, which correlated with enhanced cellular proliferation. We then evaluated the response of these mutant cells to a panel of compounds targeting protein synthesis at various levels-including an MNK1 inhibitor, metformin, silvestrol, homoharringtonine, anisomycin, resveratrol, and hygromycin B-as well as cytarabine, a chemotherapeutic agent commonly used in T-ALL treatment. Our results showed that the RPL5-I60V mutation confers increased sensitivity to most of these compounds, with the exception of hygromycin B. This study advances our understanding of how oncoribosomes contribute to cancer pathogenesis and highlights the therapeutic potential of directly or indirectly targeting altered ribosomes, offering insights for the development of personalized treatment strategies.

RevDate: 2025-11-02

Lankireddy SV, Lekkala S, Khadgi A, et al (2025)

Molecular biology of Cotton Leafroll Dwarf Virus (CLRDV) and potential application of CRISPR-Cas technology for developing virus-resistant cotton.

Virology, 614:110730 pii:S0042-6822(25)00344-7 [Epub ahead of print].

Cotton leafroll dwarf virus (CLRDV) poses an increasing threat to global cotton production. Transmitted by the cotton aphid (Aphis gossypii) in a persistent, circulative manner, CLRDV exhibits a wide geographical distribution, with documented presence in South America, Africa, Asia, and the USA. Infection can result in either cotton blue disease (CBD) in South America or cotton leafroll dwarf disease (CLRDD) in the USA, both of which are associated with CLRDV. The considerable genetic diversity and frequent recombination events within CLRDV populations contribute to this symptom variability and complicate both diagnosis and management. While resistant cultivars have reduced disease impact in South America, these lines remain susceptible to emerging US strains, underscoring the urgent need for region-specific resistance breeding. Current molecular diagnostics rely on RT-PCR, but there is a need for rapid, field-deployable detection tools. Recent advances, such as CRISPR-Cas13a based SHERLOCK assays, offer sensitive and specific detection of CLRDV, with potential for on-site applications. Efficient screening techniques, supported by next-generation sequencing and transcriptomics, are essential for identifying novel resistance sources and elucidating virus-host interactions. CRISPR-based genome editing holds significant promise, as demonstrated in other crops. Targeted disruption of host susceptibility genes using CRISPR-Cas9, or direct degradation of viral genomes with RNA-targeting systems such as Cas12/Cas13, could offer durable, broad-spectrum resistance. By integrating molecular virology, high-throughput genomics, and precision gene editing, this review outlines a roadmap for translating these advances into sustainable, field-level solutions for CLRDV management and long-term cotton productivity.

RevDate: 2025-11-02

Kalinina NO, Spechenkova NA, ME Taliansky (2025)

Erratum to: Biotechnological Approaches to Plant Antiviral Resistance: CRISPR-Cas or RNA Interference?.

Biochemistry. Biokhimiia, 90(10):1450.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Shamloo S, Schloßhauer JL, Tiwari S, et al (2025)

RNA binding of GAPDH controls transcript stability and protein translation in acute myeloid leukemia.

RNA biology, 22(1):1-23.

Dysregulation of RNA binding proteins (RBPs) is a hallmark in cancerous cells. In acute myeloid leukaemia (AML) RBPs are key regulators of tumour proliferation. While classical RBPs have defined RNA binding domains, RNA recognition and function in AML by non-canonical RBPs (ncRBPs) remain unclear. Given the inherent complexity of targeting AML broadly, our goal was to uncover potential ncRBP candidates critical for AML survival using a CRISPR/Cas-based screening. We identified the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as a pro-proliferative factor in AML cells. Based on cross-linking and immunoprecipitation (CLIP), we are defining the global targetome, detecting novel RNA targets mainly located within 5'UTRs, including GAPDH, RPL13a, and PKM. The knockdown of GAPDH unveiled genetic pathways related to ribosome biogenesis, translation initiation, and regulation. Moreover, we demonstrated a stabilizing effect through GAPDH binding to target transcripts including its own mRNA. The present findings provide new insights on the RNA functions and characteristics of GAPDH in AML.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Tao XL, Lei YM, Zhou XM, et al (2025)

Allosteric Activation of Cas12a via PAM Topological Engineering for Direct and Rapid Detection of Nucleases.

Angewandte Chemie (International ed. in English), 64(45):e202515521.

A contemporary question in the intensely active field of CRISPR-Cas12a-based molecular diagnostics is how to simplify the multistep conversion process for detecting nonnucleic acid targets. Herein we describe an allosteric Y-shaped DNA structure for Cas12a activation via protospacer-adjacent motif (PAM) topological engineering (Y-COPE) to achieve straightforward and diverse nuclease monitoring. The newly designed topological structure of the Y-COPE is characterized by a split PAM embedded at the three-way junction and protospacers flanking both sides. This unique spatial configuration of the PAM effectively prevents Cas12a activation. Upon target cleavage, the released truncated fragments can dynamically correct the PAM, which promptly restores the dsDNA conformation for Cas12a activation and accomplishes signal output. Theoretical calculation results revealed that, compared with the canonical dsDNA activator, in the Y-COPE, there was a 1.8 Å increase in the center distance between Lys595 of Cas12a and the PAM, which led to a 24.2 kcal mol[-1] increase in binding free energy. This clearly revealed the underlying inhibition mechanism of the topological configuration of the PAM for Cas12a activation. This study advances the understanding of the dynamic response of Cas12a to topological PAM conformations and introduces the universal concept of CRISPR-based nonnucleic acid detection to benefit the next-generation molecular diagnostics.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Lin HK, Dai J, L Pusztai (2025)

Integrating large-scale in vitro functional genomic screen and multi-omics data to identify novel breast cancer targets.

Breast cancer research and treatment, 214(3):319-327.

PURPOSE: Our goal is to leverage publicly available whole transcriptome and genome-wide CRISPR-Cas9 screen data to identify and prioritize novel breast cancer therapeutic targets.

METHODS: We used DepMap dependency scores > 0.5 to identify genes that are potential therapeutic targets in 48 breast cancer cell lines. We removed genes that were pan-essential or were not expressed in TCGA breast cancer cohort. Genes were prioritized based on druggability using the Drug-Gene Interaction Database. Targets were defined separately for ER+, HER2+, and TNBC. A broader list of genes with dependency score > 0.25 were used to assess the associations between dependency scores and mutations and copy number variations (CNV) to identify potential synthetic lethal relationships and to map survival critical genes into biological pathways.

RESULTS: 66, 53, and 29 genes were prioritized as targets in ER+, HER2+, and TNBC, respectively. These included known actionable targets and many novel targets. ER+ included FOXA1, GATA3, LDB1, TRPS1, NAMPT, WDR26, and ZNF217; HER2+ cancers included STX4, HECTD1, and TBL1XR1; and TNBC included GFPT1 and GPX4. Synthetic lethal associations revealed 5 and 19 significant associations between potential survival critical genes and mutations in HER2+ and TNBC, respectively. For example, PIK3CA mutation increased dependency on NDUFS3 in HER2+ cancers, and CNTRL mutation increased dependency on electron transport chain (ETC) genes in TNBC. 329, 747, and 622 CNVs showed synthetic lethal association in ER+, HER2+, and TNBC, respectively.

CONCLUSION: We provide a genome-wide drug target prioritization list for breast cancer derived from integrated large-scale omics data.

RevDate: 2025-11-03
CmpDate: 2025-11-03

Mohammadzadeh R, Shahbazi S, Khodaei N, et al (2025)

Emerging Therapeutic Strategies to Combat Antimicrobial Resistance in the Post-Antibiotic Era.

Journal of basic microbiology, 65(11):e70070.

Antimicrobial resistance (AMR) is a serious global health issue. This review aims to explore alternative therapeutic strategies for combating AMR. The goal is to evaluate emerging treatments that target resistant pathogens through novel mechanisms, bypassing the limitations of traditional antibiotics. Recent researches highlight several promising alternatives, including antibodies, antimicrobial peptides, bacteriocins, bacteriophages, and probiotics (in the clinical trials) and synthetic antimicrobial peptides, anti-virulence strategies, genetically modified phages, antibacterial oligonucleotides, CRISPR-Cas9, and predatory bacteria (in the research stage). These therapies demonstrate potential to overcome AMR by targeting specific bacterial mechanisms, reducing toxicity, and evading resistance. Alternative therapies for AMR present significant promise, offering new avenues for treatment. Despite challenges in optimization and delivery, these therapies could revolutionize the way bacterial infections are treated. Continued research is crucial to address hurdles and ensure these therapies can be safely and effectively implemented in clinical settings, shaping the future of infection management.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Li S, Zhang B, Ma P, et al (2025)

The 13-lipoxygenase GmLOX6 is involved in JA biosynthesis and serves as a positive regulator of salt stress tolerance in soybean.

The Plant journal : for cell and molecular biology, 124(3):e70550.

Salinity represents a major abiotic stressor that significantly impairs soybean growth and yield. Although jasmonic acid (JA) has been firmly established as a key regulator of plant defense against salt stress, the precise functions of lipoxygenase (LOX) genes responsible for initiating JA biosynthesis remain poorly defined. Here, a comprehensive genome-wide analysis of the soybean LOX gene family was performed, and a detailed functional characterization of GmLOX6 was carried out. Subcellular localization confirmed that GmLOX6 is targeted to chloroplasts, while enzymatic assays demonstrated that it acts as a 13-LOX enzyme with a strong preference for α-linolenic acid as substrate. To clarify its role under salt stress, we generated both overexpression and CRISPR/Cas9-mediated knockout lines of soybean. Phenotypic and molecular evaluations revealed that GmLOX6 facilitates JA production under salt stress, thereby contributing to enhanced JA accumulation. This elevation in JA levels was associated with improved salt tolerance through multiple physiological adaptations, including the activation of antioxidant enzymes for the detoxification of reactive oxygen species (ROS), enhanced Na[+] extrusion to preserve ionic balance, and reinforced membrane stability. Moreover, GmRWP-RK11 was identified as a transcriptional repressor of GmLOX6. Functional disruption of GmRWP-RK11 via CRISPR/Cas9 conferred greater salt tolerance, further supporting its negative regulatory role. Collectively, these findings uncover a novel regulatory axis in which GmLOX6-mediated JA biosynthesis enhances soybean resistance to salinity through modulation of ROS homeostasis and Na[+] transport. These insights provide an expanded understanding of the transcriptional and biochemical mechanisms underpinning JA-driven stress adaptation in soybean.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Fatmi MQ, Nadeem A, Abbasov M, et al (2026)

Computational Methods to Engineer Cas Proteins for Efficient Genome Editing.

Methods in molecular biology (Clifton, N.J.), 2979:279-300.

The clustered regularly interspaced short palindromic repeats/CRISPR-associated protein (CRISPR/Cas) system has revolutionized genome editing through programmable, sequence-specific deoxyribonucleic acid (DNA) targeting. Yet, its broader application remains limited by off-target effects and context-dependent efficiency. To address these challenges, we present an integrated computational protocol with easy-to-do steps for researchers to guide the rational design of CRISPR/Cas variants with improved stability and specificity. The integrated workflow begins with coevolutionary coupling analysis to identify conserved and covarying residues critical for function. These residues are then evaluated for energetically favorable substitutions through mutant stability prediction, followed by network centrality analysis to evaluate the impact of mutations on intramolecular communication pathways, preserving key allosteric interactions. Finally, molecular dynamics (MD) simulations validate the structural integrity and dynamic behavior of the selected variants. Network analysis and molecular dynamics (MD) simulations are applied iteratively, allowing insights from MD to refine network-based evaluations and vice versa. This multiscale strategy offers a streamlined and systematic approach for engineering optimized Cas proteins for genome editing applications.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Binenbaum J, Adamkova V, Fryer H, et al (2025)

CRISPR targeting of H3K4me3 activates gene expression and unlocks centromere-proximal crossover recombination in Arabidopsis.

Nature communications, 16(1):9587.

H3K4me3 is a fundamental and highly conserved chromatin mark across eukaryotes, playing a central role in many genome-related processes, including transcription, maintenance of cell identity, DNA damage repair, and meiotic recombination. However, identifying the causal function of H3K4me3 in these diverse pathways remains a challenge, and we lack the tools to manipulate it for agricultural benefit. Here we use the CRISPR-based SunTag system to direct H3K4me3 methyltransferases in the model plant, Arabidopsis thaliana. Targeting of SunTag-SDG2 activates the expression of the endogenous reporter gene, FWA. We show that SunTag-SDG2 can be employed to increase pathogen resistance by targeting the H3K4me3-dependent disease resistance gene, SNC1. Meiotic crossover recombination rates impose a limit on the speed with which new traits can be transferred to elite crop varieties. We demonstrate that targeting of SunTag-SDG2 to low recombining centromeric regions can significantly stimulate proximal crossover formation. Finally, we reveal that the effect is not specific to SDG2 and is likely dependent on the H3K4me3 mark itself, as the orthogonal mammalian-derived H3K4me3 methyltransferase, PRDM9, produces a similar effect on gene expression with reduced off-target potential. Overall, our study supports an instructive role for H3K4me3 in transcription and meiotic recombination and opens the door to precise modulation of important agricultural traits.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Brown BC, Tokolyi A, Morris JA, et al (2025)

Large-scale causal discovery using interventional data sheds light on gene network structure in k562 cells.

Nature communications, 16(1):9628.

Inference of directed biological networks is an important but notoriously challenging problem. The recent proliferation of large-scale CRISPR perturbation data provides a new opportunity to tackle this problem by leveraging the transcriptional response to the presence of a gene-targeting guide. Here, we introduce inverse sparse regression (inspre), an approach to learning causal networks that leverages large-scale intervention-response data. Applied to 788 genes from the genome-wide perturb-seq dataset, inspre discovers a network with small-world and scale-free properties. We integrate our network estimate with external data, finding relationships between gene eigencentrality and both measures of gene essentiality and gene expression heritability. Our analysis helps to elucidate the structure of networks that may underlie complex traits.

RevDate: 2025-11-02
CmpDate: 2025-11-02

Mao X, Xiong J, Cai M, et al (2025)

SCARB1 links cholesterol metabolism-mediated ferroptosis inhibition to radioresistance in tumor cells.

Journal of advanced research, 77:207-219.

INTRODUCTION: Ferroptosis is an iron-dependent form of cell death triggered by the excessive accumulation of lipid peroxides. Understanding the regulatory mechanisms of ferroptosis and developing strategies to target this process hold significant clinical applications in tumor therapy.

OBJECTIVE: Our study aims to search for novel candidate genes involved in the regulation of ferroptosis and to investigate their mechanism of action in ferroptosis and tumor therapy.

METHODS: We employed a CRISPR-Cas9 library to perform a genome-wide screen under ferroptosis inducer treatment conditions, revealing Scavenger Receptor Class B Member 1(SCARB1) as a novel candidate gene involved in ferroptosis regulation. Subsequently, lipidomic analyses, metabolic interventions, and relevant cellular experimental analyses were performed to elucidate the role of SCARB1 in ferroptosis, lipid peroxidation, and tumor therapy.

RESULTS: Our study confirmed that SCARB1 significantly inhibits ferroptosis and lipid peroxidation induced by ferroptosis inducers. Mechanistically, SCARB1 inhibits ferroptosis through the regulation of cholesterol metabolism, and the upregulation of CoQ10 level is demonstrated to mediate the suppression of ferroptosis by SCARB1 after lipidomic analysis and metabolic intervention. Interestingly, SCARB1 exerts a tumor suppressive effect regarding tumor growth, migration and invasion, which is possibly independent of ferroptosis regulation. However, SCARB1 promotes radioresistance through the upregulation of cholesterol metabolism and inhibition of ferroptosis, while the combination of ferroptosis inducers can overcome radioresistance in tumor cells with high SCARB1 expression.

CONCLUSION: This study establishes a theoretical foundation for the regulation of ferroptosis by SCARB1 and highlights the potential of targeting lipid metabolism to overcome radioresistance in cancer therapy. The identification of SCARB1 as a key player in ferroptosis and its dual role in tumor suppression and radioresistance provides new avenues for therapeutic intervention in cancer treatment.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Sancho-Shimizu V (2025)

VUS no more: Decoding inborn errors of immunity for clinical action.

