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Bibliography on: CRISPR-Cas

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ESP: PubMed Auto Bibliography 11 Jun 2025 at 01:44 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: 2025-06-04
CmpDate: 2025-06-04

Cai Y, Zhao P, Wu F, et al (2025)

Inhibition of NR2F2 restores hormone therapy response to endocrine refractory breast cancers.

Science translational medicine, 17(801):eadk7786.

Endocrine resistance is frequently encountered in estrogen receptor-positive (ER+) breast cancer, often because of somatic mutations such as neurofibromin 1 (NF1) loss. The mechanisms by which ER-directed proliferation is lost in such cases are unknown, limiting the potential use of additional endocrine treatments. Here, we performed CRISPR-Cas9 knockout (KO) screens and found that nuclear receptor subfamily 2 group F member 2 (NR2F2), an orphan nuclear receptor, was essential for NF1 loss-induced endocrine resistance. Induction of NR2F2 was observed in ER+ cell line models and patient samples and occurred via activation of the mitogen-activated protein kinase (MAPK) pathway upon NF1 loss or other MAPK pathway genetic alterations. Mechanistically, increased NR2F2 orchestrated a repressed ER transcriptional program by repartitioning the ER cistrome, altering the balance of its associated transcriptional coregulators, and modifying global chromatin accessibility. Accordingly, genetic depletion or pharmacologic inhibition of NR2F2 restored sensitivity to hormone therapies in multiple models, including ER+ cell lines, patient-derived xenografts, and patient-derived organoid-based xenografts harboring diverse endocrine-resistance mechanisms such as NF1, AT-rich interactive domain-containing protein 1A (ARID1A), phoshatase and tensin homolog (PTEN) loss, or Kirsten rat sarcoma virus (KRAS) overexpression. Together, these findings underscore NR2F2 as a critical modulator of the hormone response pathway and suggest its inhibition as a promising strategy to overcome endocrine resistance in breast cancer.

RevDate: 2025-06-07

Jin Y, Liang X, X Wang (2025)

Alternative splicing in stem cells and development: research progress and emerging technologies.

Cell regeneration (London, England), 14(1):20.

Alternative splicing is a key regulatory mechanism that generates transcriptomic diversity by selectively splicing pre-RNA molecules in different ways, leading to the production of multiple RNA isoforms from a single gene. This process is crucial for the fine-tuning of gene expression and is tightly regulated during various biological processes. Recent studies have highlighted how alternative splicing contributes to stem cells self-renewal and differentiation, as well as how dysregulation of splicing factors can impact stem cells behavior and lead to developmental abnormalities or diseases. This review summarizes the current understanding of alternative splicing in stem cells and development, focusing on the molecular mechanisms that govern alternative splicing regulation, the role of splicing factors, and the impact of splicing isoforms on stem cell fate determination and developmental processes. We also discuss emerging technologies, such as CRISPR/Cas-based tools, single-cell long-read RNA sequencing, imaging technologies and 3D culture systems, which are advancing our ability to study alternative splicing in vitro and in vivo. Overall, this field is rapidly evolving, revealing new insights into how alternative splicing shapes the molecular landscape and functions of stem cells and developmental processes.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Waqas MAB, Awan MJA, Amin I, et al (2025)

Engineering high yield basmati rice by editing multiple negative regulators of yield.

Molecular biology reports, 52(1):545.

BACKGROUND: Yield improvement in Basmati rice is important to meet the growing demand of Basmati and pivotal to world food security. Yield in rice is a complex quantitative trait controlled by many genes and yield-determining factors. Although dominant genes introgression through breeding have been extensively used but it is a laborious and time-consuming process. Yield genes OsD27, OsGW2, OsTGW6 and OsGN1a have been shown to negatively regulate an increase in the number of tillers, grain width, grain weight, and number of grains per panicle respectively in different genetic backgrounds of rice separately. The aim of our study is to establish a multiplex system in Super Basmati to check if it acts similarly and what is their combinatorial effect on yield enhancement.

METHODS: Here we generated Super Basmati quadruple edited lines for all four genes OsD27, OsGW2, OsTGW6 and OsGN1a through CRISPR-Cas9 polycistronic tRNA-gRNA (PTG) endogenous processing efficient multiplex editing system. Quadruple edited lines were characterized for key yield parameters such as number of tillers, number of grains, grain weight, overall yield increase, lodging resistance and cooking quality related traits.

RESULTS: We found that all quadruple edited plants produced more tillers, a greater number of grains with high grain weight in field evaluations along with decreased plant height. Overall, the contribution of all four genes was additive resulting in boosting the yield in Super Basmati remarkably. Our data hence demonstrated a promising multiplex genome editing approach for rapid generation of superior alleles for all four yield contributing factor genes in elite Basmati variety with 30% co-editing efficiency.

CONCLUSIONS: We conclude that multiplex CRISPR-Cas9 genome editing of yield-negative regulators may boost the yield of elite Basmati rice in a short time without causing any drastic effect on other agronomic and quality traits such as aroma, chalkiness, and cooking qualities. Data suggests that the tRNA-gRNA multiplexing CRISPR-Cas9 system is efficient in the Basmati rice background for simultaneously editing multiple genes. Due to its capability of rapid generation of beneficial alleles, this multiplex system is well suited for pyramiding of multiple alleles in Basmati rice and may prove a promising approach to enhance yield in Basmati rice while it may provide useful germplasm resource for high-yielding future rice breeding programs.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Sharma SS, Pandey A, Kashyap A, et al (2025)

CRISPR/Cas9: efficient and emerging scope for Brassica crop improvement.

Planta, 262(1):14.

CRISPR/Cas9 revolutionizes Brassica crop improvement by enhancing yield, quality, and stress resistance, providing a precise and versatile tool for genetic and agronomic advancements. The rapidly advancing CRISPR/Cas9 (Clustered regularly interspaced short palindromic repeats/CRISPR associated protein 9) technologies are being employed in both diploid and polyploid species of Brassica for gene functions and precise genetic improvements. CRISPR/Cas technology has sparked significant attention among the scientific community due to its affordability, precision, and effectiveness compared to other genome editing techniques. The recent discoveries highlight the diverse applications of the CRISPR/Cas9 genome editing tool in enhancing agriculturally important traits in Brassica species. This technology has been utilized to improve yield, quality, and resistance to both biotic and abiotic stresses globally. Here, we present an overview that encourages researchers to explore and improve the functionality and genetic progress of Brassica U-triangle species utilizing genome editing technologies. In addition, ethical considerations and concerns associated with CRISPR technologies are addressed, providing valuable insight into how CRISPR/Cas9 tools and have revolutionized crop improvement with special emphasis on Brassica for various agronomically and nutritionally important traits.

RevDate: 2025-06-09

Liu Y, Zhang S, C Hu (2025)

Cas7 meets Cas14: a strategic partnership in the type VII CRISPR-Cas.

Protein & cell, 16(2):79-82.

RevDate: 2025-06-06
CmpDate: 2025-06-03

Yang C, Fang Q, Li M, et al (2025)

Prime editor with rational design and AI-driven optimization for reverse editing window and enhanced fidelity.

Nature communications, 16(1):5144.

Prime editing (PE) is a precise tool for introducing genetic mutations in eukaryotes. Extending the efficient editing scope and mitigating undesired byproducts are possible. We introduce reverse PE (rPE), a SpCas9-directed variant that enabled DNA editing at the 3' direction of HNH-mediated nick site. The rPE leveraging nCas9-D10A and rPE gRNA targeting the 5' direction of HNH-mediated nick site inscribes genetic alterations, achieving a reverse editing window and potentially high fidelity. HNH and reverse transcriptase engineered using protein language models in conjunction with La facilitate circular erPEmax and erPE7max, achieving editing efficiency up to 44.41% without nick gRNA or positive selection. Furthermore, our findings underscore the capability of rPE in inserting functionally enhanced variant (PIK3CD[E527G]) for cell therapy. By expanding the editing scope and enhancing genomic manipulability, rPE represents a meaningful advancement in prime editing, improving its utility for research and therapeutic applications.

RevDate: 2025-06-09
CmpDate: 2025-06-03

Esser SP, Turzynski V, Plewka J, et al (2025)

Differential Expression of Core Metabolic Functions in Candidatus Altiarchaeum Inhabiting Distinct Subsurface Ecosystems.

Environmental microbiology reports, 17(3):e70096.

Candidatus Altiarchaea are widespread across aquatic subsurface ecosystems and possess a highly conserved core genome, yet adaptations of this core genome to different biotic and abiotic factors based on gene expression remain unknown. Here, we investigated the metatranscriptome of two Ca. Altiarchaeum populations that thrive in two substantially different subsurface ecosystems. In Crystal Geyser, a high-CO2 groundwater system in the USA, Ca. Altiarchaeum crystalense co-occurs with the symbiont Ca. Huberiarchaeum crystalense, while in the Muehlbacher sulfidic spring in Germany, an artesian spring high in sulfide concentration, Ca. A. hamiconexum is heavily infected with viruses. We here mapped metatranscriptome reads against their genomes to analyse the in situ expression profile of their core genomes. Out of 537 shared gene clusters, 331 were functionally annotated and 130 differed significantly in expression between the two sites. Main differences were related to genes involved in cell defence like CRISPR-Cas, virus defence, replication, transcription and energy and carbon metabolism. Our results demonstrate that altiarchaeal populations in the subsurface are likely adapted to their environment while influenced by other biological entities that tamper with their core metabolism. We consequently posit that viruses and symbiotic interactions can be major energy sinks for organisms in the deep biosphere.

RevDate: 2025-06-03
CmpDate: 2025-06-03

Jiang W, Wang S, Ahlheit D, et al (2025)

High-throughput metabolic engineering of Yarrowia lipolytica through gene expression tuning.

Proceedings of the National Academy of Sciences of the United States of America, 122(23):e2426686122.

The challenge of accurately predicting which genetic alternations lead to the desired phenotype necessitates high-throughput metabolic engineering approaches where numerous hypotheses can be tested simultaneously. We describe the CRISPR-Cas9-based method TUNE[YALI] that enables high-throughput tuning of gene expression in the common industrial yeast Yarrowia lipolytica. The method is based on replacing the promoters of the target genes with native Y. lipolytica promoters of varying strengths or removing the promoters entirely. To demonstrate the method's capabilities, we created a plasmid library that targets 56 transcription factors (TFs) and changes the expression of each TF to seven different levels. We transformed this library into reference and betanin-producing strains of Y. lipolytica and screened the resulting clones for changes in morphology, thermotolerance, or improved betanin production. The genetic markup of the yeast clones with the desired phenotypic changes was determined by sequencing the inserted plasmids. We identified multiple TFs whose regulatory changes increased thermotolerance, two TFs that eliminated pseudohyphal growth, and several TFs that increased betanin production. Analogous libraries can be designed to target any chosen group of genes and even all the genes. The libraries can be shared and reused, accelerating applied strain development projects and fundamental functional genomics research (TUNE[YALI]-TF kit and TUNE[YALI]-TF library are available via AddGene under catalog numbers #1000000255 and #217744).