Cell, 188(22):6105-6106.

Saturation genome editing meets functional phenotyping to turn sequencing ambiguity into actionable diagnoses.

RevDate: 2025-10-31

Zhang J, Zhu M, Yan H, et al (2025)

Split CRISPR/Cas systems: Pioneering solutions for molecular diagnostics challenges.

Biosensors & bioelectronics, 293:118177 pii:S0956-5663(25)01054-1 [Epub ahead of print].

Split CRISPR/Cas systems have recently emerged as revolutionary tools in molecular diagnostics, addressing the limitations of conventional CRISPR-based detection methods, such as low sensitivity and specificity for low-abundance targets and limited regulatory flexibility. This review highlights "split-activation" strategies that enhance analytical performance without requiring pre-amplification. It elaborates on two key approaches: split activator-mediated Cas systems for ultrasensitive RNA detection and split crRNA architectures for multiplex nucleic acid analysis. These innovations achieve significant improvements in sensitivity for femtomolar-level biomarkers while maintaining superior single-base discrimination. We examine their applications in clinical and on-site monitoring, analyze current challenges including background noise, multiplex capacity, and cost considerations. Future directions include developing customized Cas variants, nanomaterial-based amplification-free workflows, and integrated microfluidic platforms. This technology holds great promise for precision diagnostics, particularly in resource-limited settings.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Li S, Vonesch SC, Roy KR, et al (2025)

The editable landscape of the yeast genome reveals hotspots of structural variant formation.

Science advances, 11(44):eady9875.

It is unclear how CRISPR editing outcomes vary across the genome and whether undesirable events such as structural variants (SVs) are predictable or preventable. To define a genome-wide map of editability, we performed whole-genome sequencing on 1875 budding yeast clones edited across 16 chromosomes by CRISPR-Cas9 and donor-templated repair. We found that unintended edits, including short indels and SVs, were enriched in specific genomic and sequence contexts. We developed a predictive model, SCORE (System for CRISPR Outcome and Risk Evaluation), which revealed 4.8% of the genome as SV prone, consisting of 562 SV hotspots. Donor repair-enhancing strategies suppressed SV formation in regions with moderate, but not high, predicted risk. Applying SCORE to the Sc2.0 synthetic yeast genome revealed a markedly altered SV landscape due to the removal of endogenous repetitive elements and the insertion of loxP sites. Our study provides the genome-scale map of SV hotspots after CRISPR editing and predictive and experimental tools to mitigate their formation.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Zhang H, You J, Zhou H, et al (2025)

The two-component nuclease-active KELShedu system confers broad antiphage activity via abortive infection.

Science advances, 11(44):eadv4747.

Bacteriophages and bacteria engage in a continuous evolutionary arms race, driving the development of intricate bacterial defense systems such as CRISPR-Cas, BREX (Bacteriophage Exclusion), Gabija, and Shedu. Here, we characterize a two-component KELShedu system in Escherichia coli that confers resistance to phages via abortive infection. The KELShedu system comprises KELA, a double-stranded DNA-binding protein, and KELB, a metal ion-dependent nuclease harboring the DUF4263 domain. In addition, we find that physiological levels of nucleotide triphosphates (NTPs) inhibit the DNA cleavage activity of the KELShedu system, suggesting that KELShedu's activation depends on reduced intracellular NTP levels during phage invasion. Our research demonstrates that the KELShedu system responds to nucleotide depletion triggered by phage replication, leading to nonspecific degradation of cellular DNA and ultimately inducing abortive infection. These insights into the KELShedu system expand the repertoire of bacterial antiphage mechanisms and lay the groundwork for applications in microbial engineering and therapeutic development.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Vadakkethil AA, Panda S, Mitra A, et al (2025)

CRISPR-GATE: a one-stop repository and guide to computational resources for genome editing experimentation.

Briefings in bioinformatics, 26(5):.

Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-CRISPR associated protein (CRISPR-Cas) has emerged and evolved as a revolutionary genome editing technology, transforming research across diverse biological disciplines. Over the past decade, this technology has unveiled numerous opportunities for precise genome manipulation. However, the processes of discovering Cas proteins, repurposing them as editing tools, selecting appropriate candidate tool from the CRISPR-toolbox, designing experiments, and analyzing data are often complex and require careful consideration. To support researchers at every stage of CRISPR experimentation, a wide array of web resources has been developed. In this article, we provide a comprehensive overview of standalone and web-based tools that assist in the identification of CRISPR-Cas systems and the design of guide RNAs (gRNAs). We also highlight tools for evaluating gRNA efficiency, predicting CRISPR-Cas9 mutation profiles, as well as tools for base editing and prime editing, and the analysis and visualization of experimental results. Additionally, we introduce CRISPR-Gateway for Accessing Tools and Resources (CRISPR-GATE), an all-inclusive web repository that consolidates publicly available tools for genome editing research. This repository offers a categorized and user-friendly interface, allowing researchers to quickly access relevant tools based on their specific needs. CRISPR-GATE aims to streamline the search for CRISPR resources, facilitating both education and accelerating innovation. The web repository can be accessed from https://crispr-gate.daasbioinfromaticsteam.in/.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Zaheer A, AboQuella NM, Wadan AS, et al (2025)

CRISPR-based gene therapy for huntington's disease: current advances and future prospects.

Neurogenetics, 26(1):76.

CRISPR-Cas9 technology offers transformative potential in treating Huntington's Disease (HD) by directly addressing its genetic root causes. This manuscript explores the pathophysiological mechanisms of HD, characterized by toxic mutant huntingtin (mHTT) protein resulting from expanded CAG repeats in the HTT gene, and the challenges posed by current therapeutic limitations. We comprehensively review the mechanisms of CRISPR-based therapeutic strategies, including excision of expanded repeats, allele-specific targeting, and epigenome editing, highlighting their efficacy in preclinical studies using animal models and human iPSCs. Delivery methods, such as viral and non-viral vectors, are analysed for their role in optimizing therapeutic outcomes while minimizing off-target effects and immune responses. Ethical and safety considerations, especially regarding precision and long-term impacts, are critically examined alongside emerging strategies to enhance specificity. With ongoing clinical trials and advancements in delivery systems, CRISPR technology represents a paradigm shift in addressing HD and broader neurodegenerative conditions. This review underscores the promise of gene editing in overcoming existing barriers and paving the way for transformative therapeutic approaches.

RevDate: 2025-10-31

Yu T, Xie J, Huang X, et al (2025)

BaeR and H-NS control CRISPR-Cas-mediated immunity and virulence in Acinetobacter baumannii.

mSystems [Epub ahead of print].

Acinetobacter baumannii balances its remarkable ability to acquire antibiotic resistance genes via horizontal gene transfer (HGT) with the immune defense functions of its CRISPR-Cas system, forming a dynamic equilibrium governed by intricate transcriptional regulation. However, the regulatory mechanisms underlying the I-Fb CRISPR-Cas system in A. baumannii remain poorly understood. This study elucidated a multitiered regulatory axis mediated by BaeR and H-NS that coordinates immune defense and virulence expression in the I-Fb CRISPR-Cas system. Using DNA pull-down and electrophoretic mobility shift assay (EMSA), we demonstrated that H-NS directly binds AT-rich regions within the cas3 promoter, suppressing both interference activity and adaptive immunity of the I-Fb CRISPR-Cas system. Intriguingly, the two-component regulator BaeR controlled this suppression by positively regulating H-NS expression. The results revealed that Δcas3 mutants exhibited increased biofilm thickness, elevated the extracellular matrix component poly N-acetyl glucosamine (PNAG) production, upregulated pilus expression, and significantly enhanced epithelial cell adhesion. Strikingly, Δh-ns-cas3 and ΔbaeR-cas3 double-knockout strains showed no statistically significant differences in virulence phenotypes compared to the Δcas3 single mutants. These findings indicate CRISPR-Cas-mediated inhibition of biofilm formation is abolished upon cas3 deletion, thereby releasing the regulatory constraints imposed by BaeR and H-NS. This dysregulation leads to excessive biofilm and extracellular matrix component accumulation, ultimately amplifying bacterial colonization capacity and pathogenicity in host environments. This discovery reveals the dual regulatory roles of BaeR and H-NS in the A. baumannii I-Fb CRISPR-Cas system, mediating both immune defense and virulence modulation. These insights establish a theoretical foundation for novel antimicrobial strategies targeting CRISPR-Cas regulatory networks.IMPORTANCEA. baumannii, a leading cause of drug-resistant nosocomial infections, evolves antibiotic resistance through horizontal gene transfer (HGT) while employing CRISPR-Cas systems to limit foreign DNA invasion. This study reveals that the I-Fb CRISPR-Cas system, typically a defense mechanism, functions as a repressor of virulence traits in A. baumannii. We demonstrate that the transcriptional regulators H-NS and BaeR form a hierarchical axis suppressing Cas3 expression, thereby constraining biofilm formation and host adhesion. Strikingly, CRISPR-Cas deficiency enhances virulence, thickens biofilms, elevates PNAG production, and enhances epithelial colonization through escape from BaeR-/H-NS-mediated control. This work redefines CRISPR-Cas as a dual-function module balancing immune defense and pathogenicity, exposing the BaeR-H-NS-Cas3 axis as a druggable target for novel anti-infectives aimed at disrupting bacterial adaptive evolution.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Xin M, Liu J, Zhou H, et al (2026)

An H1N1 virus biosensor based on enzyme activity-gated PER-CRISPR/Cas12a cascade signal amplification.

Enzyme and microbial technology, 192:110759.

The rapid and accurate detection of the H1N1 influenza virus is a key link in epidemic prevention and control. This study innovatively constructed a cascade signal amplification biosensor based on DNA polymerase activity regulation, aiming to achieve ultra-sensitive and highly specific detection of viral nucleic acids. This biosensor has the following significant advantages: (i) Molecular lock-key regulation mechanism: A functional DNA inhibitor is designed to form a complex with Taq DNA polymerase, and the target H1N1 RNA is specifically recognized to release enzyme activity inhibition, converting the target presence information into a PER reaction initiation signal. (ii) Cascade signal amplification system: The single-stranded DNA generated by PER activates Cas12a trans-cleavage activity, achieving a three-level signal amplification of enzyme activity activation → nucleic acid synthesis → CRISPR cleavage. The biosensor exhibits a linear detection range between 1 pM and 1 μM, with a detection limit of 25 fM. Moreover, the platform showed high versatility and could be readily adapted for the detection of other pathogens such as SARS-CoV-2 by simply modifying the nucleic acid sequences of the inhibitor and activator. This study not only provides a new tool for the screening of H1N1 influenza virus, but also offers a novel strategy for the development of next-generation molecular detection technologies suitable for point-of-care diagnostics, indicating considerable application potential.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Zhu L, Lin Y, Yang G, et al (2025)

A Rapid On-Site Visualization Detection System for Fusarium oxysporum f. sp. cubense Tropical Race 4 Utilizing RPA-CRISPR/Cas12a.

Plant disease, 109(10):2062-2069.

Fusarium wilt of banana, a disease with devastating impacts on banana plants, is primarily caused by a pathogenic fungus called Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4). To facilitate control and interrupt the spread of Fusarium wilt of banana, we developed a rapid on-site visualization system for detecting Foc TR4 based on recombinase polymerase amplification (RPA) combined with CRISPR/Cas12a. Based on Foc TR4-specific sequences, primers, crRNA, and ssDNAs were designed. The detection system exhibited high specificity, with amplification signals observed exclusively in samples containing Foc TR4. Additionally, the system showed high sensitivity, with a limit of detection (LOD) of approximately 20 copies, and high efficiency, with detection results generated within 1 h from time of amplification. Notably, this method does not require large-scale instruments, making it a convenient and rapid approach. The detection system represents the first instance of on-site visualization of Foc TR4. This system can be employed for early detection of Foc TR4 and can provide a technical reference for the rapid detection and applications in the field of other pathogens.

RevDate: 2025-11-01
CmpDate: 2025-11-01

Zhang H, Li YC, Pang D, et al (2025)

Desmocollin 2 is a dominant entry receptor for Epstein-Barr virus infection of epithelial cells.

Nature microbiology, 10(11):2768-2780.

Epstein-Barr virus (EBV) can infect B cells and epithelial cells, and cause lymphomas and various epithelial malignancies. During epithelial cell infection, EBV employs a complex combination of viral glycoproteins and host receptors. However, the exact mechanism and whether a dominant receptor exists remain unclear. Here we identify desmocollin 2 (DSC2) as a dominant EBV entry receptor for epithelial cell infection using CRISPR-Cas9 screening. Knockout of DSC2 reduced EBV infection in both nasopharyngeal and gastric epithelial cell lines, and infection was rescued when DSC2 expression was restored. Expression of human DSC2 in non-EBV-susceptible hamster cell lines enabled susceptibility to EBV. Furthermore, we found that DSC2 directly binds to EBV glycoprotein H/glycoprotein L through its extracellular domain, particularly the preEC-EC2 regions, which could be targeted by polyclonal antibodies, therefore blocking EBV infection in primary epithelial cells. DSC2 enabled virus entry independent of Ephrin receptor A2. These findings could aid development of currently unavailable animal models and support development of targeted therapies.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Araújo MRB, Dos Santos LS, Prates FD, et al (2025)

Virulence and mutations analysis based on the whole genome of a Brazilian Corynebacterium diphtheriae strain isolated from a cutaneous infection.

Frontiers in microbiology, 16:1579154.

Corynebacterium diphtheriae is the main etiological agent of diphtheria, a potentially fatal disease whose most severe signs and symptoms result from the action of an exotoxin, the diphtheria toxin (DT). Although non-toxigenic C. diphtheriae strains have been associated with several diseases, including cutaneous infections and endocarditis, they are not monitored in many countries, and their mechanisms of virulence and antimicrobial resistance remain underexplored. Therefore, this study aimed to provide a comprehensive characterization -through genomic, in vitro, and in vivo analyses - of a non-toxigenic C. diphtheriae strain (46855) isolated from a leg lesion, highlighting its pathogenic potential and resistance profile. The isolate was assigned to a novel sequence type (ST-925) and was found to be resistant to tetracycline and rifampin. Multiple antimicrobial resistance genes were predicted in the genome, such as tet(33), rbpA, and rpoB2, in addition to mutations in the rpoB gene. A diverse set of virulence-associated genes related to adhesion, iron uptake systems, gene regulation, and post-translational modification was also identified. The isolate was able to form biofilm in vitro and exhibited strong virulence in Galleria mellonella larvae and A549 human pneumocyte cells. Finally, the structural analysis of the rpoB gene, carried out for the first time in this study, linked the observed mutations to rifampin resistance in C. diphtheriae. In summary, the data revealed that C. diphtheriae 46855, although non-toxigenic, harbors multiple genes associated with antimicrobial resistance and virulence, emphasizing the need for greater surveillance and functional studies on non-toxigenic strains.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Zhang S, Chu M, X Sun (2025)

The arms race in bacteria-phage interaction: deciphering bacteria defense and phage anti-defense mechanisms through metagenomics.

Frontiers in microbiology, 16:1687307.

Bacteriophages are viruses that specifically infect bacteria and co-evolve with their hosts through mutual interactions. They represent one of the most significant drivers of microbial diversity, influencing its evolution, generation, and maintenance. To counter bacteriophage infection, bacteria have developed sophisticated immune systems, including both passive adaptations, such as inhibiting phage adsorption and preventing DNA entry, and active defense systems such as restriction-modification systems and CRISPR-Cas systems. The ongoing arms race between bacteriophages and bacteria has left distinct evolutionary signatures in their genomic sequences. Advances in large-scale genomic and metagenomic sequencing technologies, coupled with bioinformatics approaches, have greatly enhanced our understanding of bacteria-phage interaction mechanisms, driving progress in bacteriophage biology. This review systematically analyses the diverse immune strategies bacteria employ against phage infection, elucidates the coordination and interrelationships among different anti-phage mechanisms, and highlights potential directions for future research.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Elsayed EM, Stukenberg D, Meier D, et al (2025)

RECKLEEN is a lambda Red/CRISPR-Cas9 based single plasmid platform for enhanced genome editing in Klebsiella pneumoniae.

Communications biology, 8(1):1509.

Klebsiella pneumoniae (Kp) has evolved as a major public health threat due to its multidrug-resistance (MDR) and hypervirulence. Current Kp genome-editing tools are constrained by cumbersome workflows, low flexibility, and limited scalability. Here, we present the RECKLEEN system -Recombineering/CRISPR-based KLebsiella Engineering for Efficient Nucleotide editing - as a single plasmid platform designed for precise genetic manipulation of Kp. RECKLEEN combines lambda Red recombineering with powerful CRISPR-Cas9-based targeted counterselection, achieving up to 99.998% killing efficiency. By implementing the near PAM-less SpG Cas9 variant in RECKLEEN, the compatible target sequence spectrum was significantly broadened. This approach enables deletions, point mutations, and DNA integrations, with efficiencies reaching 100% of the counter-selected clones. Simultaneous multi-target deletions were accomplished with up to 72% efficiency. To streamline the process, we developed a toolbox of eleven plasmids based on a modular cloning standard, enabling time- and resource-efficient assembly of editing constructs. This allows a 5-days workflow, from plasmid construction to the generation of strains with the desired genetic modification(s). The efficacy of RECKLEEN extends to various MDR Kp strains, such as ATCC 700721, ATCC BAA-1705, and ATCC 700603, demonstrating its broad applicability. RECKLEEN significantly enhances genome-editing capabilities for Kp, advancing research into its pathology and MDR mechanisms.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Meng X, Yue Y, Huang M, et al (2025)

DNAzyme-CRISPR driven dual-mode biosensor with nanozyme signal amplification for on-site Pb[2+] detection.

Analytica chimica acta, 1379:344711.

BACKGROUND: Lead ion (Pb[2+]) is a toxic heavy metal that poses severe threats to food safety. Traditional methods like inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometry (AAS) rely on bulky instrumentation, which are limited by high costs, complex sample preparation requirements, and inability to meet the demands for rapid on-site testing. Nanozyme-based biosensors have emerged as promising alternatives, yet single-mode sensors often suffer from matrix interference in complex food samples. Therefore, developing a rapid and reliable on-site method is critical for Pb[2+] detection.

RESULTS: To address this challenge, a CRISPR/Cas12a-driven dual-mode biosensor integrating Pt/CeO2 nanozyme-mediated peroxidase activity with GR-5 DNAzyme recognition was developed. The biosensor's design capitalizes on GR-5 DNAzyme for Pb[2+]-specific recognition, triggering CRISPR/Cas12a-mediated cleavage of electrochemical/colorimetric signal probe SH-ssDNA-Pt/CeO2 to generate dual signals. This innovative platform synergizes electrochemical precision and colorimetric simplicity for Pb[2+] detection in complex food matrices. The biosensor achieved an ultra-sensitive electrochemical response (linear range: 0.002-200 nM; limit of detection: 0.14 pM) alongside a robust colorimetric readout (linear range: 0.5-2000 nM; limit of detection: 0.47 nM), representing significant sensitivity improvements over conventional single-mode sensors. Crucially, the intrinsic cross-verification mechanism between orthogonal signal modalities minimized false positives while ensuring >90.5 % recovery in spiked corn, edible oil, beef and red wine samples with RSD <5 %. These results highlight the potential of the dual-mode sensor as a practical, field deployable sensing platform for the detection of Pb[2+].

SIGNIFICANCE: This work innovatively integrates the specificity of CRISPR with the catalytic properties of nanozymes into a self-validating electrochemical/colorimetric dual-mode system. The detection method not only establishes a robust platform for highly sensitive, reliable and visualized detection of Pb[2+] in complex food matrices, but also pioneers a new paradigm for multi-modal biosensor design.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Bicknell R, AMG Koltunow (2026)

Pilosella: A Dicotyledonous Model for Studying Aposporous, Autonomous Apomixis.

Methods in molecular biology (Clifton, N.J.), 2987:209-220.

Pilosella, a member of the Compositae, is a model system used to study the molecular genetics of aposporous apomixis. These plants are small, rapidly growing perennials that are easy to cultivate both in the greenhouse and in tissue culture. Apomixis in Pilosella occurs by apospory where mitotically derived embryo sacs arise adjacent to cells undergoing female gamete meiosis in the ovule. Seed initiation is autonomous, where both embryo and endosperm form without fertilization in the aposporous embryo sac. Apomixis is not fully penetrant in Pilosella. Instead, plants are facultatively apomictic, and apomixis can be easily scored through the simple decapitation of the immature capitulum bud. Natural sexual and facultatively apomictic forms are readily cross-compatible, facilitating comparative studies of inheritance and allele function. A wide range of experimental methods have been described for these plants, including histological techniques for studying the cytological aspects of apomixis, an efficient Agrobacterium-mediated transformation system, CRISPR/Cas9 mutagenesis, and mapping approaches that use deletion mutation and segregation in polyhaploid populations. Freely available online resources include a genome assembly, a molecular map based on cDNA markers and a transcriptome database. Collectively, these resources make Pilosella a highly tractable experimental system for studying the genetic control of native apomixis.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Radoeva T, Rigola D, Op den Camp RHM, et al (2026)

Targeted Mutagenesis in Natural Apomicts.

Methods in molecular biology (Clifton, N.J.), 2987:181-191.

Apomixis-clonal reproduction through seeds-is an alternative reproductive strategy that takes place in less than 0.1% of plant species and has evolved independently in diverse plant lineages. To date, the genetic basis of apomixis has been unraveled genetically in only a few genera. The identification of causal apomixis genes is technically challenging, as apomictic species are typically polyploid and the genetic loci associated with apomixis are often in low-recombination regions limiting conventional fine-mapping. In triploid apomictic dandelion (Taraxacum officinale), after conventional genetic mapping, deletion mapping, and complete apomixis loci haplotype assembly, we made use of targeted mutagenesis using CRISPR/Cas9 technology to identify the Taraxacum officinale PARTHENOGENESIS (ToPAR) gene that is responsible for embryogenesis in the absence of fertilization. Here, we report the methods used to clone the ToPAR gene by targeted mutagenesis and we expect that the general principles could be applied in other systems to identify novel apomixis genes.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Kumar U, Dwivedi D, U Das (2025)

Advancements in CRISPR-Mediated Multiplex Genome Editing: Transforming Plant Breeding for Crop Improvement and Polygenic Trait Engineering.

Biotechnology journal, 20(11):e70148.

With accelerating climate change and the urgent need to stack polygenic traits, multiplex CRISPR/Cas offers a scalable route to resilient crops-yet low editing efficiency and regeneration bottlenecks remain critical constraints. This review centers on multiplex strategies for polygenic trait engineering in plants, surveying compact nucleases (Cas9, Cas12, Cas13 and emerging ultra-compact variants), polycistronic gRNA platforms (tRNA-gRNA arrays, self-cleaving ribozymes, Csy4 processing), and delivery routes (Agrobacterium, biolistics, protoplast transfection, viral vectors). We highlight concrete outcomes-for example, targeted edits in PYL ABA-receptors increased rice grain yield by up to 31% in field tests-and applications from yield and disease resistance to abiotic-stress tolerance, nutrient biofortification and de novo domestication. Technical risks (off-targets, mosaicism, chromosomal rearrangements, transformability) are appraised alongside emerging fixes: compact/engineered nucleases, RNA-processing arrays, morphogenic regulators, and AI-driven sgRNA design integrated with multi-omics. By prioritizing multiplex approaches for polygenic trait stacking, the review argues that these tools are essential to accelerate precision breeding for climate-adapted agriculture.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Dashti M, Mohammaddust Sarab M, Shad F, et al (2025)

CRISPR-mediated engineering of mesenchymal stromal/stem cells: a summary of recent progress in immunological applications for regenerative medicine and cancer therapy.

Stem cell research & therapy, 16(1):592.

Mesenchymal stromal/stem cells (MSCs) have introduced as a cornerstone of regenerative medicine, owing to their immunomodulatory properties and therapeutic potential in autoimmune and inflammatory disorders. Although, their clinical application is often restricted due to immune rejection and heterogeneity in immunoregulatory responses. The advent of Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated protein 9 (CRISPR/Cas9) technology has revolutionized MSC engineering, enabling precise genetic modifications to enhance their immunological efficacy. This review explores how CRISPR-mediated editing of MSCs can mitigate immunogenicity, amplify anti-inflammatory functions, and repurpose MSCs for targeted immunotherapy. Key strategies include knockout of β2-microglobulin to evade T-cell recognition, augmentation of anti-inflammatory mediators like interleukin (IL)-10 and TNF-alpha stimulated gene/protein 6 (TSG-6), and disruption of pro-inflammatory pathways such as toll-like receptor 4 (TLR4)/NF-κB. In addition, CRISPR-engineered MSCs demonstrate promise in reshaping tumor microenvironments and combating bacterial infections through enhanced innate immunity. Despite challenges including off-target effects and delivery optimization, CRISPR-tailored MSCs represent a transformative approach to overcoming immunological barriers, paving the way for universal, off-the-shelf therapies in rheumatoid arthritis, cancer, and beyond.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Mirzaei F, Mosaffa Jahromi A, Molavi H, et al (2025)

Targeting RNA-Binding proteins Roquin-1 and Regnase-1 could enhance CAR-iPSC-derived macrophage immunotherapy for solid tumors: a perspective and challenges.

RNA biology, 22(1):1-7.

Solid tumours present major treatment obstacles because of their immunosuppressive microenvironment and poor response to traditional chimeric antigen receptor (CAR)-based immunotherapies. Recent advances in cellular engineering have introduced CAR-macrophages derived from induced pluripotent stem cells (CAR-iMacs) as a promising approach to get around these obstacles. CAR-iMacs are designed to attack tumours, but their phenotypic plasticity can cause them to transform into M2-like macrophages in the tumour environment (TME), where they may instead suppress immune responses and promote tumour progression and metastasis. Roquin-1 and Regnase-1 are RNA-binding proteins that act as negative regulators of inflammatory genes that contribute to the phenotypic plasticity of macrophages. This perspective highlights a novel approach to augmenting anti-tumour responses of CAR-iMacs by simultaneously knocking out Roquin-1 and Regnase-1 via CRISPR-Cas9 gene editing. This approach drives a shift from an immunosuppressive M2-like state to an M1 state, promoting sustained pro-inflammatory signalling, boosting phagocytic and cytotoxic capabilities within the tumour microenvironment. Addressing a serious constraint in conventional adoptive cell therapies, this dual-targeting platform could provide a potent and scalable immunotherapeutic treatment for solid malignancies.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Combredet C, Ansel M, T Brunet (2025)

A selection-based knockout approach for a choanoflagellate reveals regulation of multicellular development by Hippo signaling.

Cell reports, 44(10):116345.

Choanoflagellates, the closest living relatives of animals, provide crucial insights into animal origins. The multicellular choanoflagellate Salpingoeca rosetta can be genetically modified, but existing knockout (KO) pipelines are time consuming and have variable efficiency. Here, we present a fast and robust KO method for S. rosetta. We use CRISPR-Cas9 to inactivate target genes by interrupting, or fully replacing, their coding sequence with a selectable antibiotic resistance cassette. We inactivated three known S. rosetta multicellular developmental regulators (rosetteless, couscous, and jumble) and two homologs of Hippo pathway genes that control multicellular size in animals (warts and yorkie). Interestingly, warts-KO rosettes were consistently larger than their wild-type counterparts. RNA sequencing revealed that Warts and Yorkie regulated several extracellular matrix genes involved in multicellularity (including couscous), suggesting that Hippo signaling regulates multicellular size in choanoflagellates by modulating matrix secretion. We discuss the potential of our method to accelerate choanoflagellate functional genetics.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Kalchschmidt J, Kanno T, Park S, et al (2025)

Biphasic control of the B cell transcriptome by mTORC1 and GSK3.

Cell reports, 44(10):116361.

A central question in immune regulation is how cells coordinate transcriptional responses to environmental cues. It remains unclear whether transcriptional regulation is controlled by isolated mechanism or integrated regulatory programs. Here, we develop a high-sensitivity, genome-wide CRISPR-Cas9 screening platform with 47 transcriptional reporters in human B cell lymphoma, identifying 4,440 regulators and 17,638 regulatory interactions. To enable the exploration of these networks, we establish B-LEARN, an interactive portal for data visualization and discovery. Our results reveal a large number of shared regulators across our 47 screens that act as context-dependent activators or repressors. Globally, we uncover a biphasic regulatory architecture in which mTORC1 and GSK3 exert opposing control over the B cell transcriptome. Notably, mTOR inhibition broadly activates key B cell genes, an effect antagonized by GSK3. Thus, B cell transcription is governed by an integrated, pathway-driven circuit, offering new targets to modulate gene expression in lymphoma and autoimmune disease.

RevDate: 2025-10-31
CmpDate: 2025-10-31

Xia Y, Guo R, Lu T, et al (2025)

PagHB7/PagABF4-PagEPFL9 Module Regulates Stomatal Density and Drought Tolerance in Poplar.

Plant biotechnology journal, 23(11):4857-4871.

Epidermal patterning factor-like 9 (EPFL9) influences stomatal density and growth in poplar. There have been no reports on homeobox 7 (HB7) and ABRE binding factor 4 (ABF4) regulating stomatal density or drought tolerance by targeting EPFL9 in poplar. This study revealed that EPFL9 was specifically localised in guard cells in leaves and responded to drought stress. By constructing CRISPR/Cas9-mediated PagEPFL9 gene-edited lines, we found that epfl9 mutant plants showed significantly reduced stomatal density, inhibited growth and enhanced drought resistance. However, PagEPFL9 overexpression increased its drought stress sensitivity by increasing the stomatal density. PagHB7 was demonstrated to be an upstream regulator of PagEPFL9 by yeast one-hybrid screening library experiments, yeast one-hybrid experiments, electrophoretic mobility shift assay and dual luciferase reporter gene assay experiments. Yeast two-hybrid, bimolecular fluorescence complementation, split luciferase complementation assays, GST pull-down, electrophoretic mobility shift assay and dual luciferase reporter gene assay experiments further demonstrated that PagHB7 interacted with PagABF4 and that PagABF4 enhanced the inhibitory effect of PagHB7 on PagEPFL9. Knockout plants of PagHB7, a negative regulator of PagEPFL9, had a significantly increased stomatal density and reduced drought tolerance. Poplars overexpressing PagABF4 showed similar phenotypes to poplars knocking out PagEPFL9, with stomatal density significantly lower than that of WT, which may result in greater drought tolerance. Our study demonstrates that PagHB7 and PagABF4 interact with each other and regulate stomatal density by targeting PagEPFL9, thereby affecting drought resistance in poplar. This study provides new genetic resources for molecular design breeding of plant growth and drought tolerance.

RevDate: 2025-10-30

Campbell IW, Basta DW, Zingl FG, et al (2025)

Anoxia activates CRISPR-Cas immunity in the mouse intestine.

Nature microbiology [Epub ahead of print].

The natural context in which CRISPR-Cas systems are active in Enterobacteriaceae has remained enigmatic. Here we find that the Citrobacter rodentium type I-E CRISPR-Cas system is activated by the oxygen-responsive transcriptional regulator Fnr in the anoxic environment of the mouse intestine. Since Fnr-dependent regulation is predicted in ~41% of Enterobacteriaceae cas3 orthologues, we propose that anoxic regulation of CRISPR-Cas immunity is an adaptation that protects Enterobacteriaceae against threats from foreign DNA within the intestinal microbiome.

RevDate: 2025-10-30

Yan X, Liu B, Zhou S, et al (2025)

A Chimeric Photo-Controllable CRISPR/Cas12a System for Universal and Fast Diagnostics.

Analytical chemistry [Epub ahead of print].