RevDate: 2025-06-10
CmpDate: 2025-06-10

Shi K, Zhang Y, Tao Y, et al (2025)

Preamplification-Free Detection of RNA N6-Methyladenosine Modification at Single-Base Resolution Using the CRISPR Tandem Assay.

Analytical chemistry, 97(22):11454-11461.

N6-Methyladenosine (m[6]A) ranks among the most prevalent modifications in RNA, which serves as a biomarker for diseases, such as lung cancer. Herein, we developed a CRISPR/Cas13a-Csm6 tandem assay (termed CRISPRm[6]A assay) allowing for preamplification-free, sensitive, and rapid detection of RNA m[6]A modifications. The coupling of Cas13a-Csm6 tandem with MazF endoribonuclease enables the assay to identify m[6]A RNA with single-base resolution. Compared to the CRISPRm[6]A assay using Cas13a alone, the tandem CRISPRm[6]A assay yielded an improved sensitivity for RNA detection by ∼22 times, thus enabling preamplification-free detection of RNA m[6]A. Particularly, the proposed assay enabled quantification of m[6]A abundance down to 0.5% at the picomole level in lncRNA MALAT1 and demonstrated a 100% correlation in diagnosing nonsmall cell lung cancer. In summary, the CRISPRm[6]A assay supports two key applications in biological samples: (1) precise determination of m[6]A sites and (2) quantitative measurement of m[6]A fractions. Therefore, the CRISPR tandem method presents a promising tool for RNA epigenetics-based diagnostics.

RevDate: 2025-06-10
CmpDate: 2025-06-10

Wang X, Zhong L, Zhang W, et al (2025)

CRISPR Digital Sensing: From Micronano-Collaborative Chip to Biomolecular Detection.

ACS nano, 19(22):20427-20451.

The Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) sensing technology proved to be valuable during the COVID-19 pandemic through its sensitivity, specificity, robustness, and versatility. However, issues such as overreliance on amplification, susceptibility to false positives, lack of quantification strategies, and complex operation procedures have hindered its broader application in bioanalysis and clinical diagnostics. The collision between micronano-collaborative chips and CRISPR technology has effectively addressed these bottlenecks, offering innovative solutions for diagnosis and treatment. Unlike conventional micronano chips, micronano digital chips enhance CRISPR's response to trace amounts of target molecules by leveraging highly controllable local environments and compartmentalized microreactors. This advancement improves detection efficiency and revolutionizes traditional in vitro bioanalytical processes. First, the working principles, fabrication techniques, and performance metrics of CRISPR-based digital droplet microfluidics and microarray chips are examined. Then, the applications of CRISPR digital sensing chips in bioassays are reviewed, emphasizing their importance in advancing in vitro detection systems for gene editing. Finally, the prospects of CRISPR digital sensing technology are explored, particularly its potential for body surface biomonitoring and its broader development opportunities in the biomedical field.

RevDate: 2025-06-10
CmpDate: 2025-06-10

Zhang C, Chen Y, Chen X, et al (2025)

Single nanoparticle analysis-based CRISPR/Cas12 bioassay for amplification-free HIV detection.

Chemical communications (Cambridge, England), 61(48):8759-8762.

To reduce the "window period" in HIV detection, most analytical methods require additional enzymes for signal amplification. Exempting challenges like primer interference and false positives in amplification strategies, we developed an amplification-free bioassay that uses CRISPR's potent cleavage activity and the competent sensitivity of single-nanoparticle analysis. An attomolar detection limit was achieved with adequate selectivity. Serum and cell tests confirm the bioassay's accurate and sensitive HIV detection.

RevDate: 2025-06-10
CmpDate: 2025-06-10

Chen Y, Yu K, Jiang Z, et al (2025)

CRISPR-based genetically modified scaffold-free biomaterials for tissue engineering and regenerative medicine.

Biomaterials science, 13(12):3149-3175.

CRISPR-based genetically modified scaffold-free biomaterials, including extracellular vehicles, cell sheets, cell aggregates, organoids and organs, have attracted significant attention in the fields of regenerative medicine and tissue engineering in recent years. With a wide range of applications in gene therapy, modeling disease, tissue regeneration, organ xenotransplantation, modeling organogenesis as well as gene and drug screening, they are at a critical juncture from clinical trials to therapeutic applications. Xenografts have already been tested on non-human primates and humans. However, we have to admit that a series of obstacles still need to be addressed, such as immune response, viral infection, off-target effects, difficulty in mass production, and ethical issues. Therefore, future research should pay more attention to improving their safety, accuracy of gene editing, flexibility of production, and ethical rationality. This review summarizes various types of CRISPR-based genetically modified scaffold-free biomaterials, including their preparation procedures, applications, and possible improvements.

RevDate: 2025-06-10
CmpDate: 2025-06-10

Yang Q, Zhang Y, Chen L, et al (2025)

Isolation, pathogenicity, and an infectious cDNA clone of the prevalent G2c variant of porcine epidemic diarrhea virus in China.

Microbial pathogenesis, 205:107637.

Porcine epidemic diarrhea virus (PEDV) is a major enteric coronavirus causing diarrhea in piglets, and the recent prevalence of its G2c variant poses a significant threat to the pig industry in China. In this study, we successfully isolated a G2c variant strain (designated EHuB4) from a pig farm experiencing an outbreak of severe diarrhea in China, and constructed its full-length cDNA infectious clone using CRISPR/Cas9 technology. The parental EHuB4 strain and its rescued virus, rEHuB4, exhibited similar biological characteristics in Vero cells, including rapid cytopathic effects and the formation of large syncytia, suggesting strong cell fusion ability and replication efficiency. Pathogenicity experiments in piglets demonstrated that both EHuB4 and rEHuB4 caused severe diarrhea and mortality, further confirming that the prevalence of the G2c variant may be the primary reason for the current high incidence of PED outbreaks. We also analyzed the mutation frequency and variation tendency in the amino acids encoded by the EHuB4 Spike (S) gene and identified multiple high-frequency mutation sites located not only in the S1 subunit but also in the intermediate region between heptad repeat 1 (HR1) and HR2. Furthermore, these mutations have persisted since 2011 and may be closely related to virus prevalence, host adaptation, and pathogenicity. In summary, this study not only characterizes the genetic evolution and pathogenicity of the prevalent G2c strain but also provides a valuable molecular tool for developing novel vaccines through the established full-length cDNA infectious clone.

RevDate: 2025-06-03

Wu JL, Zheng SS, Wang L, et al (2025)

CRISPR-Cas System-Mediated Genetic Modification in Bacillus spp.: Current Status and Future.

Journal of agricultural and food chemistry [Epub ahead of print].

Bacillus spp. are a group of Gram-positive bacteria that have shown significant potential for development in recent years. It is capable of utilizing low-cost substrates to produce various high-value-added compounds, making it widely applicable in fields such as feed, pharmaceuticals, and food. The clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated (Cas) system-mediated genetic modification is recognized as one of the most efficient technologies. The application of this technology for the genetic improvement of Bacillus spp. greatly enhanced the production performance of these strains. In this review, we summarize the various CRISPR-Cas systems that have been applied to Bacillus spp., with a particular focus on systematically outlining the strategies for implementing CRISPR-Cas-mediated genetic modification in these bacteria. Notably, homologous recombination is the most widely used strategy, while base editing is emerging as a novel and precise approach. Additionally, we discuss the importance of expression regulation strategies in establishing Bacillus spp. as a cell factory. Finally, we propose potential solutions to current technical challenges, providing insights for the development of high-performance genetically modified Bacillus spp. production strains.

RevDate: 2025-06-03
CmpDate: 2025-06-03

Keerthana R, Rakshana P, Salunkhe SR, et al (2025)

CRISPR-Cas9 mediated enhancement of abiotic stress resilience in tomato: a comprehensive review of target genes.

Molecular biology reports, 52(1):538.

Tomato (Solanum lycopersicum L.), a major vegetable crop grown worldwide, is consumed as both fresh and processed products. Concerns about the impact of abiotic stresses on tomato production are growing worldwide as climate change alters global weather patterns, adversely affecting crop yield and produce quality due to stresses like salt, heat, cold, and drought. Conventional breeding approaches such as hybridization, marker-assisted selection (MAS), and mutation breeding, have long been utilized to improve tomato resilience against abiotic stresses. These approaches are often hampered by extensive field trials, and require multiple generations limiting their efficiency in rapidly developing stress-tolerant cultivars. The efforts of traditional breeding systems are hindered by the narrow genetic base of tomatoes which poses a major bottleneck. Researchers have utilized CRISPR-Cas genome-editing technology to address this challenge to offer a precise and accelerated alternative for enhancing stress resilience in tomato. This versatile tool has gained attention for its simple, precise, and effective gene-editing capabilities. CRISPR-Cas based genome editing has successfully modified key genes related to stress-response pathways, enhancing abiotic stress resilience. Developing resistant cultivars help mitigate the impact of abiotic stress, thereby contributing to increased food production and food security. This review highlights recent progress in use of CRISPR-Cas9 gene editing to enhance tomato resilience to abiotic stresses.

RevDate: 2025-06-03
CmpDate: 2025-06-03

Lakhani H, Kumar N, Jangra A, et al (2025)

Streamlined protoplast transfection system for in-vivo validation and transgene-free genome editing in Banana.

Transgenic research, 34(1):28.

The advancement in the CRISPR/Cas system has significantly streamlined genome editing in plants, rendering it simple, reliable, and efficient. However, the development of transgene-free crops is a challenging task for vegetatively propagated plants like banana. In the present study, we established banana protoplasts-based versatile and efficient platform for genome editing to overcome this limitation. Herein, a protocol has been optimized for protoplast isolation by considering leaf and embryogenic cell suspension (ECS) of banana cultivar Grand Naine. Freshly prepared ECS was identified as the best source for protoplast isolation. The protoplast viability and competency were checked by transfection with plasmid and RNP complex. Polyethylene glycol (PEG)-mediated protoplast transfection using pCAMBIA1302 and pJL50TRBO vectors showed GFP expression with 30 and 70% efficiency, respectively, eventually proving the protocol's efficacy. Further, gRNAs targeting banana β-carotene hydroxylase gene are validated by in-vitro cleavage test and subsequently used for RNP complex formation with varied ratios (1:1, 1:2, 1:5, and 1:10) of SpCas9 to gRNA1. Among these, a 1:2 molar ratio proved best to generate indel frequency with 7%. Sequencing analysis of the target amplicon revealed mutations upstream of the PAM region, specifically with gRNA1, among the three in-vitro validated gRNAs. This study evaluated the effectiveness of gRNAs in-vitro and in-vivo, yielding inconsistent results that highlight the need for comprehensive in-vivo validation of their functionality. Conclusively, the optimized protocol for banana transfection has the potential to be harnessed for the generation of transgene-free genetically improved banana.