The potential of clustered regularly interspaced short palindromic repeats (CRISPR) and corresponding CRISPR-associated (Cas) protein systems (CRISPR/Cas) systems for biomedical applications is tremendous; however, precise control of their activity is essential to better harness this potential and, beyond this, to develop reliable diagnostic reagents. Herein, we report on such a strategy by controlling the CRISPR/Cas12a activity using a photo-controllable CRISPR RNA (crRNA). To this end, the 3' end of crRNA was conjugated to a G-quadruplex (G4) block through a photocleavable linker: upon photo irradiation, the G4 trigger is removed, thus allowing for the DNA target to access and hybridize with the crRNA, and thus be processed by the CRISPR/Cas12a system. The efficiency of this approach was demonstrated by the detection of human papillomavirus 16 DNA in 50 clinical samples: our one-pot strategy was found to be as efficient as the routinely implemented method (qPCR), with 95.7% sensitivity and 100% specificity, in addition to be faster (25 versus 60 min) and both simpler and less expensive (being implementable as lateral flow test strips). Collectively, this new and fully controllable CRISPR/Cas system holds great potential for next-generation clinical diagnostics.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Gautam V, Jambagi SR, M Muthugounder (2025)

Genome editing of detoxification gene repertoires in insects using clustered regularly interspaced short palindromic repeats (CRISPR): A systematic review and meta-analysis.

Pesticide biochemistry and physiology, 215:106687.

Decoding the molecular mechanisms underlying insect resistance to insecticides and host plant adaptation is essential for effective and sustainable Insecticide Resistance Management (IRM). Reverse genetic approaches targeting "target site resistance" can help control pests without harming pollinators and beneficial biocontrol agents. Understanding the role of mutations involved in xenobiotic resistance enables the judicious use of pesticides. CRISPR-based genome editing allows precise manipulation of detoxification genes, helping to decipher their roles in resistance development. This review provides a comprehensive overview of CRISPR-mediated genome editing in insect detoxification genes and their involvement in resistance mechanisms. In addition to synthesizing overall data trajectories, we present study-level effect sizes that highlight context-specific responses to gene editing, offering insights that can inform future experimental designs and functional validation studies.

RevDate: 2025-10-29

Fu H, Xu W, Huang M, et al (2025)

Molecular detection of Salmonella.

Journal of food protection pii:S0362-028X(25)00211-X [Epub ahead of print].

The genus Salmonella consists of a group of globally significant foodborne pathogens that pose substantial public health risks. Traditional detection methods are inadequate for rapid diagnosis and effective epidemic surveillance due to limitations such as time-consuming procedures and insufficient sensitivity. In recent years, development of molecular techniques has driven innovations in Salmonella detection. Nucleic acid-based detection methods including polymerase chain reaction (PCR), real-time fluorescent quantitative PCR (qPCR), whole genome sequencing (WGS) and more emerge as crucial approaches for Salmonella detection due to their high sensitivity, specificity, and rapidity. Our review systematically summarized technological advancements in molecular detection of Salmonella, including specific genetic targets and drug resistance genes used for molecular detection, typing technologies, and emerging techniques such as CRISPR-Cas systems and microfluidic chips. This review comprehensively covers a wide array of molecular detection and characterization technologies, including conventional PCR, qPCR, multiplex PCR, digital PCR (dPCR), isothermal amplification techniques (such as loop-mediated isothermal amplification, recombinase polymerase amplification), genotyping methods (including pulsed-field gel electrophoresis, multilocus sequence typing etc.), WGS, melting curve analysis (MCA), and other emerging technologies. The review also discusses the balance between sensitivity and specificity in complex samples, challenges regarding the cost and accessibility of advanced technologies, as well as prospects for future development directions including portable point-of-care testing devices, automated detection equipment. Ongoing optimization of molecular detection technologies will provide critical support for the prevention and control of Salmonella infections.

RevDate: 2025-10-29

Verma R, Das G, Manjunathachar H, et al (2025)

CRISPR-Cas systems: Pioneering next-generation diagnostic tools for parasitic diseases.

Molecular and biochemical parasitology pii:S0166-6851(25)00044-1 [Epub ahead of print].

Parasitic diseases pose significant threats to both human and veterinary health, causing morbidity, mortality, and economic losses. Effective diagnostics are critical, yet conventional methods such as microscopy, serology, and polymerase chain reaction (PCR) are limited by low sensitivity, cross-reactivity, or dependence on costly equipment and skilled personnel. Isothermal amplification techniques, such as loop-mediated isothermal amplification (LAMP) and recombinase polymerase amplification (RPA), have improved point-of-care (POC) applications but remain limited by nonspecific amplification and reduced sensitivity for low-copy targets. Clustered regularly interspaced short palindromic repeats (CRISPR)-associated (Cas) systems have emerged as transformative tools in molecular diagnostics, offering high sensitivity, specificity, rapidity, and cost-effectiveness. This review presents an overview of CRISPR-Cas systems, their historical development, classification (Class 1 and Class 2, Types I-VI), molecular mechanisms, and diagnostic potential in parasitic diseases, with illustrative examples from studies published between 2017 and May 2025. Despite significant progress, CRISPR-based diagnostics face challenges such as off-target activity, dependence on nucleic acid amplification, and complex sample preparation. Future directions focus on amplification-free detection, multiplexed assay development, and integration with nanotechnology, microfluidics, smartphone-based devices, and artificial intelligence. CRISPR-Cas technologies thus represent a promising frontier in next-generation diagnostics for parasitic disease surveillance, control, and personalized healthcare in both human and veterinary health.

RevDate: 2025-10-29

Hong SH, Kim I, Lee G, et al (2025)

Structural and mechanistic investigation of the anti-CRISPR protein AcrIE5 using NMR spectroscopy and AlphaFold modeling.

Biochemical and biophysical research communications, 789:152854 pii:S0006-291X(25)01570-0 [Epub ahead of print].

The CRISPR-Cas system employs RNA-guided endonucleases to protect bacteria and archaea from invading bacteriophages and plasmids. In response, bacteriophages have evolved anti-CRISPR proteins that inhibit diverse types of the CRISPR-Cas system. AcrIE5 was discovered from the mobile genetic elements of Pseudomonas aeruginosa, and potently inhibits the type I-E CRISPR-Cas system of P. aeruginosa. Here, we determined the solution structure of AcrIE5 using NMR spectroscopy, which adopts a novel αβ fold comprising three α-helices and two β-strands. AcrIE5 harbors a mobile loop between the β-strands that is conserved among homologs encoded by MGEs infecting Pseudomonas species, but truncated in homologs from MGEs of other bacteria. AlphaFold correctly reproduced the experimental structure of AcrIE5 and predicted its binding at a cleft formed by Cas8e, Cas7e, and Cas5e within the P. aeruginosa type I-E Cascade. The mobile loop and α-helices of AcrIE5 mediated key interactions with Cas8e at the PAM recognition site, as well as with adjacent Cas7e and Cas5e. AcrIE5 did not bind individual subunits of Cascade with high affinity, suggesting that it recognizes a composite interface of the functional Cascade assembly. Taken together, our findings suggest that AcrIE5 may compete with DNA binding to the PAM recognition site of type I-E Cascade, similar to AcrIE3 and AcrIE4, and also highlight a potential functional role of the conserved mobile loop in host-specific anti-CRISPR activity.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Elliott SD, Ready PJ, Wrinn CM, et al (2025)

A CRISPR activation screen reveals a cilia disassembly pathway mutated in focal cortical dysplasia.

Science advances, 11(44):eaeb7238.

Defective assembly of primary cilia causes ciliopathies, but cilia disassembly and its role in disease remain poorly understood. From a genome-wide CRISPR activation (CRISPRa) screen for negative regulators of ciliary function, we find here that the F2R G protein-coupled receptor, sterile alpha and TIR motif-containing 1 (SARM1) hydrolase, ryanodine receptors, peri-centrosomal calcium signaling, and RhoA form a functional pathway that is necessary and sufficient for cilia disassembly. Highlighting the significance of this pathway, several components are somatically mutated in focal cortical dysplasia (FCD), a neurological disorder characterized by intractable epilepsy. Supporting the functional impact of these variants, patient-derived SARM1 and RhoA mutations potentiate cilia loss, and a RhoA variant impairs cortical development. Conversely, SARM1 inhibition restores cilia in cells with FCD-associated alterations. Together, our work identifies a pathway for cilia disassembly, implicates aberrant pathway activation as a feature of FCD-associated mutations, and illustrates the potential of CRISPRa screening to provide insight into diseases caused by somatic mutations.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Smith SL, Iwamoto Y, Manimaran A, et al (2025)

Harnessing fusion of genome-edited human stem cells to rapidly screen for novel protein functions in vivo.

Molecular biology of the cell, 36(11):ar141.

Genome editing has enabled the integration of fluorescent protein coding sequences into genomes, resulting in expression of in-frame fusion proteins under the control of their natural gene regulatory sequences. While this technique overcomes the well-documented artifacts associated with gene overexpression for biological processes sensitive to altered protein stoichiometry, such as clathrin-mediated endocytosis (CME), editing genomes of metazoan cells incurs a significant time cost compared with simpler organisms, such as yeast. Editing two or more genes to express multiple fluorescent fusion proteins in a single cell line has proven to be a powerful strategy for uncovering spatial dynamic, and therefore functional, relationships among different proteins, but it can take many months to edit each gene within the same cell line. Here, by utilizing cell fusions, we quickly generated cells expressing pairwise permutations of fluorescent fusion proteins in genome-edited human cells to reveal previously undetected protein-organelle interactions. We fused human induced pluripotent stem cells (hiPSCs) that express in-frame fusions of CME and actin cytoskeleton proteins with hiPSCs that express fluorescently tagged organelle markers, uncovering novel interactions between CME proteins, branched actin filament networks, and lysosomes.

RevDate: 2025-10-30
CmpDate: 2025-10-30

Chauhan VP, Sharp PA, R Langer (2025)

Engineered prime editors with minimal genomic errors.

Nature, 646(8087):1254-1260.

Prime editors make programmed genome modifications by writing new sequences into extensions of nicked DNA 3' ends[1]. These edited 3' new strands must displace competing 5' strands to install edits, yet a bias towards retaining the competing 5' strands hinders efficiency and can cause indel errors[2]. Here we discover that nicked end degradation, consistent with competing 5' strand destabilization, can be promoted by Cas9-nickase mutations that relax nick positioning. We exploit this mechanism to engineer efficient prime editors with strikingly low indel errors. Combining this error-suppressing strategy with the latest efficiency-boosting architecture, we design a next-generation prime editor (vPE). Compared with previous editors, vPE features comparable efficiency yet up to 60-fold lower indel errors, enabling edit:indel ratios as high as 543:1.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Du X, Goh PK, Ma C, et al (2025)

Targeting PTPN2 enhances human CAR T cell efficacy and the development of long-term memory in mouse xenograft models.

Science translational medicine, 17(822):eadk0627.

Chimeric antigen receptor (CAR) T cells have been ineffective against solid tumors, where the hostile tumor microenvironment limits CAR T cell function and persistence. Protein tyrosine phosphatase N2 (PTPN2) attenuates T cell receptor and cytokine signaling to maintain T cell tolerance. Here, we used CRISPR-Cas9 gene editing or an inhibitor to target PTPN2 in human CAR T cells specific for the Lewis Y (LeY) neoantigen, which is expressed in most epithelial tumors. Targeting PTPN2 increased CAR and cytokine signaling, including interferon signaling, and enhanced the antigen-induced expansion, activation, and cytotoxicity of anti-LeY CAR T cells in vitro and in vivo. The deletion of PTPN2 in CAR T cells repressed the growth of human tumor and patient-derived xenografts in mice, when compared with unedited CAR T cells, and prolonged mouse survival. The administration of inhibitor also enhanced the ability of α-LeY CAR T cells to repress tumor growth. Cellular indexing of transcriptomes and epitopes by sequencing analysis of splenic PTPN2-deficient CD8[+] CAR T cells in tumor-bearing mice revealed that PTPN2 deficiency favored the generation of CD45RA[+] CAR T cells expressing markers of long-lived stem cell memory (SCM) CAR T cells. Flow cytometric analysis reaffirmed that the deletion or inhibition of PTPN2 promoted the intratumoral accumulation of SCM CD8[+] CAR T cells and the overall persistence of CD8[+] CAR T cells. These data support the use of gene editing or small-molecule inhibitors targeting PTPN2 in human CAR T cells to treat solid tumors.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Bish LM, Fuss JL, DG Panaccione (2025)

Gene editing of the thioester reductase step in the biosynthesis of lysergic acid amides.

PloS one, 20(10):e0334651 pii:PONE-D-25-40361.

Ergot alkaloids derived from lysergic acid are important in agriculture, as food and feed contaminants, and in medicine, as the foundation of several pharmaceuticals. The fungus Metarhizium brunneum makes several lysergic acid amides, with lysergic acid α-hydroxyethylamide (LAH) being produced in by far the highest concentration. The multifunctional enzyme lysergyl peptide synthetase 3 (Lps3) has multiple domains that play important roles in lysergic acid amide synthesis. We hypothesized a role for the reductase domain of Lps3 in liberating LAH from an enzyme-bound precursor and tested this hypothesis with CRISPR/Cas9-based gene editing experiments. We transformed M. brunneum with a Cas9/single guide RNA complex and a donor DNA that replaced the tyrosine at the active site of the reductase domain of Lps3 with a phenylalanine. Sanger sequencing of edited and wild-type genes demonstrated successful editing of the reductase domain without non-target mutations in Lps3. High performance liquid chromatography of the edited strain showed a significant reduction of LAH and accumulation of the precursor lysergic acid. The phenotype was similar when the edited allele of lpsC was in a wild-type background or in backgrounds with late pathway genes easO or easP knocked out, except no LAH was detectable when the edit was in the easO knockout background. The data demonstrate that the reductase domain plays a key role or roles in formation of LAH. The abundant lysergic acid accumulating in the mutants, as opposed to later pathway intermediates in LAH biosynthesis (such as lysergyl-alanine), indicated severe debilitation of Lps3. The data indicate a requirement for the reductase domain of Lps3 in synthesis of lysergic acid amides and demonstrate the feasibility of the CRISPR/Cas9-based approach for editing genes in Metarhizium species.

RevDate: 2025-10-29

Yilmaz Çolak Ç (2025)

Harnessing CRISPR technology for the diagnosis of Bordetella pertussis: advances and implications.

Future microbiology [Epub ahead of print].

Following the discovery of the prokaryotic adaptive immune system known as clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated (Cas) proteins, this technology has revolutionized biotechnology as a multifaceted genome-editing tool with a wide range of applications. CRISPR technology has not only provided novel treatment options, especially for genetic diseases, but also transformed molecular diagnostic platforms. The specific, sensitive, and adaptable nature of the CRISPR-Cas systems has led to the development of innovative solutions for the detection of diseases, including viral and bacterial infections. This review provides an overview of the CRISPR-Cas systems and mainly focuses on the application of CRISPR-based assays for the detection of Bordetella pertussis, which is the main causative agent of a highly infectious disease, whooping cough. The review emphasizes the need for novel diagnostic tools for B. pertussis, along with highlighting some future perspectives, since its diagnosis can be challenging due to nonspecific early symptoms and interference from closely related Bordetella species. In this regard, CRISPR-based diagnostic platforms can offer a promising avenue for rapid and accurate detection of B. pertussis, helping the management of whooping cough.

RevDate: 2025-10-29

Duan Z, Yang R, Lai T, et al (2025)

Development of a CRISPR/Cas9-induced gene editing system for Pseudoalteromonas fuliginea and its applications in functional genomics.

Applied and environmental microbiology [Epub ahead of print].

Pseudoalteromonas has been used as a model system to study cold adaptation and is of widespread interest in biotechnology and ecology. To explore its physiological responses to extreme cold, uncover functional genes, and clarify their ecological roles, efficient genetic tools are essential. However, existing genetic manipulation methods in Pseudoalteromonas rely on traditional homology-based recombination, which is laborious and time-consuming in this bacterial system. Consequently, improving editing efficiency is crucial for advancing both basic research and applied potential. Here, we established a CRISPR/Cas9 system in Pseudoalteromonas and carried out an extensive investigation of the Type II CRISPR/Cas9 platform for gene editing in Pseudoalteromonas fuliginea, a representative species thriving in the frigid polar oceans. To validate the feasibility of the CRISPR/Cas system in P. fuliginea, multiple genes were selected as targets, and the gene editing effects were confirmed through phenotypic changes or gene expression. We have successfully achieved both gene knockouts and insertions in P. fuliginea, encompassing the deletion of genes such as fliJ, indA, and genes encoding Pf sRNAs, as well as the in vivo insertion of 3×FLAG and the gfp gene. The average CRISPR/Cas9 gene editing efficiency in P. fuliginea exceeded 70%. In summary, we developed an efficient CRISPR/Cas9-based editing system in P. fuliginea, which can be utilized to accelerate the development of Pseudoalteromonas as a model system for addressing fundamental questions related to extreme environmental adaptation and to fulfill its potential biotechnological applications.IMPORTANCEPseudoalteromonas fuliginea is a marine bacterium with great potential for ecological and biotechnological research, yet its genetic manipulation has long been a technical challenge. In this study, we developed a gene editing system based on CRISPR technology that enables efficient and precise genome modification in this organism. Using this system, we successfully deleted, inserted, and tagged multiple genes, including regulatory and non-coding elements, with high success rates. Notably, several of these genes are linked to key traits such as motility and stress response, which contribute to microbial adaptation in polar environments. This tool allows researchers to directly test gene function and study microbial adaptation in cold marine environments. The ability to perform reliable genetic edits in P. fuliginea opens new possibilities for its use as a model organism and will support future advances in microbial ecology, environmental microbiology, and marine biotechnology.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Shpiliukova K, Kachanov A, Brezgin S, et al (2025)

m[6]A RNA Modification: Technologies Behind Future Anti-Cancer Therapy.

Molecules (Basel, Switzerland), 30(20): pii:molecules30204091.

N6-methyladenosine (m[6]A) modifications are among the most prevalent epigenetic marks in eukaryotic RNAs, regulating both coding and non-coding RNAs and playing a pivotal role in RNA metabolism. Given their widespread influence, m[6]A modifications are deeply implicated in the pathogenesis of various cancers, including highly aggressive malignancies such as lung cancer, melanoma, and liver cancer. Dysregulation of m[6]A dynamics-marked by an imbalance in methylation and demethylation-can drive tumor progression, enhance metastatic potential, increase aggressiveness, and promote drug resistance, while also exerting context-dependent tumor-suppressive effects. Given this dual role, precise modulation of m[6]A levels and the activity of its regulatory enzymes (writers, erasers, and readers) represent a promising therapeutic avenue. In this review, we highlight recent advances in targeting m[6]A machinery, including small-molecule inhibitors, antisense oligonucleotides, and CRISPR/Cas-based editing tools, capable of both writing and erasing m[6]A marks and altering m[6]A methylation sites per se. By evaluating these strategies, we aim to identify the most effective approaches for restoring physiological m[6]A homeostasis or for strategically manipulating the m[6]A machinery for therapeutic benefit.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Peláez Sánchez RG, González Restrepo J, Pineda S, et al (2025)

Bioinformatic Identification of CRISPR-Cas Systems in Leptospira Genus: An Update on Their Distribution Across 77 Species.

Pathogens (Basel, Switzerland), 14(10): pii:pathogens14101044.

UNLABELLED: Leptospirosis is a globally distributed zoonotic disease caused by pathogenic bacteria of the Leptospira genus. Genome editing in Leptospira has been difficult to perform. Currently, the functionality of the CRISPR-Cas system has been demonstrated in species such as Leptospira interrogans. However, the different CRISPR-Cas systems present in most of the 77 species are unknown. Therefore, the objective of this study was to identify these arrays across the genomes of all described Leptospira species using bioinformatics tools.

METHODS: a bioinformatics workflow was followed: genomes were downloaded from the NCBI database; Cas protein detection was carried out using the CRISPR-CasFinder and RAST web servers; functional analyses of Cas proteins were performed with InterProScan, ProtParam, Swiss Model, Alphafold3, Swiss PDB Viewer, and Pymol; conservation pattern detection was conducted using MEGA12, and Seqlogos; spacer identification was carried out with the Actinobacteriophages database and BLAST version 1.4.0; and bacteriophage detection was performed using PHASTER, and PHASTEST.

RESULTS: Cas proteins were detected in 36 out of the 77 species of the Leptospira species, including Cas1 to Cas9 and Cas12. These proteins were classified into Class 1 and Class 2 systems, corresponding to types I, II, and V. Direct repeats and spacers were detected in 19 species, with the direct repeats exhibiting two conserved nucleotide motifs. Analysis of spacer sequences revealed 323 distinct bacteriophages. Additionally, three intact bacteriophages were detected in the genomes of four Leptospira species. Notably, two saprophytic species have complete CRISPR-Cas systems.

CONCLUSIONS: The presence of Cas proteins, direct repeats, and spacer sequences with homology to bacteriophage genomes provides evidence for a functional CRISPR-Cas system in at least 19 species.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Serrano DR, Juste F, Anaya BJ, et al (2025)

Exosome-Based Drug Delivery: A Next-Generation Platform for Cancer, Infection, Neurological and Immunological Diseases, Gene Therapy and Regenerative Medicine.

Pharmaceutics, 17(10): pii:pharmaceutics17101336.

Exosomes, naturally derived extracellular vesicles, have emerged as powerful bio-nanocarriers in precision medicine. Their endogenous origin, biocompatibility, and ability to encapsulate and deliver diverse therapeutic payloads position them as transformative tools in drug delivery, gene therapy, and regenerative medicine. This review presents a comprehensive analysis of exosome-based therapeutics across multiple biomedical domains, including cancer, neurological and infectious diseases, immune modulation, and tissue repair. Exosomes derived from stem cells, immune cells, or engineered lines can be loaded with small molecules, RNA, or CRISPR-Cas systems, offering highly specific and low-immunogenic alternatives to viral vectors or synthetic nanoparticles. We explore endogenous and exogenous loading strategies, surface functionalization techniques for targeted delivery, and innovations that allow exosomes to traverse physiological barriers such as the blood-brain barrier. Furthermore, exosomes demonstrate immunomodulatory and regenerative properties in autoimmune and degenerative conditions, with promising roles in skin rejuvenation and cosmeceuticals. Despite their potential, challenges remain in large-scale production, cargo loading efficiency, and regulatory translation. Recent clinical trials and industry efforts underscore the accelerating momentum in this field. Exosomes represent a promising platform in precision medicine, though further standardization and validation are required before widespread clinical use. This review offers critical insights into current technologies, therapeutic mechanisms, and future directions to unlock the full translational potential of exosomes in clinical practice.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Honjo A, Yako H, Miyamoto Y, et al (2025)

Knocking Down FRMD4A, a Factor Associated with the Brain Development Disorder and a Risk Factor for Alzheimer's Disease, Using RNA-Targeting CRISPR/Cas13 Reveals Its Role in Cell Morphogenesis.

International journal of molecular sciences, 26(20): pii:ijms262010083.

Genetic truncation or mutation of the gene encoding band 4.1, ezrin, radixin, and moesin (FERM) domain protein containing 4A (FRMD4A) is associated with brain developmental diseases, including microcephaly with global developmental delay. It has also been identified as a risk factor for Alzheimer's disease. By analogy with other FERM domain-containing proteins, FRMD4A is believed to regulate cell morphogenesis and/or cell polarization in central nervous system (CNS) cells; however, it remains unclear whether and how dysfunction of FRMD4A and/or its closely homologous protein FRMD4B causes abnormal morphogenesis in neuronal cells. Here, we describe for the first time the roles of FRMD4A and FRMD4B in process elongation in neuronal cells. Knockdown of Frmd4a or Frmd4b using specific RNA-targeting clustered regularly interspaced short palindromic repeat (CRISPR) and Cas13-fitted gRNAs led to decreased process elongation in primary cortical neurons. Similar decreases in neuronal marker expression were observed in the N1E-115 cell line, a model of neuronal differentiation. Furthermore, hesperetin, an aglycone of the citrus flavonoid hesperidin known to promote neuroprotective signaling, recovered the decreased process elongation induced by the knockdown of Frmd4a or Frm4b. Hesperetin also stimulated phosphorylation of mitogen-activated protein kinases/extracellular signal-regulated kinases (MAPKs/ERKs), which could help promote neuronal processes. These results suggest that FRMD4A and FRMD4B regulate process elongation through a possible signaling pathway linked to the sustained phosphorylation of MAPKs/ERKs. Crucially, this study reveals that, at the molecular and cellular levels, hesperetin can restore normal phenotypes when FRMD4A protein or FRMD4B protein is impaired.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Hossain MM, Sultana F, Mostafa M, et al (2025)

Reinforced Defenses: R-Genes, PTI, and ETI in Modern Wheat Breeding for Blast Resistance.

International journal of molecular sciences, 26(20): pii:ijms262010078.

Wheat blast, caused by Magnaporthe oryzae pathotype Triticum (MoT), poses a major threat to wheat (Triticum aestivum) cultivation, particularly in South America and Bangladesh. The rapid evolution and spread of the pathogen necessitate the development of durable and broad-spectrum resistance in wheat cultivars. This review summarizes current insights into the multi-layered defense mechanisms of wheat, encompassing resistance (R) genes, pattern-triggered immunity (PTI), and effector-triggered immunity (ETI) against MoT. The R-genes provide race-specific resistance through ETI, while both ETI and PTI are required to form integral layers of the plant immune system that synergistically reinforce host defense network. Recent advances in genomics, transcriptomics, and molecular breeding have facilitated the discovery and deployment of key R-genes and signaling components involved in PTI and ETI pathways. Integrating these immune strategies through gene pyramiding, marker-assisted selection (MAS), and genome editing offers a promising route towards enhanced and durable resistance in hosts. Harnessing and optimizing these multilayered immune systems will be pivotal to securing wheat productivity amid the growing threat of wheat blast.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Carbone F (2025)

Special Issue: Latest Research on Plant Genomics and Genome Editing.

International journal of molecular sciences, 26(20): pii:ijms26209946.

Over the past ten years, plant science has undergone a remarkable transformation driven by the convergence of next-generation sequencing, increasingly sophisticated bioinformatics tools, and the rise of targeted genome editing platforms [...].

RevDate: 2025-10-29
CmpDate: 2025-10-29

Zhang H, Yang Y, Yang T, et al (2025)

Engineering a High-Fidelity MAD7 Variant with Enhanced Specificity for Precision Genome Editing via CcdB-Based Bacterial Screening.

Biomolecules, 15(10): pii:biom15101413.

CRISPR (clustered regularly interspaced short palindromic repeats)-Cas (CRISPR-associated protein) nucleases enable precise genome editing, but off-target cleavage remains a critical challenge. Here, we report the development of MAD7_HF, a high-fidelity variant of the MAD7 nuclease engineered through a bacterial screening system leveraging the DNA gyrase-targeting toxic gene ccdB. This system couples survival to efficient on-target cleavage and minimal off-target activity, mimicking the transient action required for high-precision editing. Through iterative selection and sequencing validation, we identified MAD7_HF, harboring three substitutions (R187C, S350T, K1019N) that enhanced discrimination between on- and off-target sites. In Escherichia coli assays, MAD7_HF exhibited a >20-fold reduction in off-target cleavage across multiple mismatch contexts while maintaining on-target efficiency comparable to wild-type MAD7. Structural modeling revealed that these mutations stabilize the guide RNA-DNA hybrid at on-target sites and weaken interactions with mismatched sequences. This work establishes a high-throughput bacterial screening strategy that allows the identification of Cas12a variants with improved specificity at a given target site, providing a useful framework for future efforts to develop precision genome-editing tools.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Nardon E, Azzalini E, Paladin D, et al (2025)

CRISPR/Cas Tools for the Detection of Borrelia sensu lato in Human Samples.

Genes, 16(10): pii:genes16101233.

BACKGROUND/OBJECTIVES: Lyme disease diagnosis remains challenging due to the limitations of current methods. While PCR-based assays are widely used, their sensitivity can be affected by sample type and the inhibition of host DNA. This study aimed to evaluate the feasibility and sensitivity of a CRISPR/Cas12-based detection system for Borrelia burgdorferi sensu lato, comparing its performance with real-time PCR.

METHODS: DNA from three Borrelia genospecies (B. burgdorferi, B. garinii, and B. afzelii) was amplified targeting the OspA gene. Detection was performed using a Cas12/crRNA system with a fluorescent ssDNA reporter. Sensitivity assays were conducted on serial dilutions of Borrelia DNA, with and without human genomic DNA, and results were compared with qPCR.

RESULTS: Direct detection of Borrelia DNA without amplification was not feasible. However, when combined with PCR, the Cas12/crRNA system reliably detected as few as 5 genome copies per reaction. End-point PCR extended to 60 cycles improved detection robustness for B. garinii and B. afzelii, although sensitivity decreased in the presence of human genomic DNA.

CONCLUSIONS: The Cas12/crRNA-based system offers a sensitive and accessible alternative to qPCR, especially in settings lacking real-time PCR instrumentation. Future developments may include integration with isothermal amplification and microfluidic platforms to enhance direct detection capabilities.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Stunf Pukl S (2025)

Genetic Therapy of Fuchs Endothelial Corneal Dystrophy: Where Are We? A Review.

Genes, 16(10): pii:genes16101222.

OBJECTIVES: The incidence of Fuchs endothelial corneal dystrophy (FECD) is growing, and with it, the unmet need for a corneal transplant. Among alternative treatment modalities, only genetic therapy represents a causal therapy.

METHODS: Following the SNARA protocol, the PubMed and ClinicalTrials databases were searched using the keywords Fuchs endothelial corneal dystrophy, FECD, genetic therapy, and CRISPR-Cas9.

RESULTS: FECD is polyfactorial disease and mutations or polymorphisms in at least 15 different genes were connected to the disease. For the early-onset form of the disease, exclusive connection to mutations in COL8A2 was confirmed, while for the late-onset form, the most characteristic mutation is the expansion of the CTG18.1 triplet in the TCF4 gene, making these two possible targets. While the CRISPR-Cas9 approach represents the mainstay of genetic therapy development recently, the application of this method to FECD contains several obstacles, studied in preclinical settings. DT-168 and the Ad-Cas9-Col8a2gRNA molecules were developed for FECD treatment and preclinically tested, and phase I and II clinical studies for DT-168 are also already being performed.

CONCLUSIONS: The review of the literature proved that genetic therapy for FECD is at the level of preclinical research and that there are several specific challenges connected to the target genetic mutation as well as the delivery of possible treatment and duration of the effect. Further studies in the field might bring solutions in the future for alternative treatments for this common corneal disease.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Boti MA, Diamantopoulos MA, A Scorilas (2025)

RNA-Targeting Techniques: A Comparative Analysis of Modern Approaches for RNA Manipulation in Cancer Research and Therapeutics.

Genes, 16(10): pii:genes16101168.

RNA-targeting techniques have emerged as powerful tools in cancer research and therapeutics, offering precise and programmable control over gene expression at the post-transcriptional level. Once viewed as passive intermediates in the central dogma, RNA molecules are now recognized as dynamic regulators of cellular function, capable of influencing transcription, translation, and epigenetic regulation. Advances in high-throughput sequencing technologies, transcriptomics, and structural RNA biology have uncovered a diverse landscape of coding and non-coding RNAs involved in oncogenesis, drug resistance, and tumor progression. In response, several RNA-targeting strategies have been developed to modulate these transcripts, including antisense oligonucleotides (ASOs), RNA interference (RNAi), CRISPR-Cas13 systems, small molecules, and aptamers. This review provides a comparative analysis of these technologies, highlighting their molecular mechanisms, therapeutic potential, and current limitations. Emphasis is placed on the translational progress of RNA-targeting agents, including recent FDA approvals and ongoing clinical trials for cancer indications. Through a critical comparison of these strategies, this review underscores the growing significance of RNA-targeting technologies as a foundation for next-generation cancer therapeutics and precision oncology.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Nemoto A, Imaizumi K, Miya F, et al (2025)

Rescue of imprinted genes by epigenome editing in human cellular models of Prader-Willi syndrome.