RevDate: 2025-06-05
CmpDate: 2025-06-03

Zhang T, Meng Z, Yu H, et al (2025)

An integrated multi-mode detection platform based on CRISPR/Cas 12a and aptamers for ultra-sensitive identification of sulfamethazine and genes associated with sulfonamide resistance.

Journal of nanobiotechnology, 23(1):408.

The production and buildup of sulfamethazine (SMZ) and resistance genes for sulfonamide antibiotics (sul1) pose a serious risk to environmental and public health safety. Creating advanced sensing systems that are both highly sensitive and selective for the prolonged observation of SMZ concentrations in the environment, along with the quantification of sul1 gene prevalence, aims to identify trends in resistance, posing a considerable challenge. Here, we devised a platform (SMZ-sul1 multi-mode detection platform) that allows for the fluorescence detection of SMZ in environmental samples. This is achieved through the competition for the aptamer between the complementary base and SMZ, along with the colorimetric, photothermal, and electrochemical tracking of sul1, using a magnetic separation unit (FP@cDNA). MOF-818@PtPd (MPP) nanozymes with high peroxide mimetic enzyme activity were linked to FP@cDNA through Zr-O-P bond and employed as a catalyst for the 3,3',5,5'-tetramethylbenzidine (TMB) oxidation, as well as for electrocatalytic hydrogen peroxide (H2O2) reduction. The ability of Cas12a to perform trans cleavage was activated by its precise identification of the sul1, leading to the non-selective cutting of single-stranded DNA (ssDNA). Thereafter, the MPP nanoparticles were released into the supernatant, where they catalyzed the oxidation of TMB. Alternatively, the functioning CRISPR/Cas12a system specifically targeted and cleaved ssDNA present on the electrode, resulting in altered loading of MPP nanozymes and a decrease in the current associated with the catalytic reduction of H2O2. The remarkable magnetic separation capabilities of FP@cDNA, combined with the superior target recognition features of CRISPR/Cas12a and aptamer, facilitated the creation of a highly sensitive detection system, achieving detection limits of 0.67 pM for SMZ and 7.6 fM for sul1, and exhibit great potential for monitoring and prediction in the field of public health.

RevDate: 2025-06-05
CmpDate: 2025-06-02

Hong D, Shu M, Liu J, et al (2025)

Divergent combinations of enhancers encode spatial gene expression.

Nature communications, 16(1):5091.

Spatial transcriptomics and epigenomics have enabled mapping gene regulation in the tissue context. However, it remains poorly understood how spatial gene expression patterns are orchestrated by enhancers. Here we build eSpatial, a computational framework that deciphers spatially resolved enhancer regulation of gene expression by integrating spatial profiles of gene expression and chromatin accessibility. Applying eSpatial to diverse spatial datasets, including mouse embryo and brain, as well as human melanoma and breast cancer, we reveal a "spatial enhancer code", in which divergent combinations of enhancers regulate the same gene in spatially segregated domains. We validate the spatial enhancer code using public spatial datasets such as VISTA, Allen in situ hybridization (ISH), and H3K27ac MERFISH. Moreover, we conduct transgenic reporter assays and in vivo CRISPR/Cas9-mediated perturbation experiments to confirm the Atoh1 spatial enhancer code in determining Atoh1 spatial expression in mouse embryonic spinal cord and brain. Our study establishes the spatial enhancer code concept, revealing how combinations of enhancers dynamically shape gene expression across diverse biological contexts, providing insights into tissue-specific regulatory mechanisms and tumor heterogeneity.

RevDate: 2025-06-09
CmpDate: 2025-06-09

Nair A, Rao AS, Surabhi MA, et al (2025)

Unravelling fungal pathogenesis: Advances in CRISPR-Cas9 for understanding virulence and adaptation.

Fungal genetics and biology : FG & B, 179:104006.

Fungi, with their billion-year evolutionary history, have adapted to diverse ecological niches, including pathogenic roles that threaten global health, agriculture, and ecosystems. Fungal pathogenicity is shaped by the dynamic evolution of genetic traits that enable fungi to infect hosts, evade immune defenses, and develop resistance to antifungal treatments. Despite their significant clinical and ecological impact, the evolutionary processes underlying fungal virulence and adaptation remain incompletely understood. This review emphasizes the transformative role of CRISPR-Cas9 genome editing in revealing these mechanisms. By allowing precise manipulation of fungal genomes, CRISPR technologies have provided key insights into virulence factors, stress response mechanisms, immune evasion, and antifungal resistance pathways. These advances demonstrate how fungi adapt to selective pressures, repurpose conserved genetic pathways, and exploit genomic plasticity to thrive in host environments. This review explores the intersection of CRISPR technology and fungal biology, shedding light on its implications for understanding fungal pathogenesis and the potential to develop innovative therapeutic strategies against fungal infections. The integration of CRISPR applications into mycology holds promise for furthering our understanding of fungal evolutionary trajectories and enhancing the development of novel therapeutic approaches.

RevDate: 2025-06-09
CmpDate: 2025-06-09

Liu Y, Liu Y, Wu S, et al (2025)

Engineered Cas12a-based one-tube detection of DNMT3A R882 H/C mutation in acute myeloid leukemia.

Biosensors & bioelectronics, 286:117609.

Advances in sequencing technologies have identified numerous genetic alterations associated with acute myeloid leukemia (AML), many of which play critical roles in diagnosis, classification, and prognosis. Among these, mutations in the DNA methyltransferase 3 alpha (DNMT3A) gene are particularly prevalent, with the R882H and R882C variants being the most common. Accurate and sensitive detection of DNMT3A mutations is crucial for prognosis, treatment guidance, and early intervention in AML. However, existing detection methods often fail to achieve an optimal balance among sensitivity, turnaround time, and operational simplicity. To address this limitation, we aimed to develop a rapid and highly sensitive method for detecting DNMT3A mutations. The CRISPR/Cas12a system shows promise for genetic detection due to its high sensitivity and single-base specificity. Here, we established a Cas12a-based one-tube assay for the detection of DNMT3A R882 H/C mutations. We utilized the mismatch tolerance of enAsU-R Cas12a to design crRNA for DNMT3A R882 H/C mutation and integrated CRISPR/Cas12a system with ERA. The entire detection process can be completed within 1 h at 37 °C. The optimized detection system demonstrated a sensitivity of 0.1 % when analyzing genomic DNA. To validate its clinical applicability, we tested samples from 49 AML patients and successfully identified all DNMT3A R882H/C-positive cases, including one with a mutation rate as low as 0.24 %. These results highlight the potential of our Cas12a-based one-tube detection system as a rapid, sensitive, and cost-effective method for detecting DNMT3A R882 H/C mutation. This approach could serve as a valuable tool for both diagnostic and therapeutic monitoring.

RevDate: 2025-06-09
CmpDate: 2025-06-09

Li M, Tao C, Tang Z, et al (2025)

Ultrasensitive clinical identification of hepatitis B surface antigen (HBsAg) by CRISPR-assisted nanopore sensing.

Biosensors & bioelectronics, 286:117579.

Hepatitis B virus (HBV) infection is a major global health issue. The underdiagnosis of HBV contributes to the increasing mortality from hepatitis B-related complications. Hepatitis B surface antigen is a biomarker guiding the clinical management of chronic hepatitis B, and its disappearance from the blood is a key sign of functional cure. There is a need for highly sensitive detection methods for early intervention and prevention of disease recurrence. We presented a new CRISPR-assisted nanopore sensing method for ultrasensitive detection of hepatitis B surface antigen. It uses the high specificity and turnover efficiency of the CRISPR-Cas12a system. The system is activated by the competitive binding between hepatitis B surface antigen and its aptamer, followed by restriction enzyme digestion. The products are detected by a nanopore for precise quantification at very low concentrations. The result achieves the limit of quantification (LOQ) of 10 fM, outperforming conventional assays. Clinical validation with patient samples confirms its superiority. This integrated technology is a powerful tool for HBV early diagnosis, treatment monitoring, and disease assessment, and paves the way for nanopore technology in clinical diagnostics.

RevDate: 2025-06-09
CmpDate: 2025-06-09

Xu Y, Deng R, Liu X, et al (2025)

CRISPR/Cas12a-triggered electrochemiluminescence biosensor to ultrasensitive detect herpes simplex virus via self-enhanced near-infrared selenium-based polymer dots.

Biosensors & bioelectronics, 286:117597.

Herpes simplex virus (HSV) as one of the most popular herpesviruses exhibits nearly identical clinical symptoms among the family of herpesvirus species and it is urgent to develop high specific biosensors to realize accurate detection of HSV. CRISPR/Cas12a systems with programmability and high specificity could serve an essential role in accurate diagnosis of HSV in complex samples. Herein, a novel near-infrared selenium-based polymer dots with self-enhanced effect were unprecedentedly designed and successfully synthesized in this work, and an ultrasensitive biosensor has been constructed together with the CRISPR/Cas12a system for the specific detection of HSV. Notably, the as-prepared selenium-based polymer dots exhibited near-infrared emission with a peak at 760 nm, which could significantly minimize background noise and achieve high sensitivity. The proposed biosensor demonstrated a wide linear range from 1 fM to 1 nM and the limit of detection as low as 0.1 fM (S/N = 3). Undoubtedly, the CRISPR/Cas12a-triggered ECL biosensor proposed in this work could provide a simple, sensitive, and environmentally friendly approach to detect HSV in clinical applications.

RevDate: 2025-06-09
CmpDate: 2025-06-09

Lv B, Liang P, Chang C, et al (2025)

Sensitive aptasensing of tobramycin through a rational design of catalytic hairpin assembly and hybridization chain reaction amplification monomers for CRISPR/Cas12a activation.

The Analyst, 150(12):2580-2590.

The catalytic hairpin assembly (CHA) and hybridization chain reaction amplification (HCR) are enzyme-free isothermal DNA amplification methods based on the self-assembly of hairpin monomers. Recently, CRISPR/Cas12a-based biosensors in combination with CHA or HCR signal amplification have shown promising performance. Herein, several design strategies for hairpin monomers in CHA and HCR were evaluated in the context of CRISPR/Cas12a-based biosensor construction. The SL-HCR strategy, in which the CRISPR/Cas12a target strand is blocked in the loop of one hairpin monomer DNA and released in the duplex HCR products, demonstrated superior performance in terms of a low background signal, wide linear detection range, and high signal-to-noise ratio. With the assistance of an aptamer-containing probe, a highly sensitive aptasensor was constructed for tobramycin detection, whereby the SL-HCR served the function of signal amplification, whereas the CRISPR/Cas12a system acted to cleave the FQ probes, thereby resulting in the production of a fluorescent signal. After optimization, the aptasensor enables linear detection of tobramycin concentrations ranging from 125 pM to 2500 nM, with a limit of detection (LOD) of 92.87 pM. Moreover, the aptasensor was utilized to detect tobramycin in beef and milk samples, yielding satisfactory results. The assay is concise and cost-effective due to the absence of nanomaterial DNA labeling and magnetic separation procedures. Furthermore, the entire detection workflow operates under isothermal conditions, which makes it suitable for use in food safety control and environmental monitoring. In addition, the results presented here may shed new light on the design of CRISPR/Cas12a-based biosensors in combination with CHA or HCR.