Nature communications, 16(1):9442.

Prader-Willi syndrome (PWS) is a genomic imprinting disorder caused by the loss of function of the paternal chromosome 15q11-13, resulting in a spectrum of symptoms associated with hypothalamic dysfunction. PWS patients lack the expression of paternally expressed genes (PEGs) in the 15q11-13 locus but possess an epigenetically silenced set of these genes in the maternal allele. Thus, activation of these silenced genes can serve as a therapeutic target for PWS. Here, we leverage CRISPR-based epigenome editing system to modulate the DNA methylation status of the PWS imprinting control region (PWS-ICR) in induced pluripotent stem cells (iPSCs) derived from PWS patients. Successful demethylation in the PWS-ICR restores the PEG expression from the maternal allele and reorganizes the methylation patterns in other PWS-associated imprinted regions beyond the PWS-ICR. Remarkably, these corrected epigenomic patterns and PEG expression are maintained following the differentiation of these cells into hypothalamic organoids. Finally, the single-cell transcriptomic analysis of epigenome-edited organoids demonstrates a partial restoration of the transcriptomic dysregulation observed in PWS. This study highlights the utility of epigenome editing technology as a therapeutic approach in addressing PWS and potentially other imprinting disorders.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Mishal R, Meléndez-Zajgla J, Rueda-Zarazúa B, et al (2025)

RNA-seq analysis of wild-type and mutated TBPL1 gene in breast cancer cells lines through CRISPR/Cas9 approach reveals novel molecular signatures.

Scientific reports, 15(1):37578.

Breast cancer is the leading cause of death among women globally. Several genes have been found to be transcriptionally dysregulated in cancer, according to recent studies. TATA-box binding protein (TBP) and its two paralogs, TBPL1 and TBPL2, play roles in human transcription. The TBPL1 gene is implicated in colorectal carcinomas by suppressing the expression of miR-18a. However, its function in breast cancer remains undisclosed. TBPL1 is distantly related to TBP and possesses a 40% similarity with TBP's core domain. In the present study, we explored the potential role of the TBPL1 gene in transcriptome regulation by knocking out the TBPL1 gene through the CRISPR/Cas9 method. Following the knockout of the TBPL1 gene, we examined the gene transcription patterns and compared them to wild-type cell lines. We observed disparate signatures of upregulated and downregulated genes in wild-type and mutated conditions. Healthy breast MCF-12F, and T47D, SKBR3, and MDA-MB-231 breast cancer cell lines were assessed, as these cancer cells exhibit overexpression of the TBPL1 gene. Next-generation sequencing data revealed distinct marker genes regulated by the TBPL1 gene and their potential involvement in cell migration, proliferation, anti-apoptosis, and metastasis. Additionally, we also discovered novel lncRNAs implicated in the transcriptome analysis of the TBPL1 knocked-out gene. Our investigation indicated that this gene might affect varied stages of breast cancer cell lines' cellular properties, such as cell duplication, morphology, and growth. It might also contribute to tumor formation in more aggressive cell lines like MDA-MB-231 in vivo.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Song Z, Guo J, Fan Z, et al (2025)

Noncanonical target-strand cytosine base editing via engineered Un1Cas12f1 platform.

Nature communications, 16(1):9499.

CRISPR/Cas-derived base editors harness various deaminase or glycosylase activities to target bases within non-target strand (NTS) of the R-loop, catalyzing base conversions independent of double-strand break formation. To develop miniature BEs compatible with therapeutic viral vectors, we explore the compact Cas12f system. Through computational modeling and mutagenesis, we establish a highly active enUn1Cas12f1 protein, and subsequently construct the derivative cytosine BE (CBE). Remarkably, the engineered CBE exhibits an unexpected activity to also edit the target strand (TS), indicating its substantially expanded editable space. We refine this activity via a focused alanine scan, establishing a nickase-CBE that preferentially install TS edits (TSminiCBE). Further engineering with a non-specific DNA binding domain yields an optimized TS-editing BE that enables in vivo base edits in mice (male). Overall, through extensive engineering of the Cas12f platform and repurposing its intrinsic dynamics, our work establishes a strand-selectable miniature CBE toolkit with strong potential for diverse applications.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Terhalle E, J Rademacher (2025)

[Nontuberculous Mycobacteria: Diagnostic Challenges and Individualized Therapeutic Approaches].

Deutsche medizinische Wochenschrift (1946), 150(22):1360-1366.

Non-tuberculous mycobacteria (NTM) are increasingly recognized as clinically relevant pathogens, particularly in countries with a low tuberculosis incidence. Recent data from Denmark demonstrate a continuous annual rise in NTM-related pulmonary disease (NTM-PD) of 4.6% over 3 decades, with more than half of the isolates associated with true disease. Structural lung diseases such as bronchiectasis, prior tuberculosis, and chronic pulmonary conditions are major risk factors, alongside immunodeficiencies and immunosuppressive therapies. The diagnosis of NTM-PD requires a combination of clinical symptoms, radiological findings, and the microbiological confirmation. Novel diagnostic tools, such as anti-GPL IgA serology and a CRISPR-Cas-based cfDNA assay, show promise for differentiating colonization from disease and monitoring treatment response, but the sputum culture remains essential for species identification and drug susceptibility testing. Treatment is complex and species-specific, with macrolides forming the backbone of most regimens. Refractory cases, particularly those involving Mycobacterium abscessus, pose therapeutic challenges and often require multidisciplinary management. Inhaled liposomal amikacin (ALIS) has shown benefit in refractory MAC disease. Clinical decision-making must balance efficacy, tolerability, and long-term adherence, highlighting the need for individualized treatment strategies and regular monitoring. This review outlines current evidence and practical recommendations for clinicians managing NTM-PD.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Qin Y, Xie J, S Zhen (2025)

CRISPR-Cas12a and DNA Tetrahedron Assemblies Amplified Fluorescence Anisotropy for the Sensitive Detection of Hepatitis B Virus DNA.

Biosensors, 15(10):.

Fluorescence anisotropy (FA) has been widely used for analyzing biomolecules due to its high throughput, homogeneous detection, and strong resistance to photobleaching. However, the traditional FA method suffers from low sensitivity when the target molecules are small and rotate rapidly, often producing insignificant changes in the FA value. In this study, by combining double signal amplification through the trans-cleavage of CRISPR-Cas12a and DNA tetrahedron assemblies with a large molecular size, a new, fast, simple and highly sensitive FA method was constructed to achieve the quantitative detection of hepatitis B virus DNA (HBV-DNA). The experimental results showed that the linear range of this method was 0.5-9 nmol/L, and the detection limit (LOD = 3σ/k) was 48 pmol/L. In addition, the method demonstrated excellent selectivity and anti-interference, and it was successfully applied to detect HBV-DNA in human serum, indicating that this method has the potential for clinical diagnosis.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Zhou Z, Cho IH, US Kadam (2025)

CRISPR-Cas-Based Diagnostics in Biomedicine: Principles, Applications, and Future Trajectories.

Biosensors, 15(10):.

CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats)-Cas (CRISPR-associated) systems, originally identified as prokaryotic adaptive immune mechanisms, have rapidly evolved into powerful tools for molecular diagnostics. Leveraging their precise nucleic acid targeting capabilities, CRISPR diagnostics offer rapid, sensitive, and specific detection solutions for a wide array of targets. This review delves into the fundamental principles of various Cas proteins (e.g., Cas9, Cas12a, Cas13a) and their distinct mechanisms of action (cis- and trans-cleavage). It highlights the diverse applications spanning infectious disease surveillance, cancer biomarker detection, and genetic disorder screening, emphasizing key advantages such as speed, high sensitivity, specificity, portability, and cost-effectiveness, particularly for point-of-care (POC) testing in resource-limited settings. The report also addresses current challenges, including sensitivity limitations without pre-amplification, specificity issues, and complex sample preparation, while exploring promising future trajectories like the integration of artificial intelligence (AI) and the development of universal diagnostic platforms to enhance clinical translation.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Zhu Z, Ma H, Yao H, et al (2025)

CRISPR-Enhanced Colorimetric Aptasensor for Adenosine Triphosphate Detection Based on MoS2-Based Nanozymes.

Biosensors, 15(10):.

As the direct energy source in organisms, accurate and simple detection of adenosine triphosphate (ATP) is of great significance. Herein, a colorimetric aptasensor for ATP determination was designed by integrating the CRISPR/Cas12a system with an aptamer, and with Prussian blue nanocube and gold nanoparticle co-functionalized MoS2 (MoS2-PBNCs-AuNPs) nanozymes. As expected, the introduced CRISPR/Cas12a system and aptamer could efficiently amplify the detection signal and improve the specific recognition ability, respectively. Meanwhile, the catalytic activity of the MoS2-PBNCs-AuNPs nanozymes can be regulated with the concentration of ATP. The high-affinity binding of ATP to the aptamer competitively inhibited aptamer-crRNA hybridization, causing fewer Cas12 proteins to be activated. As a result, the uncleaved single-stranded DNA (ssDNA) adsorbed onto the surface of nanozymes to effectively enhance their catalytic oxidation capability toward 3,3',5,5'-tetramethylbenzidine (TMB). According to this phenomenon, this CRISPR-enhanced colorimetric aptasensor can detect down to 0.14 μM ATP with high selectivity, reproducibility, and stability. In addition, acceptable recoveries and low relative standard deviations of the aptasensor for ATP determination suggest that it is promising for application in early detection of clinical-related diseases.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Liu H, P Zhang (2025)

Advances in β-Thalassemia Gene Therapy: CRISPR/Cas Systems and Delivery Innovations.

Cells, 14(20):.

β-thalassemia is an inherited blood disorder caused by mutations in the β-globin (HBB) gene, leading to reduced or absent β-globin production, resulting in chronic anemia. While current therapies, including blood transfusions and hematopoietic stem cell transplantation, offer symptomatic relief, they are limited by complications and their limited accessibility. CRISPR-based gene editing technologies provide new therapeutic avenues by enabling the precise correction of HBB mutations or the reactivation of fetal hemoglobin (HbF) through the targeting of regulatory elements such as BCL11A. These approaches have shown promising preclinical and clinical outcomes. However, efficient and safe delivery remains a major challenge. Viral vectors offer high efficiency but raise concerns about immunogenicity and insertional mutagenesis, whereas non-viral systems such as lipid nanoparticles and engineered exosomes offer lower toxicity and modularity but face targeting limitations. This review highlights recent progress in CRISPR-based therapies for β-thalassemia and emerging delivery strategies to enhance clinical translation.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Charlier J, Sherkatghanad Z, V Makarenkov (2025)

Similarity-based transfer learning with deep learning networks for accurate CRISPR-Cas9 off-target prediction.

PLoS computational biology, 21(10):e1013606 pii:PCOMPBIOL-D-25-01030.

Transfer learning has emerged as a powerful tool for enhancing predictive accuracy in complex tasks, particularly in scenarios where data is limited or imbalanced. This study explores the use of similarity-based pre-evaluation as a methodology to identify optimal source datasets for transfer learning, addressing the dual challenge of efficient source-target dataset pairing and off-target prediction in CRISPR-Cas9, while existing transfer learning applications in the field of gene editing often lack a principled method for source dataset selection. We use cosine, Euclidean, and Manhattan distances to evaluate similarity between the source and target datasets used in our transfer learning experiments. Four deep learning network architectures, i.e. Multilayer Perceptron (MLP), Convolutional Neural Networks (CNNs), Feedforward Neural Networks (FNNs), and Recurrent Neural Networks (RNNs), and two traditional machine learning models, i.e. Logistic Regression (LR) and Random Forest (RF), were tested and compared in our simulations. The results suggest that similarity scores are reliable indicators for pre-selecting source datasets in CRISPR-Cas9 transfer learning experiments, with cosine distance proving to be a more effective dataset comparison metric than either Euclidean or Manhattan distances. An RNN-GRU, a 5-layer FNN, and two MLP variants provided the best overall prediction results in our simulations. By integrating similarity-based source pre-selection with machine learning outcomes, we propose a dual-layered framework that not only streamlines the transfer learning process but also significantly improves off-target prediction accuracy. The code and data used in this study are freely available at: https://github.com/dagrate/transferlearning_offtargets.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Ye T, Xue M, Xu Y, et al (2025)

Inverted Tetrahedral DNA Reporters Enable Label-Free Ratiometric CRISPR Electrochemical Aptasensing of Kanamycin.

Journal of agricultural and food chemistry, 73(43):27694-27702.

Integrating CRISPR technology with electrochemical sensing has promising potential in point-of-care testing applications. However, inappropriate immobilization of the reporter on the heterogeneous surface leads to a poor trans-cleavage efficiency. Additionally, the accuracy and reliability of electrochemical sensing still face challenges. Herein, an inverted tetrahedral DNA reporter was developed for electrochemical CRISPR aptasensing. Thiol-modified single-strand oligonucleotides were self-assembled on the edge of tetrahedral DNA nanostructures (TDNs) as a scaffold, enabling an inverted immobilization of DNA tetrahedra via the Au-S bond. The trans-cleavage activity of CRISPR/Cas12a on the single-stranded oligonucleotides resulted in the TDNs dissociating from the electrode surface. The recovery of electron transfer of potassium ferricyanide on the electrode enhances the electrochemical response, while the signal of adsorbed methylene blue on the skeleton of TDNs decreases, enabling a ratiometric signal output. As a proof of concept, the proposed inverted tetrahedral DNA reporters were employed to develop a label-free ratiometric electrochemical aptasensing method for kanamycin detection. Under the optimal conditions, as low as 0.35 pM kanamycin was detected in 50 min with a 4 orders of magnitude dynamic range from 1 pM to 10 nM. Furthermore, the practical application ability of the proposed method for kanamycin detection in a spiked milk sample was also demonstrated. This work offers a new perspective for electrochemical CRISPR sensing development.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Sun Y, Hong Z, Wang W, et al (2025)

Establishment of an efficient and versatile genome editing platform for L. ruthenicum.

Plant physiology, 199(2):.

Black goji berry (Lycium ruthenicum Murr.) is a valuable functional food and traditional medicinal plant owing to its rich content of anthocyanins, trace minerals, vitamins, and polysaccharides. However, limited genetic manipulation tools have hindered functional genomic studies and trait improvement in this species. In this study, we optimized the genetic transformation system for L. ruthenicum, achieving a remarkably high transformation efficiency of 95.4%. Based on this system, we developed a clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9)-mediated gene knockout approach, using the Arabidopsis U6 (AtU6) promoter to drive sgRNA expression and the cauliflower mosaic virus 35S (35S) promoter to drive Cas9 expression, achieving editing efficiencies of 68.8% at the phytoene desaturase (LrPDS) locus and 96.0% at the betaine aldehyde dehydrogenase (LrBADH2) locus. Furthermore, we established an adenine base editing (ABE) system using the ribosomal protein subunit 5A (RPS5A) promoter to drive tRNA adenine deaminase-8e (TadA-8e-nSpCas9) cassette expression, achieving an editing efficiency of 72.2% at the LrPDS locus. To broaden protospacer adjacent motif (PAM) compatibility, we introduced the PAM-relaxed variant SpRY, enabling successful A-to-G editing at an acetolactate synthase (LrALS) target site containing a noncanonical NAN PAM, with an efficiency of 5.3%. Additionally, we developed a multiplex ABE system based on the tRNA-processing strategy, which enabled simultaneous editing at 2 independent loci with an efficiency of 33.3%. Our study establishes a robust genome editing toolkit for L. ruthenicum, offering valuable tools for functional gene analysis and molecular breeding in this economically important species.

RevDate: 2025-10-29
CmpDate: 2025-10-29

Zhou L, Li X, Ji Z, et al (2025)

Generation of Ext1 Gene-Edited Mice Model Via Dual sgRNAs/Cas9 System and Phenotypic Analyses.

Molecular biotechnology, 67(11):4233-4246.

Hereditary multiple exostoses (HME) is an autosomal dominant skeletal disease. Genetic linkage analyses have identified that mutations in the exostosin glycosyltransferase (EXT)1 and EXT2 genes are linked to HME pathogenesis, with EXT1 mutation being the most frequent. The aim of this study was to generate a mice model with Ext1 gene editing to simulate human EXT1 mutation and investigate the genetic pathogenicity of Ext1 through phenotypic analyses. We designed a pair of dual sgRNAs targeting exon 1 of the mice Ext1 gene for precise deletion of a 46 bp DNA fragment, resulting in frameshift mutation of the Ext1 gene. The designed dual sgRNAs and Cas9 proteins were injected into mice zygotes cytoplasm. A total of 14 mice were obtained via embryo transfer, among which two genotypic chimera mice had a deletion of the 46 bp DNA fragment in exon 1 of the Ext1 gene. By hybridization and breeding, we successfully generated heterozygous mice with edited Ext1 gene (Ext[+/-]). Off-target effect analysis did not reveal off-target mutations in Ext[+/-] mice caused by the two sgRNAs used. Compared to wild-type mice, Ext[+/-] mice exhibited lower body weights. X-ray imaging showed hyperplastic bone near caudal vertebrae only in male Ext[+/-] mice, with computed tomography values approximately at 200 HU for hyperplastic bone between ribs and spine regions. Furthermore, immunohistochemical analysis revealed fewer articular chondrocytes expressing EXT1 in edited mice compared to wild-type ones. Pathological section analysis demonstrated no structural or morphological abnormalities in heart, liver, lung, or kidney tissues from Ext[+/-] mice. In conclusion, we successfully generated an accurate DNA deletion model for studying Ext1 using dual sgRNAs/Cas9 systems. In conclusion, we successfully generated precise DNA deletions in the Ext1 mice model using the dual sgRNAs/Cas9 system. In conclusion, we observed significant phenotypic changes in Ext[+/-] mice, particularly bone hyperplasia in male individuals; however, no exostosis was detected in the gene-edited mice. The introduction of a frameshift mutation into the Ext1 gene through CRISPR/Cas9 technology resulted in novel phenotypic alterations, highlighting the genetic pathogenicity of Ext1. Therefore, our Ext[+/-] mice serve as a valuable model for further biomedical investigations related to the Ext1 gene.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Nass NM, KA Zaher (2025)

Beyond the Resistome: Molecular Insights, Emerging Therapies, and Environmental Drivers of Antibiotic Resistance.

Antibiotics (Basel, Switzerland), 14(10): pii:antibiotics14100995.

Antibiotic resistance remains one of the most formidable challenges to modern medicine, threatening to outpace therapeutic innovation and undermine decades of clinical progress. While resistance was once viewed narrowly as a clinical phenomenon, it is now understood as the outcome of complex ecological and molecular interactions that span soil, water, agriculture, animals, and humans. Environmental reservoirs act as silent incubators of resistance genes, with horizontal gene transfer and stress-induced mutagenesis fueling their evolution and dissemination. At the molecular level, advances in genomics, structural biology, and systems microbiology have revealed intricate networks involving plasmid-mediated resistance, efflux pump regulation, integron dynamics, and CRISPR-Cas interactions, providing new insights into the adaptability of pathogens. Simultaneously, the environmental dimensions of resistance, from wastewater treatment plants and aquaculture to airborne dissemination, highlight the urgency of adopting a One Health framework. Yet, alongside this growing threat, novel therapeutic avenues are emerging. Innovative β-lactamase inhibitors, bacteriophage-based therapies, engineered lysins, antimicrobial peptides, and CRISPR-driven antimicrobials are redefining what constitutes an "antibiotic" in the twenty-first century. Furthermore, artificial intelligence and machine learning now accelerate drug discovery and resistance prediction, raising the possibility of precision-guided antimicrobial stewardship. This review synthesizes molecular insights, environmental drivers, and therapeutic innovations to present a comprehensive landscape of antibiotic resistance. By bridging ecological microbiology, molecular biology, and translational medicine, it outlines a roadmap for surveillance, prevention, and drug development while emphasizing the need for integrative policies to safeguard global health.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Tripathi A, Vishwakarma K, Tripathi S, et al (2025)

Utilization of MADS-Box genes for agricultural advancement: current insights and future prospects.

Molecular biology reports, 53(1):20.

MADS-box genes constitute a highly conserved family of transcription factors integral to the regulation of a diverse array of plant developmental processes, encompassing floral organ specification, fruit maturation, root architecture and adaptation to abiotic stresses. These transcription factors encode proteins containing the distinctive MADS (MCM1, AGAMOUS, DEFICIENS, and SRF) domain, which mediates DNA binding and orchestrates interaction with co-regulators, thereby enabling the precise transcriptional control of developmental gene networks. Functional characterization through transgenic approaches including overexpression, knockdown, and CRISPR/Cas9-based mutagenesis-has revealed the capacity of MADS-box gene manipulation to modulate key agronomic traits, such as yield potential, as well as resilience to salinity, drought, and temperature fluctuations. In rice, targeted editing of OsMADS18 using CRISPR/Cas9 generated a substantial quantitative variation in tiller and panicle number, demonstrating the direct contribution of MADS-box gene function to biomass and yield performance. Similarly, CRISPR/Cas9-mediated disruption of the RIPENING INHIBITOR (RIN) gene in tomato (Solanum lycopersicum) underscored its central role in regulating fruit ripening, linking MADS-box gene activity to postharvest quality and development. Phylogenomic studies reveal strong conservation of MADS-box gene lineages in monocot grasses, as evidenced by clustered short internal branches, whereas eudicots, particularly Solanaceae present well-differentiated subclades, reflecting lineage-specific diversification events. Notably, network analysis highlight the high connectivity and central regulatory position of many MADS-box proteins, underlining their roles as master integrators of developmental and environmental signalling involved in both floral and vegetative transitions. A mechanistic understanding of these regulatory circuits offers translational opportunities to engineer crops with improved performance and resilience, reinforcing the pivotal role of MADS-box genes in crop improvement.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Baars J, Kurm V, Scholten B, et al (2025)

On site discrimination between two closely related commercial strains of oyster mushroom using a loop-mediated isothermal amplification (LAMP) test.

Molecular biology reports, 53(1):17.

BACKGROUND: Protection of the intellectual property (IP) rights on new crop varieties is important as it allows the breeding company or entity that produced the variety to earn back (part of) the investment. Infringement on the IP rights of mushroom varieties is not uncommon. In order to combat infringement of the IP rights on two strains of Oyster mushroom (SPOPPO and ALLERPO) it is important to be able to readily recognize and discriminate the two strains in commercial practice. This article describes the development of tools for the on-site identification of two closely related sporeless strains of Oyster mushroom.

METHODS AND RESULTS: To develop a reliable method of discriminating between SPOPPO and ALLERPO, we used either the LAMP technique or a modification of that technique. It allows for fast (within 30 min) identification of the commercially used strains SPOPPO and ALLERPO with high specificity. Fast on-site answers on strain identity can be important when experiencing unexpected strain behavior or when strains are of suspect origin. Both strains are discriminated from sporulating strains by a LAMP reaction on the intact version of the msh4 gene; sporeless strains contain a msh4 gene with a large insert that renders the associated protein inactive.

CONCLUSIONS: SPOPPO and ALLERPO are distinguished from each other and other commercially used Pleurotus ostreatus strains by LAMP reactions that target genomic regions with strain specific recombinations. To our knowledge, this is the first time LAMP reactions have been developed to discriminate between Pleurotus ostreatus strains.

RevDate: 2025-10-27

Monteiro Belo Dos Santos S, Van Tricht C, Lammertyn J, et al (2025)

Zoonotic disease detection at the point-of-care: the best of RPA and CRISPR-Cas.

Biosensors & bioelectronics, 293:118139 pii:S0956-5663(25)01016-4 [Epub ahead of print].

Biosensors are increasingly crucial in detecting biomarkers for emerging zoonotic diseases at the point-of-care (POC). This imminence was recently highlighted by the deficient response during the SARS-CoV-2 pandemic. While polymerase chain reaction (PCR) is the common nucleic acid (NA) testing method for zoonotic diseases in laboratory settings, it is impractical for the POC settings due to the equipment-related cost, lack of portability and user-friendliness. Recent advances in NA amplification introduced isothermal methods, such as recombinase polymerase amplification (RPA), which is known for its low temperature (37-42 °C), short incubation time (5-20 min) and suitability for integration in miniaturized, portable, low-cost, highly sensitive diagnostic platforms. However, RPA susceptibility to false positive results steered to its combination with CRISPR-Cas12/13, leading to the rise of SHERLOCK and DETECTR. This review first explores RPA-CRISPR-Cas bioassay development as either two- or one-step. This is followed by a discussion on the integration of canonical RPA, or its combination with CRISPR-Cas, into different diagnostic platforms towards NA amplification at the POC (e.g., mobile laboratories, centrifugal, or pump-free platforms). Finally, the advantages, limitations, and outlook for POC-based diagnostics of zoonotic diseases with RPA(-CRISPR-Cas) are discussed, highlighting the need for innovative technologies to address global health challenges. While promising, many of these approaches still require further research to achieve streamlined, single-step reactions and seamless integration into diagnostic platforms. Moreover, despite two decades of RPA(-CRISPR-Cas) development, technology readiness is limited, still missing validated platforms, integrated sample preparation, and AI-powered results analysis enabling real time epidemiological monitoring.

RevDate: 2025-10-27
CmpDate: 2025-10-27

Shaw S, Sateriale A, Pawlowic MC, et al (2026)

Genetic Manipulation of Cryptosporidium parvum.

Methods in molecular biology (Clifton, N.J.), 2978:173-185.

Cryptosporidium parvum can be reliably genetically manipulated using CRISPR/Cas9 driven homologous repair coupled to in vivo propagation in immunodeficient mice. This chapter will guide through foundational procedures for excystation, transfection, infection, collection, and purification of transgenic Cryptosporidium parvum. The genetic tools for Cryptosporidium research were expanded significantly over the last 5 years. While we cannot cover all advances in detail, we will highlight novel selection markers, conditional mutagenesis strategies, and genetic crosses.

RevDate: 2025-10-27
CmpDate: 2025-10-27

Mohiuddin M (2025)

Monitoring and Assessment of Circulating Tumor DNA in Cancers Using Ultrarapid Sensitivity as an Innovative Practice.

Health science reports, 8(10):e71409.

BACKGROUND: Liquid biopsy with circulating tumor DNA (ctDNA) has rapidly emerged as a new paradigm for assessing tumor burden, genetic heterogeneity, and therapeutic response in a real-time, noninvasive manner. However, ctDNA is often visually low (sometimes < 0.1% of the total circulating cell-free DNA), creating a significant challenge for reliable detection (especially for early-stage disease and minimal residual disease).

DISCUSSION: New technologies for structural variant (SV)-based ctDNA assays, nanomaterial-based electrochemical sensors, magnetic nano-electrode platforms, and fragment-enriched library preparation have improved sensitivity to attomolar concentrations and less in some populations. In some cancers, ctDNA may provide early evidence of recurrence (i.e., > 1 year) before being clinically evident using traditional metrics. These technologies allow for unprecedented opportunities and sensitivity for early detection, monitoring of treatment response, and early detection of molecular recurrence. Nevertheless, a barrier remains for widespread clinical application owing to pre-analytical technique variability, analytical platform variability, cost, and the necessity of large-scale, prospective trials.

CONCLUSION: This study will analyze new innovative technology-based ultrasensitive ctDNA assay detection and future research and clinical applications for breast, colorectal, lung, lymphoid, and gastroesophageal cancers, and studies assessing ctDNA for monitoring treatment. Prospects for ctDNA detection utilizing multiplexed CRISPR-Cas ctDNA assays, microfluidic point-of-care (POC) devices, and AI-based error suppression methods may be the next horizon for ctDNA liquid biopsy technology.

RevDate: 2025-10-27
CmpDate: 2025-10-27

Wang T, Yu M, Liu P, et al (2026)

In vivo gene therapy: A strategy for mutations, degenerations, and tumors.

Genes & diseases, 13(1):101808.

Gene mutations, organ function degeneration, and carcinogenesis are the primary threats to human health. Gene therapy, which involves the addition, deletion, regulation, and editing of genes, as well as the development of genetic vaccines, can potentially cure genetic mutation disorders, degenerative diseases, and cancers. Ex vivo gene therapy has recently been used to treat monogenetic mutation diseases of the hematopoietic system and cancers. However, in vivo gene therapy remains inapplicable. The primary elements of in vivo gene therapy include deoxyribonucleic acid (DNA) nucleases (e.g., zinc finger nucleases, transcription activator-like effector nucleases), CRISPR-Cas system, base editors, prime editors, and delivery vectors (e.g., viral and non-viral vehicles). According to the development of DNA nucleases and delivery vectors, in vivo gene therapy can be made available for future clinical use. The current review summarizes the development of DNA nucleases and delivery vectors for in vivo gene therapy, emphasizing recent progress.

RevDate: 2025-10-26
CmpDate: 2025-10-26

Wei H, Li D, Xie K, et al (2025)

Creation of new rice germplasm with cross-resistance to auxin herbicides picloram and dicamba by genome editing of OsAFB4.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 138(11):282.

Genome Editing of OsAFB4 in rice cultivar Jiahe212 confers cross-resistance to synthetic auxin herbicides picloram and dicamba without reducing grain yield, providing a novel germplasm for herbicide-resistant rice breeding. Synthetic auxin herbicides (SAHs) are widely employed in global agriculture owing to low toxicity and high efficiency in weed management. Mutations in OsAFB4, an AUXIN SIGNALING F-BOX gene, led to specific resistance to SAH picloram in rice. However, potential application of OsAFB4 modification for resistance to other SAHs and its effect on agronomic traits in rice remain uncharacterized. In this study, we employed CRISPR/Cas9-mediated genome editing to generate OsAFB4 mutations in the elite commercial rice cultivar Jiahe212 (JH212). Hydroponic-culture experiments showed that Osafb4 mutant lines exhibited significant resistance to both SAHs: picloram and dicamba. Promoter activity assays using a pOsAFB4:GUS reporter line revealed that SAH treatments induced significant upregulation of GUS expression specifically in shoot apices. Under picloram or dicamba treatment, expressions of OsIAA1, OsIAA3, OsIAA9 and OsIAA20 were significantly upregulated in wild-type plants, while remarkably suppressed in Osafb4 mutants, revealing a critical role for OsAFB4 in regulating auxin-responsive IAA genes during OsAFB4-mediated sensitivity to SAH. Selected for field trials, the Cas9-free Osafb4-13 mutant line exhibited robust resistance to both picloram and dicamba without reducing grain yield compared to untreated controls. This study provides a new cross-herbicide-resistant rice germplasm without reducing grain yield by targeted editing of OsAFB4.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Li X, Ma J, Luo Y, et al (2025)

Enhancing Performance in Electrochemical Early Diagnosis of African Swine Fever Based on CRISPR-Responsive DNA Nanoflowers.

Analytical chemistry, 97(42):23401-23408.

Accurate, ultrasensitive, and fast detection of the African swine fever virus (ASFV) can efficiently prevent its spread and reduce the losses. Herein, an electrochemical biosensor was designed for high-performance detection of ASFV DNA by coupling with CRISPR technology and signal amplification technology. Porous DNA nanoflowers (DNFs) were prepared by rolling circle amplification (RCA), which was preconjugated Cas12a-crRNA complex to improve detection sensitivity, shorten detection time, and simplify detection steps. In the presence of ASFV DNA, the trans-cleavage activity of Cas12a was activated, degrading DNFs into DNA fragments and causing a significant electrochemical signal change. Combined with the CRISPR-Cas12a system, the detection limit of the DNF-amplified biosensor (3.57 aM) is 3 orders of magnitude lower than that of the conventional RCA-amplified biosensor (2.90 fM). Moreover, the designed electrochemical biosensor showed excellent reproducibility, storage stability, and practical analysis ability, suggesting that it has a promising application in the early diagnosis of African swine fever (ASF).