RevDate: 2025-06-06
CmpDate: 2025-06-02

Hanlon MB, Shohet JM, SA Wolfe (2025)

Selective targeting of genome amplifications and repeat elements by CRISPR-Cas9 nickases to promote cancer cell death.

Nature communications, 16(1):5126.

Focal gene amplification serves as an oncogenic driver during tumorigenesis and is a hallmark of many forms of cancer. Oncogene amplifications promote genomic instability, which is integral to cancer cell survival and evolution. However, focal gene amplification potentially affords an opportunity for therapeutic exploitation. As a proof-of-concept, we leverage CRISPR-Cas9 nickase to selectively promote cancer cell death in MYCN-amplified neuroblastoma in a gene amplification-dependent manner. Our analysis demonstrates that CRISPR-Cas9 nickase can generate a lethal number of highly toxic, replication-dependent double-strand breaks in cells harboring amplified loci. Furthermore, we demonstrate that Cas9 nickase-mediated toxicity can be modulated in combination with small molecule inhibitors targeting key regulators of the DNA-damage response or cell death pathways. Importantly, our findings in MYCN-amplified neuroblastoma translate to other cancer types with distinct oncogene amplifications.

RevDate: 2025-06-08
CmpDate: 2025-06-08

Wang R, Yang Y, Wang Z, et al (2025)

Stimuli-responsive peptide nanocarriers for tumor-specific CRISPR/Cas9 delivery and precision genome editing.

Journal of colloid and interface science, 697:137932.

CRISPR/Cas9 ribonucleoprotein (RNP) delivery remains a critical challenge due to its large size, instability, and off-target effects. Here, we report a stimuli-responsive cationic amphiphilic peptide, (CR3)3C, designed for cancer-targeted delivery of CRISPR/Cas9 RNP. The peptide integrates three functional domains: (1) a naphthyl-diphenylalanine (Nap-FF) motif enabling self-assembly into stable nanoparticles via aromatic interactions, (2) a matrix metalloproteinase-7 (MMP7)-cleavable linker (GPLGLA) for tumor microenvironment-specific activation, and (3) a redox-responsive cationic domain ((CRRR)3-C) for electrostatic RNP binding and glutathione (GSH)-triggered intracellular release. The (CR3)3C/RNP nanocomplexes (108.8 nm diameter, ζ = +10.89 mV) demonstrate exceptional stability and cellular uptake efficiency. Mechanistic studies reveal caveolae-mediated endocytosis and lipid raft-associated pathways, proton sponge effect-driven endosomal escape, and nuclear localization facilitated by Cas9's nuclear localization signal. In HeLa-EGFP cells, (CR3)3C/RNP shows 33.8 % gene editing efficiency at 100 nM RNP with >90 % cell viability. This work establishes a programmable, non-viral platform that synergizes enzymatic and redox responsiveness for tumor-targeted genome editing, addressing critical barriers in CRISPR therapeutics.

RevDate: 2025-06-08
CmpDate: 2025-06-08

Wu HJ, Yang JP, Ma WJ, et al (2025)

A CRISPR/Cas9-induced point mutation on the GABA receptor subunit RDL confers high resistance to phenylpyrazole insecticides in the rice planthopper Laodelphax striatellus.

Insect biochemistry and molecular biology, 181:104327.

The Delphacidae planthopper Laodelphax striatellus (Order: Hemiptera) is one of the most damaging insect pests of rice crops in Asia. The phenylpyrazole insecticide fipronil was introduced in China in the mid-1990s to control these pests, but its widespread use has led to the development of high levels of resistance. Field sampling coupled with in vitro assays indicated that an A2'N-point mutation in the gamma-aminobutyric acid receptor RDL has been linked to fipronil resistance; however, genetic evidence supporting this association has been lacking. Here, we generated an A2'N-point mutation (LsRDL[A/N]) in L. striatellus using CRISPR/Cas9-mediated homologous recombination. Bioassay revealed that the LsRDL[A/N] mutants conferred a 1211-fold higher resistance to fipronil compared to wild-type planthoppers. Furthermore, these mutants also showed significant resistance (>1000-fold) to ethiprole but not to imidacloprid, demonstrating that the A2'N mutation confers resistance specific to phenylpyrazole insecticides. However, the LsRDL[A/N] mutants displayed reduced fecundity, lower egg hatching rates, and prolonged egg and nymph stages, indicating that fipronil resistance carries a substantial fitness cost. These findings enhance our understanding of the genetic mechanisms underlying phenylpyrazole resistance and provide valuable insights for developing effective resistance management strategies for planthoppers.

RevDate: 2025-06-08
CmpDate: 2025-06-08

Ramadan NK, Gaber N, Ali NM, et al (2025)

SHERLOCK, a novel CRISPR-Cas13a-based assay for detection of infectious bursal disease virus.

Journal of virological methods, 337:115185.

Infectious bursal disease (IBD) is an extremely contagious viral infection that primarily affects young chicks, leading to significant economic losses in the poultry industry. The disease is caused by a double-stranded RNA virus of the genus Avibirnavirus, family Birnaviridae, namely, the infectious bursal disease virus (IBDV). Unfortunately, current methods for detecting IBDV lack adequate sensitivity. Accordingly, the advantages of the Specific High Sensitivity Enzymatic Reporter UnLOCKing (SHERLOCK) assay were employed to develop an ultrasensitive assay (IBD-SHERLOCK assay) for the detection of IBDV in clinical chicken tissues. The assay comprises two steps: isothermal preamplification of the target RNA through reverse transcription recombinase polymerase amplification (RT-RPA) and a subsequent detection step, which is based on the CRISPR-Cas13a system. The integration of lateral flow (LFD) visual detection of the IBD-SHERLOCK products strengthens the feasibility of the assay for use as a point-of-care test in chicken farms. Compared with RT-qPCR, this method exhibited ultra-analytical and clinical sensitivity. The assay has a lower detection limit of 5 aM, which is equivalent to three IBDV-RNA molecules. The assay demonstrated the ability to detect IBDV-RNA in 70 clinical field samples, 15 of which tested negative by RT-qPCR. This evidence highlights its superior sensitivity and potential for early detection of IBDV in chicken tissues. This study effectively established and verified a CRISPR-based diagnostic test for the early detection of IBDV in clinical chicken tissues, demonstrating remarkable specificity and sensitivity. The IBD-SHERLOCK assay can be used as a highly sensitive point-of-care diagnostic tool in chicken farms.

RevDate: 2025-06-02

Huda NU, Hasan KA, Saleem F, et al (2025)

Coriander borne Salmonella superbug: genomic assessments of chromosomal and plasmid-associated resistance, virulence and MGEs of XDR Salmonella enterica Typhi NH1.

Pathogens and global health [Epub ahead of print].

The drug-resistant strains of Salmonella enterica serovar Typhi (S. Typhi) are serious threats to health sectors worldwide. This study focuses on genomic characterization of environmentally derived an extensively drug resistant (XDR) strain of Salmonella Typhi, highlighting its potential to cause significant outbreak. The XDR strain (labeled as NH1) was isolated from fresh coriander, and characterized through whole-genome sequencing to investigate its lineage diversity, niche adaptation, sources and resistant mechanism. The NH1 strain exhibits phylogenomic association with clinical lineages S. Typhi NCTC8385 and ASM3025476. Its genome, assembled in 67 contigs, exhibited expected coverage and GC content, harboring a mega-plasmid, virulence factors, and intrinsic and extrinsic antimicrobial resistance genes. Plasmid annotation revealed IncQ1 and IncY plasmids responsible for the acquired resistance. SPIFinder identified SPI1-10 pathogenicity islands, and the CRISPR-Cas locus, associated with bacterial defense, bile salt resistance and biofilm formation, was present. NH1 strain also possesses numerous mobile elements (proteins and transposases), 12 prophages, and secretion systems (types I-IV, VI), aiding its survival in environment like vegetables. The genomic characterization of S. Typhi NH1 highlights the emergence of coriander-borne XDR strain, underscoring the need for targeted prevention to mitigate its public health impact.

RevDate: 2025-06-05
CmpDate: 2025-06-02

De Pablo-Moreno JA, González-Brusi L, Miguel-Batuecas A, et al (2025)

Development of a novel and viable knock-in factor V deficiency murine model: Utility for an ultra-rare disease.

PloS one, 20(6):e0321864.

Factor V deficiency is a congenital coagulation disorder characterized by the absence or malfunction of factor V (FV). The purpose of this study was to develop a viable FV-deficient mouse model using CRISPR/Cas9 technology. A viable pathological model of the disease was not available to develop new therapies. A previous in silico study was performed to select a mutation causing a mild disease phenotype in humans (Thr1898Met missense). Such mutation was replicated in mice by CRISPR-mediated homology directed repair. Following crossing, homozygous individuals were subjected to coagulometry assays, including FV levels, prothrombin time (PT), and activated partial thromboplastin time (aPTT). The in silico study suggested that the mutation destabilizes FV structure of both mouse and human variants, putatively producing a mild phenotype of the disease in mice. Mendelian inheritance was observed in the offspring. No spontaneous signs of blood clotting disturbances, premature deaths or gestational dysfunctions were observed. FV levels in homozygous animals were 24.5% ± 5.1; 39.7 sec ± 2.8; PT was 61.8% ± 6.3; 23.4 sec ± 1.6 (INR = 1.47 ± 0.12); and aPTT was 46.9 sec ± 3.2. A viable FV-deficient mouse model was generated by introducing a missense mutation in FV. The model exhibits a mild phenotype of the disease, akin to that observed in humans.

RevDate: 2025-06-02

Hu J, Yu W, Cui J, et al (2025)

Recent advances in diagnostic technologies for postoperative central nervous system infections: a review.

Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology [Epub ahead of print].

Postoperative central nervous system infections (PCNSIs), including meningitis, cerebral abscesses, and implant-associated infections, represent critical complications following neurosurgical procedures. These infections pose significant risks to patient outcomes due to delayed diagnosis, escalating antimicrobial resistance, and limited therapeutic efficacy. Conventional diagnostic approaches, such as cerebrospinal fluid (CSF) analysis, microbial cultures, and neuroimaging, exhibit notable limitations in sensitivity, specificity, and rapidity. This review highlights transformative technologies reshaping PCNSI diagnostics, including molecular assays (e.g., quantitative PCR, digital droplet PCR), metagenomic next-generation sequencing (mNGS), CRISPR-based pathogen detection platforms, metabolomics, and advanced molecular imaging modalities. Furthermore, we address translational challenges in clinical adoption, including cost barriers, standardization gaps, and the need for interdisciplinary collaboration. Emerging artificial intelligence (AI)-driven strategies are proposed to optimize pathogen identification, predict antimicrobial resistance profiles, and tailor personalized therapeutic regimens.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Zhao S, Zhang J, Yu S, et al (2025)

Integration of RPA and CRISPR-Cas13a collateral activity for one-step detection of DHAV-3: A biological macromolecule-enabled diagnostic platform.