RevDate: 2025-10-28
CmpDate: 2025-10-28

Gao Z, Yang X, Ren X, et al (2025)

Ultrasensitive Detection of m[6] A-Modified RNA Using CRISPR/Cas12a-Integrated Iontronic Biosensor with Hydrophobized Nanochannels: Toward Early Cancer Diagnosis by Machine Learning.

Analytical chemistry, 97(42):23609-23621.

N[6] -methyladenosine (m[6] A), the most prevalent internal modification in eukaryotic RNAs, has emerged as a focal point of intensive research in recent years owing to its pivotal regulatory roles in carcinogenesis, progression, and metastasis. However, conventional methods for site-specific detection of m[6] A modifications are plagued by operational complexity, pose challenges for quantitative assessment of methylation levels, and exhibit elevated false-positive rates, severely limiting their utility in clinical and mechanistic studies. In this study, we engineered an ultrasensitive iontronic biosensor leveraging a hydrophobized anodic aluminum oxide (AAO) nanochannel platform, synergistically integrating the precise target recognition capability of the CRISPR/Cas12a system with the efficient signal amplification of the clamped hybridization chain reaction (CHCR). This integration enables ultrasensitive and specific detection of m[6] A-modified RNA with a low detection limit of 32 aM. Validation experiments targeting MALAT1 and HOTAIR lncRNAs demonstrated that the sensor achieves exceptional specificity in qualitative analysis of m[6] A modifications. Furthermore, combinatorial detection of these two lncRNAs enables robust discrimination between cancer patients and healthy individuals. Through in-depth mining of latent data patterns via machine learning, the random forest (RF) model yielded a cancer diagnostic accuracy of 96.7%. This study establishes a novel and potent paradigm for early cancer diagnosis, with far-reaching implications for epitranscriptomic research and clinical translation.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Wang X, Feng S, Chen H, et al (2025)

Development of an Aptamer/CRISPR-Cas12a-Based Dual-Modal Biosensor for Fusobacterium nucleatum Detection in Non-Invasive Colorectal Cancer Screening.

Analytical chemistry, 97(42):23360-23369.

Colorectal cancer (CRC) is the third most common cancer and leading cause of cancer-related deaths worldwide. However, current CRC screening methods are complex, invasive, and tend to exhibit low sensitivity. Recent evidence has highlighted gut microbiota dysbiosis, especially elevated Fusobacterium nucleatum levels, as a promising biomarker for CRC. In this study, a sensitive and specific detection platform was developed for F. nucleatum by combining a highly specific aptamer with rolling circle amplification (RCA) and the CRISPR/Cas12a technology. The aptamer enables specific target recognition, while RCA amplifies the target signal, and the Cas12a-mediated cleavage of a fluorescence-quenching substrate generates a quantifiable fluorescence or grayscale signal. Using a microplate reader, this assay achieved a limit of detection (LOD) of 3.68 CFU/mL; furthermore, by incorporating smartphone-assisted ImageJ grayscale analysis, it elevated the LOD to 4.30 CFU/mL, thereby enabling a dual-mode output along with on-site applicability. Additionally, the strong correlation between the two signals allowed for mutual validation. Upon application to clinical fecal samples, the developed method sensitively distinguished CRC patients from healthy controls, and its results correlated with the quantitative polymerase chain reaction results. This triple-synergistic platform, integrating aptamer specificity, RCA amplification, and CRISPR/Cas12a sensitivity, enables the noninvasive, ultrasensitive detection of F. nucleatum, supporting early CRC screening, prognosis monitoring, and microbiome-targeted therapy. Moreover, this approach overcomes the challenges of detecting low-abundance bacteria in early stage CRC and advances the precision of microbiome-based diagnostics for CRC.

RevDate: 2025-10-28
CmpDate: 2025-10-28

Hu Y, Yan H, Zhang Y, et al (2025)

In-Field Molecular Diagnostics of Plant Pathogens Using Bioluminescent CRISPR-Guided Caspase Assay.

Angewandte Chemie (International ed. in English), 64(44):e202508870.

In-field molecular diagnostics of plant pathogens are critical for crop disease management and precision agriculture, but tools are still lacking. Herein, we present a bioluminescent molecular diagnostic assay capable of detecting viable pathogens directly in minimally processed plant samples, enabling rapid and precise in-field crop disease diagnosis. The assay, called bioluminescent craspase diagnostics (BioCrastics), leverages newly discovered RNA-activated protease of CRISPR (Craspase) with enzymatic luminescence to generate a cascaded amplification, thus bypasses nucleic acid purification and amplification while achieving sub-nanogram sensitivity for fungal pathogens. Using wheat stripe rust as a proof of concept, we demonstrate direct pathogen detection in crude leaf homogenates within 40 min, early identification of infections 6 days prior to symptom emergence. Notably, the assay, via targeting pathogenic RNAs, specifically quantifies viable fungi, overcoming false positives from dead pathogens-a limitation of PCR-based methods that impairs disease risk assessment. Featuring simplified sample processing, portable detection, and species-specific accuracy, BioCrastics establishes a field-deployable tool that bridges the gap between laboratory-level precision and on-farm diagnostic needs for crop disease management.

RevDate: 2025-10-25

Afresham S, Khan MK, Mughal MAS, et al (2025)

Recent Advancements in the Diagnosis of Parasitic Diseases.

Molecular and biochemical parasitology pii:S0166-6851(25)00042-8 [Epub ahead of print].

Parasitic infections present a significant health risk to the public, affecting millions of people, particularly in underdeveloped and developing countries. In developing countries, these infections are also responsible for causing significant economic challenges due to elevated healthcare expenditure. Accurate diagnosis and effective treatment methods are essentially required to combat this global issue. For decades, traditional diagnostic methods such as microscopy, serological testing, histopathology, and culturing have been used for the diagnosis of these parasitic infections. While these methods can be effective and helpful in many ways, they often consume a lot of time, require an elevated level of expertise, and have limited applications particularly in endemic regions having issues like poor infrastructure and limited access to healthcare facilities. This review aims to highlight the urgent need for a revolution to replace these conventional techniques with more affordable, quick, and field-adjustable tools such as rapid diagnostic tests (RDTs) and molecular methods and provides a comprehensive picture of advanced diagnostic tools used in the identification of parasites. With the advancements in science and technology, molecular methods such as Polymerase chain reaction, Next generation sequencing, and isothermal loop-mediated amplification have remarkably enhanced the sensitivity and accuracy of parasite detection and identification. The range of these diagnostic methods has further extended by advanced serological methods, imaging techniques, and immunological methods. Moreover, the innovations in nanotechnology, CRISPR-Cas methods, and multi-omics techniques for identification of parasite DNA, antigens, metabolites, and host responses are invaluable for diagnostic accuracy, comprehensive understanding of parasite biology, and for the discovery of new therapeutic targets and diagnostic biomarkers. However, further research and developments are required for an effective and long-lasting impact of these advancements.

RevDate: 2025-10-25
CmpDate: 2025-10-25

Hodge CA, Donegan NP, Armstrong DA, et al (2025)

Enhanced cleavage of genomic CCR5 using CASX2[Max].

RNA biology, 22(1):1-18.

Development of novel CRISPR/Cas systems enhances opportunities for gene editing to treat infectious diseases, cancer, and genetic disorders. CasX2 (PlmCas12e) belongs to the class II CRISPR system derived from Planctomycetes, a non-pathogenic bacterium present in aquatic and terrestrial soils and offers several advantages as a potential therapeutic CRISPR system over Streptococcus pyogenes Cas9 (SpCas9) and Staphylococcus aureus Cas9 (SaCas9). These advantages include its smaller size, distinct protospacer adjacent motif (PAM) requirements, staggered cleavage cuts that promote homology-directed repair, and the absence of pre-existing immunity in humans. We compared the cleavage efficiency and double-stranded break repair characteristics between CasX2 and CasX2[Max], a recently generated CasX2 variant with three amino acid substitutions, for targeting CCR5, a gene that encodes the CCR5 receptor important for HIV-1 infection. Two single guide RNAs (sgRNAs) were designed that flank the 32 bases deleted in the natural CCR5 ∆32 mutation. Nanopore sequencing demonstrated that CasX2 using sgRNAs with spacers of 17 nucleotides (nt), 20 nt or 23 nt in length were ineffective at cleaving genomic CCR5. In contrast, CasX2[Max] using sgRNAs with 20 nt and 23 nt spacer lengths, enabled cleavage of genomic CCR5. Structural modelling indicated that two of the CasX2[Max] amino acid substitutions enhanced sgRNA-DNA duplex stability, while the third improved DNA strand alignment within the catalytic site. These structural changes likely underlie the increased activity of CasX2[Max] in cellular gene excision. In sum, CasX2[Max] consistently outperformed native CasX2 across all assays and represents a superior gene-editing platform for therapeutic applications.

RevDate: 2025-10-25

Kang YW, HH Park (2025)

The anti-CRISPR protein AcrIE8.1 inhibits the type I-E CRISPR-Cas system by directly binding to the Cascade subunit Cas11.

FEBS letters [Epub ahead of print].

CRISPR-Cas systems provide adaptive immunity to bacteria by recognizing and destroying foreign genetic elements. The type I-E CRISPR-Cas system utilizes a multi-subunit Cascade complex to detect target DNA and recruit the Cas3 nuclease for degradation. To overcome this defense, bacteriophages have evolved anti-CRISPR (Acr) proteins that inhibit various steps of the CRISPR interference pathway. Here, we determined the crystal structure of AcrIE8.1, an uncharacterized Acr, revealing it binds to Cas11, a Cascade subunit, to disrupt function. AcrIE8.1 has a compact fold with a defined Cas11-binding interface, suggesting a unique inhibitory mechanism among AcrIE proteins. These findings highlight Cas11 as a critical target for Acr-mediated immune evasion. Impact statement Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR-Cas system. This represents a novel inhibitory strategy not previously observed among AcrIE proteins.

RevDate: 2025-10-25

Lee SY, HH Park (2025)

Investigating the molecular mechanisms underlying the anti-CRISPR function of AcrIIA13b protein.

The FEBS journal [Epub ahead of print].

The CRISPR-Cas systems of adaptive immunity in bacteria and archaea provide resistance against phages and other mobile genetic elements. Counteractive anti-CRISPR (Acr) proteins in phages and archaeal viruses impede these CRISPR-Cas systems. Although CRISPR-Cas systems have revolutionized genome editing, potential off-target events remain a safety concern. Hence, a thorough comprehension of the structural and molecular basis of diverse Acrs is imperative to unravel the fundamental mechanisms governing CRISPR-Cas regulation. Here, we present the structure of AcrIIA13b from Staphylococcus haemolyticus and analyze its structural and functional features to reveal the molecular basis underlying the inhibition of Cas9 by AcrIIA13b. Our structural analysis shows that AcrIIA13b eliminates the cleavage activity of Staphylococcus aureus Cas9 (SauCas9) by blocking the PAM-binding region of Cas9 so that Cas9 cannot recognize the target DNA. In addition, we demonstrate that the 15 amino acid residues at the N terminus of AcrIIA13b, which were revealed to be important for its dimerization, are critical for its inhibitory activity against Cas9. Our findings shed light on the molecular basis of AcrIIA13b-mediated CRISPR-Cas inhibition and provide valuable insights into the arms race between bacteria and phages.

RevDate: 2025-10-27

Liu H, Zhu G, Chen L, et al (2025)

Machine learning prediction of bacterial optimal growth temperature from protein domain signatures reveals thermoadaptation mechanisms.

BMC genomics, 26(1):957.

UNLABELLED: Cultivating the vast majority of uncultured microbes requires knowledge of their physiological preferences, particularly optimal growth temperature (OGT). We present a machine learning approach that utilizes protein domain frequencies from bacterial genomes to predict OGT across a wide continuous range (1–83 °C). Our Random Forest model, trained on a dataset of 1,498 genomes, achieved high predictive accuracy (R[2]=0.853 on test data, 82.4% of predictions within a ± 10 °C error margin), substantially advancing current capabilities and offering a practical tool to guide cultivation experiments. Analysis of the model identified key protein domain signatures associated with thermal adaptation. The enrichment of domains related to polyamine metabolism, the tRNA methyltransferase family, and CRISPR-Cas systems was positively correlated with higher OGTs, providing genomic evidence for their roles in thermotolerance. Conversely, domains involved in redox homeostasis, transport, and nucleic acid binding were more abundant at lower temperatures. These findings not only facilitate targeted cultivation efforts but also deepen our understanding of the molecular strategies bacteria employ to thrive across diverse thermal niches.

SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12864-025-12162-z.

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RJR Experience and Expertise

Researcher

Robbins holds BS, MS, and PhD degrees in the life sciences. He served as a tenured faculty member in the Zoology and Biological Science departments at Michigan State University. He is currently exploring the intersection between genomics, microbial ecology, and biodiversity — an area that promises to transform our understanding of the biosphere.

Educator

Robbins has extensive experience in college-level education: At MSU he taught introductory biology, genetics, and population genetics. At JHU, he was an instructor for a special course on biological database design. At FHCRC, he team-taught a graduate-level course on the history of genetics. At Bellevue College he taught medical informatics.

Administrator

Robbins has been involved in science administration at both the federal and the institutional levels. At NSF he was a program officer for database activities in the life sciences, at DOE he was a program officer for information infrastructure in the human genome project. At the Fred Hutchinson Cancer Research Center, he served as a vice president for fifteen years.

Technologist

Robbins has been involved with information technology since writing his first Fortran program as a college student. At NSF he was the first program officer for database activities in the life sciences. At JHU he held an appointment in the CS department and served as director of the informatics core for the Genome Data Base. At the FHCRC he was VP for Information Technology.

Publisher

While still at Michigan State, Robbins started his first publishing venture, founding a small company that addressed the short-run publishing needs of instructors in very large undergraduate classes. For more than 20 years, Robbins has been operating The Electronic Scholarly Publishing Project, a web site dedicated to the digital publishing of critical works in science, especially classical genetics.

Speaker

Robbins is well-known for his speaking abilities and is often called upon to provide keynote or plenary addresses at international meetings. For example, in July, 2012, he gave a well-received keynote address at the Global Biodiversity Informatics Congress, sponsored by GBIF and held in Copenhagen. The slides from that talk can be seen HERE.

Facilitator

Robbins is a skilled meeting facilitator. He prefers a participatory approach, with part of the meeting involving dynamic breakout groups, created by the participants in real time: (1) individuals propose breakout groups; (2) everyone signs up for one (or more) groups; (3) the groups with the most interested parties then meet, with reports from each group presented and discussed in a subsequent plenary session.

Designer

Robbins has been engaged with photography and design since the 1960s, when he worked for a professional photography laboratory. He now prefers digital photography and tools for their precision and reproducibility. He designed his first web site more than 20 years ago and he personally designed and implemented this web site. He engages in graphic design as a hobby.

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CRISPR-Cas

By delivering the Cas9 nuclease, complexed with a synthetic guide RNA (gRNA) into a cell, the cell's genome can be precisely cut at any desired location, allowing existing genes to be removed and/or new ones added. That is, the CRISPR-Cas system provides a tool for the cut-and-paste editing of genomes. Welcome to the brave new world of genome editing. R. Robbins

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Collection of publications by R J Robbins

Reprints and preprints of publications, slide presentations, instructional materials, and data compilations written or prepared by Robert Robbins. Most papers deal with computational biology, genome informatics, using information technology to support biomedical research, and related matters.

Research Gate page for R J Robbins

ResearchGate is a social networking site for scientists and researchers to share papers, ask and answer questions, and find collaborators. According to a study by Nature and an article in Times Higher Education , it is the largest academic social network in terms of active users.

Curriculum Vitae for R J Robbins

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