International journal of biological macromolecules, 314:144400.

Duck hepatitis A virus type 3 (DHAV-3), which is families of the Picornaviridae, poses severe threats to waterfowl industries due to rapid antigenic evolution and limitations in conventional diagnostics. Herein, we engineered a CRISPR-Cas13a-mediated RNA detection system by leveraging the intrinsic HEPN domain-dependent collateral cleavage activity of Cas13a, synergistically integrated with recombinase polymerase amplification (RPA) to target DHAV-3 RNA. This biological macromolecule-driven platform achieved ultrasensitive detection (1 copies/μL) within 35 min through sequence-specific crRNA guidance and Cas13a-triggered fluorescent/lateral flow signal amplification. Rigorous validation against four avian pathogens (ARV, H9N2 AIV, TMUV, AstV) confirmed 100 % specificity, highlighting the precise macromolecular interactions between Cas13a and target RNA. Clinical evaluation of 30 field samples demonstrated complete concordance with RT-qPCR. By harnessing the programmable functionality of Cas13a and the thermostable enzymes in RPA, this study provides a novel paradigm for RNA-guided biological macromolecule applications in point-of-care diagnostics, bridging molecular mechanisms with agricultural biosecurity needs.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Martin OL, Lynch CRH, R Fleming (2025)

Advancing forensic body fluid identification: A comparative analysis of RT-LAMP+CRISPR-Cas12a and established mRNA-based methods.

Forensic science international. Genetics, 78:103297.

In forensic science, the analysis of body fluid evidence determines the cellular origin of a sample, aiding in the reconstruction of a potential crime. Messenger ribonucleic acid (mRNA) based confirmatory tests address limitations of current conventional methods, providing increased specificity and sensitivity, minimal sample consumption, and the detection of a broader range of body fluids. However, they require expensive instrumentation, longer reaction times, and lack portability. Reverse-transcription loop-mediated isothermal amplification (RT-LAMP) coupled with clustered regular interspaced short palindromic repeats (CRISPR) with CRISPR-associated protein 12a (Cas12a) has the potential to overcome these challenges. This approach offers reduced testing time and cost, while potentially providing equivalent sensitivity and specificity, as observed in the field of viral diagnostics. Visual detection capabilities enable the development of rapid, portable screening tests suitable for testing at the crime scene. In the context of a sexual assault investigation, RT-LAMP+CRISPR-Cas12a could potentially increase the efficiency and detection rate. This study compares this novel method to two other mRNA-based methods, endpoint reverse transcription polymerase chain reaction (RT-PCR) multiplex assay CellTyper 2, and a real-time reverse transcription quantitative PCR (RT-qPCR) multiplex assay. The tests' sensitivity and specificity were evaluated on single-source and mixed body fluid samples, including rectal mucosa, a fluid which is minimally explored in forensic literature. The RT-qPCR assay demonstrated the highest sensitivity, specificity, and precision in mixed samples. In addition, RT-qPCR offers a greater linear dynamic range, faster processing time and easier methodology compared to CellTyper 2, only limited by its expensive nature. Notably, rectal mucosa samples exhibited non-specific marker expression of CellTyper 2 markers and expression of CYP2B7P (vaginal fluid) for all methods. This emphasises the need for a dedicated rectal mucosa marker. RT-LAMP+CRISPR-Cas12a exhibited a high specificity, displaying off-target expression of CYP2B7P in two fluid types. However, the method lacked sensitivity and precision for most markers except MMP3 (menstrual blood), demonstrating detection down to 1:10,000 with 100 % specificity. RT-LAMP+CRISPR requires further development, but its quick, inexpensive nature and high specificity suggest it has potential as a confirmatory test that could reduce the limitations of existing methods.

RevDate: 2025-06-06
CmpDate: 2025-06-06

Gao X, Zhou C, Feng Y, et al (2025)

Research progress of gene editing technology in neurological diseases.

Gene, 962:149534.

Gene editing (GE) technology is a genetic manipulation technique based on artificial nucleases that enables the precise modification of DNA or RNA. With the development of technology, GE in disease treatment is becoming increasingly widespread, playing an essential role in haematology, cancer, and neurological disorders (ND). This review describes the principles, advantages, and limitations of four GE technologies, focusing on the fourth generation of GE (next-generation GE). The next-generation GE technology breaks the limitations of traditional GE technology, makes GE more precise and stable, and broadens the scope of gene technology applications. Additionally, this review explores the latest gene therapy strategies for ND, focusing on the application of next-generation GE technologies to examine the prospects for the application of GE technologies. This study discusses and analyses the great advantages and potential of GE technology for treating ND and elucidates the shortcomings of GE in this field.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Tang Q, Liao Q, Huang X, et al (2025)

A highly sensitive MiRNA detection sensor powered by CRISPR/Cas13a and entropy-driven amplification.

Bioelectrochemistry (Amsterdam, Netherlands), 165:108992.

MicroRNAs (miRNAs) are critical regulators of numerous physiological and pathological processes, influencing gene expression and playing essential roles in cellular development, differentiation, and disease progression. Their sensitive and specific detection is vital for advancing biomedical research and clinical diagnostics, particularly for early disease detection and biomarker discovery. However, traditional miRNA detection methods often face significant challenges, such as limited sensitivity, insufficient specificity, and the inability to detect low-abundance miRNAs in complex biological samples. To overcome these limitations, we present a novel miRNA detection electrochemiluminescence (ECL) platform that integrates entropy-driven amplification with clustered regularly interspaced short palindromic repeats (CRISPR)/Cas13a-mediated RNA cleavage. The entropy-driven amplification strategy exploits the thermodynamic advantages of nucleic acid hybridization, driving spontaneous molecular reorganization to amplify detection signals and achieve ultralow detection limits. CRISPR/Cas13a, an RNA-targeting nuclease, provides exceptional sequence specificity by recognizing and binding to target miRNA sequences, activating a collateral cleavage mechanism. This activity cleaves hairpin (HP) structure, generating a signal that further triggers EDA over DNA tetrahedron (DT) to induce a vigorous ECL response. Based on this strategy, we achieve rapid and precise quantification of miR-17 at femtomolar levels. Experimental results demonstrate high sensitivity, specificity, and the ability to analyze complex biological samples in the laboratory. This innovative approach holds great promise for advancing molecular diagnostics and personalized medicine.

RevDate: 2025-06-06
CmpDate: 2025-06-06

Bhoir K, Prakash G, A Odaneth (2025)

Genetic Engineering of Yarrowia lipolytica for 1,8-cineole production: A sustainable approach.

Enzyme and microbial technology, 189:110659.

1,8-Cineole, a monoterpene with diverse industrial and pharmaceutical applications, has garnered significant interest due to its unique properties. This study aims to achieve sustainable production of 1,8-cineole from Yarrowia lipolytica through metabolic and media engineering strategies. The heterologous 1,8-cineole synthase from Streptomyces clavuligerus was integrated through CRISPR-Cas9, along with overexpression of key genes in the mevalonate pathway and a double mutation in the Erg20p to enhance flux towards geranyl pyrophosphate. The modified strain was further investigated for varying carbon and nitrogen sources with MgSO4 addition. The above approaches achieved a titer of 4.68 mg/L of 1,8-cineole along with 1108.53 mg/L of intracellular squalene when grown on 5 % WCO, marking the first report of genetic engineering of Y. lipolytica for 1,8-cineole production. Further studies are in progress to redirect internal fluxes to 1,8-cineole for improvising yields and productivities. This work shows a sustainable and innovative approach to biotechnology improvements in terpene biosynthesis and waste valorization.

RevDate: 2025-06-06
CmpDate: 2025-06-06

Khademi Z, Mottaghi-Dastjerdi N, Morad H, et al (2025)

The role of CRISPR-Cas9 and CRISPR interference technologies in the treatment of autoimmune diseases.

Autoimmunity reviews, 24(7):103816.

Autoimmune disorders can be described as inappropriate immune responses directed against self-antigens, which account for substantial healthcare concerns around the world. Immunosuppression or immune modulation are the main therapeutic modalities for autoimmune disorders. These modalities, however, impair the ability of the immune system to fight against infections, thereby predisposing to opportunistic diseases. This review explores existing therapies for autoimmune disorders, highlighting their limitations and challenges. Additionally, it describes the potential of CRISPR-Cas9 technology as a novel therapeutic approach to address these challenges.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Guo P, Song S, Niu Y, et al (2025)

Alternative splicing of bunched confers a dual role in hippo pathway-dependent growth and tumorigenesis.

Oncogene, 44(24):1949-1960.

Alternative splicing is a fundamental mechanism that generates functionally distinct proteins from individual genes, contributing to gene regulation and proteomic diversity. In Drosophila, the bunched (bun) gene, a member of the TSC-22 domain gene family, undergoes alternative splicing, yielding diverse protein isoforms involved in crucial biological processes. Nevertheless, the specific roles and regulatory mechanisms of each isoform remain elusive. Here, we employed CRISPR/Cas9 technology to introduce targeted deletions within the endogenous locus of the bun gene, resulting in the removal of either long or short isoforms. We discovered that the short isoforms demonstrated a growth-suppressive role, whereas the long isoforms exhibited a growth-promoting effect. Surprisingly, the long isoforms exhibited a remarkable dual functionality, as both deletion and amplification of long isoform expression impede the excess growth induced by Hippo pathway inactivation. Mechanistically, ectopically expressed Bun long isoforms act as the transcriptional suppressor by competitively binding to targets' promoter regions in conjunction with Yorkie/Scalloped (Yki/Sd), thereby inhibiting its transcriptional outputs and ultimately leading to the growth suppression. These findings unveil the intricate interaction between distinct spliced isoforms of Bun and oncogenic outcomes, highlighting Bun long isoforms as the critical transcription suppressor regulating Hippo pathway inactivation-mediated growth and tumorigenesis in Drosophila.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Tang Q, Zhang J, Pang J, et al (2025)

Hybridization chain reaction and CRISPR/Cas12a-integrated biosensor for precise Ago2 detection.

Bioelectrochemistry (Amsterdam, Netherlands), 165:108975.

This study introduces an innovative electrochemiluminescence (ECL) biosensor for the highly sensitive and specific detection of Argonaute 2 (Ago2) activity. Ago2, a key enzyme in the RNA interference (RNAi) pathway, plays a crucial role in gene regulation, and its dysregulation is associated with diseases such as cancer and viral infections. The biosensor integrates hybridization chain reaction (HCR) amplification and the CRISPR/Cas12a system, leveraging a multi-stage signal amplification strategy. The detection mechanism begins with Ago2-mediated cleavage of a designed hairpin RNA (HP-RNA), releasing single-stranded RNA (ssRNA) that triggers HCR. This amplification step generates long DNA polymers, which serve as activators for the CRISPR/Cas12a system. Cas12a's collateral cleavage activity amplifies the signal further by cleaving a DNA reporter labeled with a ruthenium-based luminophore, enhancing the ECL output. This dual amplification strategy achieves exceptional sensitivity, with a detection limit of 0.126 aM. The biosensor demonstrates excellent specificity, distinguishing Ago2 from other Argonaute proteins, and maintains high reproducibility and stability, retaining 94 % of its signal after two weeks of storage. Real-world applicability was confirmed by accurately detecting Ago2 in spiked cell lysates, with recovery rates exceeding 100 %. The combination of HCR, CRISPR/Cas12a, and ECL establishes a robust platform for biomarker detection, offering superior sensitivity and adaptability for clinical diagnostics, disease monitoring, and therapeutic evaluation. This biosensor represents a significant advancement in the development of next-generation diagnostic tools.

RevDate: 2025-06-07
CmpDate: 2025-06-06

Lodewijk GA, Kozuki S, Han CJ, et al (2025)

Self-organization of mouse embryonic stem cells into reproducible pre-gastrulation embryo models via CRISPRa programming.

Cell stem cell, 32(6):895-913.e8.

Embryonic stem cells (ESCs) can self-organize into structures with spatial and molecular similarities to natural embryos. During development, embryonic and extraembryonic cells differentiate through activation of endogenous regulatory elements while co-developing via cell-cell interactions. However, engineering regulatory elements to self-organize ESCs into embryo models remains underexplored. Here, we demonstrate that CRISPR activation (CRISPRa) of two regulatory elements near Gata6 and Cdx2 generates embryonic patterns resembling pre-gastrulation mouse embryos. Live single-cell imaging revealed that self-patterning occurs through orchestrated collective movement driven by cell-intrinsic fate induction. In 3D, CRISPRa-programmed embryo models (CPEMs) exhibit morphological and transcriptomic similarity to pre-gastrulation mouse embryos. CPEMs allow versatile perturbations, including dual Cdx2-Elf5 activation to enhance trophoblast differentiation and lineage-specific activation of laminin and matrix metalloproteinases, uncovering their roles in basement membrane remodeling and embryo model morphology. Our findings demonstrate that minimal intrinsic epigenome editing can self-organize ESCs into programmable pre-gastrulation embryo models with robust lineage-specific perturbation capabilities.

RevDate: 2025-06-07
CmpDate: 2025-06-07

Yin E, MN Esbin (2025)

Optimized CRISPR-based knockout in BeWo cells.

Placenta, 166:71-76.

CRISPR genome editing is a widely used tool to perturb genes of interest within cells and tissues and can be used as a research tool to study the connection between genotypes and cellular phenotypes. Highly efficient genome editing is limited in certain cell types due to low transfection efficiency or single-cell survivability. This is true for BeWo cells, an in vitro model of placental syncytiotrophoblast cell-cell fusion and hormone secretion. Here we describe an optimized and easy-to-use protocol for knockout in BeWo cells using CRISPR Cas9 ribonucleoprotein (RNP) complexes delivered via electroporation. Further, we describe parameters for successful guide RNA design and how to assess genetic knockouts in BeWo cells so that users can apply this technique to their own genes of interest. We provide a positive control for inducing highly efficient knockout of the cell-cell fusion protein Syncytin-2 (ERVFRD-1) and assessing editing efficiency at this locus. We anticipate that efficient RNP-mediated genetic knockouts in BeWo cells will facilitate the study of new genes involved in cell-cell fusion and hormone secretion in this important cellular model system. Furthermore, this strategy of optimized nucleofection and RNP delivery may be of use in other difficult-to-edit trophoblast cells or could be applied to efficiently deliver transgenes to BeWo cells.

RevDate: 2025-06-02
CmpDate: 2025-06-02

Zhang M, Zhou L, Afridi M, et al (2025)

An efficient hairy root system for validation of CRISPR/Cas system activities in cotton.

Functional & integrative genomics, 25(1):116.

The hairy root induction system has been widely applied in studying gene expression and function in plant species due to its rapidity and efficiency. The hairy root system is an efficient tool for evaluating the activities of CRISPR/Cas systems. Cotton hairy roots were primarily induced through cotton tissue culture under aseptic conditions and by injecting cotton stem tips under non-aseptic conditions. However, both methods are lab-intensive and time-consuming. In this study, an efficient cotton hairy root induction procedure was established via infecting cotton hypocotyls with Agrobacterium rhizogenes under non-sterile conditions. Cotton seedlings with expanded cotyledons were decapitated with a slanted cut, and the residual hypocotyl (maintained 1 cm apical portion) was inoculated with A. rhizogenes. Over 90% of the infected explants from all three tested varieties could produce hairy roots after 8 days of inoculation. The effictiveness of the method was tested by overexpressing two reporter genes (eGFP and GUS). The transformation efficiency of the GUS and eGFP were ranged from50-68.18% and 40.9-68.18%. In addition, the editing efficiency of target sites in different CRISPR/Cas systems were also tested in hairy root. This method provided technical support for screening suitable target sites for cotton gene editing.

RevDate: 2025-06-02
CmpDate: 2025-06-02

Wu J, Yan Q, Qiu H, et al (2025)

Integrating Enzyme-DNA Complex and CRISPR/Cas12a for Robust Norovirus Detection.

Journal of medical virology, 97(6):e70426.

Human norovirus (NoV) is a primary cause of acute gastroenteritis in children, making accurate and rapid detection essential for effective disease prevention and control. In this study, we developed a sensitive and efficient platform for pathogen nucleic acid detection by integrating asymmetric nucleic acid sequence-based amplification (asymmetric NASBA), enzyme-DNA molecular complex, and the clustered regularly interspaced short palindromic repeats (CRISPR) system, namely an A-enDMC platform. The target recognition capability of the enzyme-DNA complex operates independently from the signal amplification function of the CRISPR system. By decoupling the CRISPR reaction from the dependence on specific target sequences, the platform's universality and modularity are enhanced. The assay is fast (< 1.5 h), highly sensitive (< 5 copies/µL), and demonstrates no cross-reactivity with other common viruses. Compared to the widely used RT-qPCR method, the platform demonstrates high consistency in detection results, with the detection coincidence rate of 96.77% and a kappa value of 0.87. This platform provides a versatile technological tool for highly sensitive and specific RNA detection, demonstrating its extensive potential in real sample analysis.

RevDate: 2025-06-03
CmpDate: 2025-06-02

Lund S, Gong C, Yu X, et al (2025)

Strategies for CRISPR-based knock-ins in primary human B cells and lymphoma cell lines.

Frontiers in immunology, 16:1589729.

Since its advent about ten years ago, the CRISPR-Cas9 system has been frequently used in biomedical applications. It has advanced various fields, and CRISPR-Cas9-based therapeutics have shown promising results in the treatment of specific hematological diseases. Furthermore, CRISPR gene editing technologies have revolutionized cancer research by enabling a broad range of genetic perturbations, including genetic knockouts and precise single nucleotide changes. This perspective focuses on the state-of-the-art methodology of CRISPR knock-ins to engineer immune cells. Since this technique relies on homology-directed repair (HDR) of double-strand breaks (DSBs) induced by the Cas9 enzyme, it can be used to introduce specific mutations into the target genome. Therefore, this methodology offers a valuable opportunity to functionally study specific mutations and to uncover their impacts not only on overall cell functions but also on the mechanisms behind cancer-related alterations in common signaling pathways. This article highlights CRISPR knock-in strategies, protocols, and applications in cancer and immune research, with a focus on diffuse large B cell lymphoma.

RevDate: 2025-06-01
CmpDate: 2025-06-01

Okamoto M, Sasamoto K, Takahashi-Nakaguchi A, et al (2025)

CRISPR-Cas9 RNP-Mediated Deletion of ERG25 in Non-albicans Candida Species, Including Candida auris.

Medical mycology journal, 66(2):35-43.

The incidence of infections caused by non-albicans Candida (NAC) species, including Candida glabrata and Candida tropicalis, has recently increased. Furthermore, Candida auris, a multidrug-resistant yeast, poses a serious threat to global health. The development of novel antifungal agents with alternative mechanisms of action is necessary to combat these fungi. However, genetic analyses of the virulence factors in these NAC species are insufficient for this purpose. Recent advancements in the clustered regularly interspaced short palindromic repeat (CRISPR)-Cas9 system have facilitated enhanced the genetic analysis of NAC species. The RNP-based system, in which the Cas9-gRNA complex is assembled in vitro and introduced into cells, offers a simplified approach to genetic modification, eliminating the need for species-specific plasmids. Previous our research identified the ERG25 gene, which encodes C-4 sterol methyl oxidase, as a promising antifungal target in C. glabrata. This study demonstrated deletion of the ERG25 homolog in C. glabrata and C. auris using an RNP-based CRISPR-Cas9 system. The deletion of ERG25 in C. auris and C. glabrata indicated that Erg25 is crucial for the survival of these pathogenic yeasts within the host. Furthermore, we have successfully deleted the ERG25 alleles in C. tropicalis and Candida parapsilosis, demonstrating the effectiveness of using both the CRISPR-Cas9 and Cre-loxP systems in these species for the first time.

RevDate: 2025-06-06
CmpDate: 2025-06-06

Wang R, He B, Liang Z, et al (2025)

A dual-mode sensor for rapid detection of procymidone: "Dark box" qualitative analysis and electrochemical quantification mediated by PdHPCN-222/PEI-rGO and CRISPR/Cas12a.

Food chemistry, 486:144586.

This study presents an integrated dual-mode sensing strategy, in which qualitative fluorescence screening is followed by quantitative electrochemical detection, improving detection efficiency and enabling rapid PCM analysis. It develops a novel fluorescence electrochemical aptasensor that combines in vitro "Dark-box" applications with CRISPR/Cas12a system electrode surface sensing technology. PCM activates the DNA walker, and the DNAzyme induces cyclic cleavage of DNA strands bearing the Carboxyfluorescein (FMA) group. After magnetic separation, the fluorescence reaction combined with the "Dark box" enables the preliminary qualitative analysis of procymidone (PCM). Following the preliminary qualitative detection, the solution is introduced to the electrochemical aptasensor platform integrated with the CRISPR/Cas12 system. The Cas12a system triggers cyclic cleavage, producing a signal change that enables the electrochemical quantitative detection of PCM. An fluorescence (FL) response occurs when the PCM concentration in spiked samples is at or above 1 pg·mL[-1], allowing for qualitative fluorescence detection. The EC platform's detection limit is 8.51 × 10[-6] ng·mL[-1], with a range of 1 × 10[-2] ng·mL[-1] to 1 × 10[4] ng·mL[-1]. The designed dual-mode sensor provides reliable monitoring of PCM in real samples.

RevDate: 2025-06-06
CmpDate: 2025-06-06

Baerwald MR, Funk EC, Goodbla AM, et al (2025)

Rapid CRISPR-Cas13a genetic identification enables new opportunities for listed Chinook salmon management.

Molecular ecology resources, 25(5):e13777.

Accurate taxonomic identification is foundational for effective species monitoring and management. When visual identifications are infeasible or inaccurate, genetic approaches provide a reliable alternative. However, these approaches are sometimes less viable (e.g., need for near real-time results, remote locations, funding concerns, molecular inexperience). In these situations, CRISPR-based genetic tools can fill an unoccupied niche between real-time, inexpensive, but error-prone visual identification and more expensive or time-consuming, but accurate genetic identification for taxonomic units that are difficult or impossible to visually identify. Herein, we use genomic data to develop CRISPR-based SHERLOCK assays capable of rapidly (<1 h), accurately (94%-98% concordance between phenotypic and genotypic assignments), and sensitively (detects 1-10 DNA copies/reaction) distinguishing ESA-listed Chinook salmon runs (winter- and spring-run) from each other and from unlisted runs (fall- and late fall-run) in California's Central Valley. The assays can be field deployable with minimally invasive mucus swabbing negating the need for DNA extraction (decreasing costs and labour), minimal and inexpensive equipment needs, and minimal training to conduct following assay development. This study provides a powerful genetic approach for a species of conservation concern that benefits from near real-time management decision-making but also serves as a precedent for transforming how conservation scientists and managers view genetic identification going forward. Once developed, CRISPR-based tools can provide accurate, sensitive, and rapid results, potentially without the prohibitive need for expensive specialty equipment or extensive molecular training. Further adoption of this technology will have widespread value for the monitoring and protection of our natural resources.

RevDate: 2025-06-01
CmpDate: 2025-06-01

Smirnov AV, AM Yunusova (2025)

Novel CRISPR/Cas9-Based Approaches for Quantitative Study of DSB Repair Mechanics.

Biochemistry. Biokhimiia, 90(4):437-456.

This review examines modern approaches to studying double-strand break (DSB) DNA repair in mammalian cells, employing the CRISPR/Cas9 system. Due to its flexibility and efficacy, the Cas9 nuclease is used in numerous genetic reporters. We discuss various fluorescence-based genetic reporters used to monitor the repair process. In addition, among the innovative Cas9-based methods, special attention is given to the techniques that examine both single and multiple DSBs, including approaches such as DSB-TRIP and ddXR. These methods open new possibilities for investigating structural rearrangements or analyzing random genomic sites. Additionally, the review considers how DSBs induced by Cas9 differ from those made by other nucleases and how these peculiarities could impact DNA repair mechanisms. Understanding these differences is crucial for planning experiments aimed at studying DSB repair.

RevDate: 2025-06-01

Piñeiro-Silva C, J Gadea (2025)

Optimizing gene editing in pigs: The role of electroporation and lipofection.

Animal reproduction science, 278:107874 pii:S0378-4320(25)00113-7 [Epub ahead of print].

The production of genetically modified pigs is becoming increasingly important in both the agricultural and biomedical fields. Optimization of these processes is a key objective to improve the precision, scalability and viability of genetically modified animals for research and commercial applications. Among the available techniques, electroporation and lipofection have emerged as promising alternatives to traditional methods such as microinjection and somatic cell nuclear transfer (SCNT) due to their simplicity, cost-effectiveness, and potential for high-throughput applications. These methods allow the direct delivery of CRISPR/Cas components into zygotes and embryos, reducing the technical expertise required and bypassing some of the challenges associated with cloning. This review examines the application, efficacy, and outcomes of electroporation and lipofection as gene editing techniques in porcine gametes and embryos. We provide a comprehensive synthesis of recent advances, compare their efficacy, and discuss their potential in agricultural and biomedical research. The principles and mechanisms of both methods are reviewed, highlighting their advantages, such as cost-effectiveness and ease of implementation, over traditional approaches such as microinjection. In addition, we address their limitations, including variability in efficiency, and discuss recent protocol optimizations aimed at improving reproducibility and applicability. By analyzing these developments, this review provides valuable insights into the evolving role of electroporation and lipofection in porcine genetic modification strategies.

RevDate: 2025-06-01
CmpDate: 2025-06-01

Pal S, Krishna R, Dedhia L, et al (2025)

CRISPR mediated gene editing for economically important traits in horticultural crops: progress and prospects.

Transgenic research, 34(1):26.

Horticultural crops, with their cost-effectiveness, rich mineral and vitamin content, and high yield potential, have become indispensable worldwide for ensuring food and nutritional security. With the world's population on the rise and climate change becoming more prominent, it is crucial to focus on creating resilient, high-yielding crop varieties that can withstand the changing climate. Genetic improvement of different horticultural crops using conventional tools is both time-consuming and labourious. However, the breeding period can be cut short by adopting modern breeding techniques, including CRISPR/Cas-mediated genome editing. In the present review, we discuss the progress made so far through genome editing to improve several horticultural crops for various traits like stress resistance, morphology, nutritional attributes, quality, shelf life, male sterility, architecture and economic yield. We have also discussed the emerging CRISPR technologies like base editing, epigenome editing, CRE editing, transposon-based editing, prime editing etc., along with their pros and cons and the future prospects. The ethical considerations for commercialization and current regulatory frameworks for gene-edited products have also been discussed.

RevDate: 2025-06-04
CmpDate: 2025-06-01

Ortiz-Rodríguez LA, Cabanzo R, Jaimes-Dueñez J, et al (2025)

TropD-detector a CRISPR/LbCas12a-based system for rapid screening of Trypanosoma cruzi in Chagas vectors and reservoirs.

Scientific reports, 15(1):19107.

Chagas disease, also known as American Trypanosomiasis, is a zoonosis with global distribution caused by the parasite Trypanosoma cruzi, primarily transmitted through the feces of infected triatomines. The emergence of new cases highlights the importance of early pathogen detection in vectors and reservoirs to generate effective control strategies and establish preventive policies. The objective of this study was to design and validate a detection system of T. cruzi based on specific DNA cleavage, activation of Cas12a and trans-cleavage, targeting the genes Cytochrome B (Cytb), 18 S ribosomal subunit (SR18 s), and histone (H2 A). This system was validated for their uses in both vectors and reservoirs of the parasite. The initial step involved performing a bioinformatic analysis of the target genes, followed by the design of RNA guides specific to each cleavage site, along with primers for amplifying the target region through PCR and RPA. Subsequently, we sequenced the amplified DNA target and validated the detection system using T. cruzi DNA extracted from naturally infected Rhodnius pallescens in the metropolitan area of Bucaramanga, Colombia. After standardizing the method, we tested the CRISPR/Cas system with Silvio X10 laboratory strain of T. cruzi and scaled up to blood samples of naturally infected Didelphis marsupialis. As a result, we observed DNA cleavage using the CRISPR/Cas system with the Cytb guide, achieving a detection sensitivity of 118 parasite equivalents/mL in PCR and 116 parasite equivalents/mL with RPA amplification. Sequencing of the Cytb gene showed no mutations in the cleavage site. However, point mutations and indels were found in SR18S and H2 A, avoiding the formation of the CRISPR/LbCas12 complex. Furthermore, we introduce the design of a fluorescent detection prototype with CRISPR/LbCas12a called "Tropical Diseases Detector" (TropD-Detector). This device operates with an excitation wavelength of 480 nm emitted by an LED and a high-pass light filter with a cutoff wavelength of 500 nm. We detected positive samples using any photographic camera system. The TropD-Detector provides a visual, viable, and sensitive method for detecting T. cruzi in both vectors and reservoirs from endemic areas.

RevDate: 2025-06-04
CmpDate: 2025-06-01

Schweitzer AY, Adams EW, Nguyen MTA, et al (2025)

Precision multiplexed base editing in human cells using Cas12a-derived base editors.

Nature communications, 16(1):5061.

Base editors enable the direct conversion of target nucleotides without introducing DNA double strand breaks, making them a powerful tool for creating point mutations in a human genome. However, current Cas9-derived base editing technologies have limited ability to simultaneously edit multiple loci with base-pair level precision, hindering the generation of polygenic phenotypes. Here, we test the ability of six Cas12a-derived base editing systems to process multiple gRNAs from a single transcript. We identify base editor variants capable of multiplexed base editing and improve the design of the respective gRNA array expression cassette, enabling multiplexed editing of 15 target sites in multiple human cell lines, increasing state-of-the-art in multiplexing by three-fold in the field of mammalian genome engineering. To reduce bystander mutations, we also develop a Cas12a gRNA engineering approach that directs editing outcomes towards a single base-pair conversion. We combine these advances to demonstrate that both strategies can be combined to drive multiplex base editing with greater precision and reduced bystander mutation rates. Overcoming these key obstacles of mammalian genome engineering technologies will be critical for their use in studying single nucleotide variant-associated diseases and engineering synthetic mammalian genomes.

RevDate: 2025-05-31

Kolesova E, Pulone S, Kostyushev D, et al (2025)

CRISPR/Cas bioimaging: From whole body biodistribution to single-cell dynamics.

Advanced drug delivery reviews pii:S0169-409X(25)00104-8 [Epub ahead of print].

This review explores the transformative role of CRISPR/Cas systems in optical bioimaging, emphasizing how advancements in nanoparticle (NP) technologies are revolutionizing the visualization of gene-editing processes both in vitro and in vivo. Optical imaging techniques, such as near-infrared (NIR) and fluorescence imaging, have greatly benefited from the integration of nanoformulated contrast agents, improving resolution, sensitivity, and specificity. CRISPR/Cas systems, originally developed just for gene editing, are now being coupled with these imaging modalities to enable real-time monitoring and quantitative measurements of metabolites, vitamins, proteins, nucleic acids and other entities in specific areas of the body, as well as tracking of CRISPR/Cas delivery, editing efficiency, and potential off-target effects. The development of CRISPR/Cas-loaded NPs allows for enhanced imaging and precise monitoring across multiple scales with multiplexed and multicolor imaging in complex settings, including potential in vivo diagnostics. CRISPR/Cas therapeutics as well as diagnostics are hindered by the lack of efficient and targeted delivery tools. Biomimetic NPs have emerged as promising tools for improving biocompatibility, enhancing targeting capabilities, and overcoming biological barriers, facilitating more efficient delivery and bioimaging of CRISPR/Cas systems in vivo. As the design of these NPs and delivery mechanisms improves, alongside advancements in endolysosomal escape, CRISPR/Cas-based bioimaging will continue to advance, offering unprecedented possibilities in precision medicine and theranostic applications.

RevDate: 2025-05-31
CmpDate: 2025-05-31

Jin H, Sophocleous A, Azfer A, et al (2025)

Analysis of Transcriptional Regulation in Bone Cells.

Methods in molecular biology (Clifton, N.J.), 2885:247-269.

Transcription is a process by which the rate of RNA synthesis is regulated. Here we describe the techniques for carrying out promoter-reporter assays: electrophoretic mobility shift assays, chromosome conformation capture (3C) assays, chromatin immunoprecipitation assays, and CRISPR-Cas9 assay-five commonly used methods for studying and altering gene transcription.

RevDate: 2025-05-31
CmpDate: 2025-05-31

Kamli H, NU Khan (2025)

Revolutionising cancer intervention: the repercussions of CAR-T cell therapy on modern oncology practices.

Medical oncology (Northwood, London, England), 42(7):228.

Chimeric Antigen Receptor T-cell (CAR-T) therapy represents a groundbreaking advance in oncology, leveraging patient-specific immune cells to target malignant tumours precisely. By equipping T cells with synthetic receptors, CAR-T therapy achieves remarkable antitumor effects and offers hope for durable cancer control. However, several limitations persist, including antigen scarcity, immunosuppressive tumour microenvironments, and T-cell exhaustion. CRISPR-Cas9 gene editing has enhanced CAR-T potency by knocking out immune checkpoints (PD-1, CTLA-4) and improving persistence, while RNA interference (RNAi) silences immune-evasion genes (e.g. SOCS1). Nanozyme-based delivery systems enable precise CRISPR-Cas9 delivery (> 70% editing efficiency) and tumour targeting, overcoming instability and off-target effects. Innovations like SUPRA CARs, armoured CAR-T cells (e.g. IL-12/IL-21-secreting TRUCKs), and dual checkpoint inhibition synergize to reprogram the tumour microenvironment, reducing relapse by 40% in trials. Despite progress, high costs, manufacturing hurdles, and ethical concerns (e.g. germline editing risks) remain critical barriers. Emerging solutions include universal off-the-shelf CAR-Ts, hybrid nano-CRISPR systems, and AI-driven design, paving the way for scalable, personalised immunotherapy. This review highlights breakthroughs in CRISPR, RNAi, and nanotechnology, underscoring CAR-T therapy's transformative potential while addressing translational challenges for broader clinical adoption.

RevDate: 2025-06-02

Blaskovich MAT, MA Cooper (2025)

Antibiotics re-booted-time to kick back against drug resistance.

npj antimicrobials and resistance, 3(1):47.

After decades of neglect and a decline in antibiotic research and development, we are now finally witnessing the advent of new funding programs dedicated to new therapies. In addition to traditional new chemical entities that directly kill or arrest the growth of bacteria, alternative approaches are being identified and advanced towards proof-of-concept trials in the clinic. We briefly review the current pipeline of conventional new antibiotics and highlight in more depth promising alternatives, including potentiators of antibiotic action, bacteriophage, lysins and microbiome modulation. More innovative approaches, such as adaptive and innate immune modulators, CRISPR-Cas and diagnostic guided 'theranostics' are discussed and contrasted. Such exploratory therapies may require the development of alternative regulatory and clinical development pathways, but represent a potential circuit breaker from the current 'arms race' between bacteria and traditional antibiotics.

RevDate: 2025-06-02
CmpDate: 2025-05-30

Schwaemmle H, Soldati H, Lykoskoufis NMR, et al (2025)

CRISPR screen decodes SWI/SNF chromatin remodeling complex assembly.

Nature communications, 16(1):5011.

The SWI/SNF (or BAF) complex is an essential chromatin remodeler, which is frequently mutated in cancer and neurodevelopmental disorders. These are often heterozygous loss-of-function mutations, indicating a dosage-sensitive role for SWI/SNF subunits. However, the molecular mechanisms regulating SWI/SNF subunit dosage to ensure complex assembly remain largely unexplored. We performed a CRISPR KO screen, using epigenome editing in mouse embryonic stem cells, and identified Mlf2 and Rbm15 as regulators of SWI/SNF complex activity. First, we show that MLF2, a poorly characterized chaperone protein, promotes SWI/SNF assembly and binding to chromatin. Rapid degradation of MLF2 reduces chromatin accessibility at sites that depend on high levels of SWI/SNF binding to maintain open chromatin. Next, we find that RBM15, part of the m[6]A writer complex, controls m[6]A modifications on specific SWI/SNF mRNAs to regulate subunit protein levels. Misregulation of m[6]A methylation causes overexpression of core SWI/SNF subunits leading to the assembly of incomplete complexes lacking the catalytic ATPase/ARP subunits. These data indicate that targeting modulators of SWI/SNF complex assembly may offer a potent therapeutic strategy for diseases associated with impaired chromatin remodeling.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Zuo Z, Liang R, Fan S, et al (2025)

Genome-wide CRISPR screens identify key regulators of adipogenesis and glucose uptake in beige adipocytes.

Biochemical and biophysical research communications, 774:152093.

The beiging of white adipocytes enhances energy expenditure by utilizing fatty acids and glucose, offering therapeutic potential against obesity and type 2 diabetes. However, the genetic mechanisms driving this process remain unclear. Here, we performed multiple fluorescence-activated cell sorting (FACS)-based genome-wide CRISPR loss-of-function screens in beige adipocytes with or without insulin resistance (IR) induction, and systematically identified functional regulators of beige adipocyte adipogenesis and glucose metabolism. We further integrated transcriptomics and human genetics data to pinpoint key genes for adipogenesis and glucose metabolism in beige adipocytes. Moreover, we validated SULT2B1 and ATP1B2 as key adipogenesis genes for beige adipocytes, and COMMD7 gene as important regulator for glucose uptake against IR. These findings not only provide a comprehensive and valuable resource for cataloguing candidate functional genes underlying lipid and glucose homeostasis in beige adipocytes, but also offer potential therapeutic targets against metabolic disorders.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Hecht AD, OA Igoshin (2025)

Kinetic Mechanism for Fidelity of CRISPR-Cas9 Variants.

The journal of physical chemistry letters, 16(22):5570-5578.

CRISPR-Cas9 is a nuclease creating DNA breaks at sites with sufficient complementarity to the RNA guide. Notably, Cas9 does not require exact RNA-DNA complementarity and can cleave off-target sequences. Various high-accuracy Cas9 variants have been developed, but the precise mechanism of how these variants achieve higher accuracy remains unclear. Here, we develop a kinetic model of Cas9 substrate selection and cleavage parametrized by data from the literature, including single-molecule Förster resonance energy transfer (FRET) measurements. Based on observed FRET transition statistics, we predict that the Cas9 substrate recognition and cleavage mechanism must allow for HNH domain transitions independent of substrate binding. Additionally, we show that the enhancement in Cas9 substrate specificity must be due to changes in kinetics rather than changes in substrate binding affinities. Finally, we use our model to identify kinetic parameters for HNH domain transitions that can be perturbed to enable high-accuracy cleavage while maintaining cleavage speeds.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Choi H, Yi TG, Gho YS, et al (2025)

Augmenting carotenoid accumulation by multiplex genome editing of the redundant CCD family in rice.

Plant physiology and biochemistry : PPB, 225:110008.

The biodegradation of carotenoid is carried out and regulated by a family of carotenoid cleavage dioxygenases (CCDs). In rice, potential redundancy of OsCCD1, OsCCD4a, and OsCCD4b, among multiple CCDs, was predicted through in silico protein-ligand docking simulations, which were based on the interactions of diverse carotene and xanthophyll substrates in the active sites. To elucidate the roles of the three CCDs in planta, we generated single, double, and triple knockout (KO) rice lines using CRISPR-Cas9 technology and confirmed their genetic stabilities. Triple KO (osccd1/osccd4a/osccd4b) lines exhibited enhanced carotenoid contents notably in both leaves after the harvesting stage and under dark-induced senescence, verifying that was caused by a simultaneously successful blocking of OsCCD1/OsCCD4a/OsCCD4b activities in these conditions. Transcriptional profiling of this triple KO line revealed downregulation of key genes involved in carotenoid biosynthesis, suggesting a feedback mechanism to regulate carotenoid levels. In order to explore and increase practical agricultural use of this triple KO line, we performed agronomic assessments that showed no adverse effects on major traits such as photosynthetic rate and seed productivity and then developed a T-DNA-free version of this triple KO rice line with high carotenoid content. Our study highlights the capacity of OsCCD1/OsCCD4a/OsCCD4b as promising targets for genome editing in biofortification strategies aimed at improving the functionality of rice and suggests their applicability to other forage crops.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Dong H, Qin Y, Zhang P, et al (2025)

"Turn-on" aptamer-immune lateral flow assays for the detection of small molecule targets based on CHA-assisted and CRISPR/Cas12a mediated signal transduction and amplification.

Biosensors & bioelectronics, 285:117593.

Lateral flow assays (LFAs) have emerged as crucial tools for on-site food safety detection due to their simple operation and intuitive detection results. Nevertheless, LFAs for small molecule targets such as pesticides often present a "Turn-off" signal output, which leads to their low sensitivity and the risk of false positives. In this study, a CRISPR/Cas12a system-mediated strategy was employed to convert aptamer signals into the signals of immune LFAs, achieving a "Turn-on" signal output for highly sensitive detection of small molecule targets. The binding of aptamers to targets released the trigger sequence to initiate the catalytic hairpin assembly (CHA) reaction, generating double-stranded DNA, which subsequently activated the CRISPR/Cas12a system to cleave the FAM-labeled Reporter. Eventually, the "Turn-on" visual output of the signal was realized through an anti-6-FAM immune LFAs. The experiment optimized the sample pool preparation, CHA reaction conditions, CRISPR/Cas12a activation parameters, and the assembly process of the LFAs. The limit of detection for procymidone was as low as 0.015 ng/mL, which was 52.67 times more sensitive than those of conventional aptamer-based LFAs without signal amplification strategies. This method exhibits high specificity for procymidone and a recovery rate ranging from 94.00% to 104.20% in vegetable samples, demonstrating excellent stability and practicability.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Lin L, Xue Y, Tan L, et al (2025)

Micro-scale thermofluidics enable autonomous and scalable CRISPR diagnostics for sexually transmitted infections screening.

Biosensors & bioelectronics, 285:117591.

The development of clustered regularly interspaced short palindromic repeats (CRISPR)-based nucleic acid detection has recently been a center of interest for next-generation molecular diagnostics. Despite considerable advances, simple and effective strategies to harness the isothermal amplification reaction and CRISPR-based detection for maximal performance and minimal complexity are still desirable. Here, a thermofluidic approach leverages the micro-scale chemical and physical mechanism to perform autonomous and scalable CRISPR-based diagnostics (CRISPR-Dx) in a greatly simplified format, which was called "Thermofluidic CRISPR". Originating from the concept of convective PCR, it utilizes looped microchannel reactors to perform approximatively undisturbed isothermal amplification reaction at balanced temperature by virtue of the restricted molecular diffusion across the microchannel, in which the reagents of two reactions are compartmentalized virtually; then it creates circulatory flow within the loop channel to mix the amplificons and CRISPR reagents via Rayleigh-Bénard thermal convection, by simply warming up one side of the loop channel. Due to the simplicity and scalability, a low-cost, battery-powered, portable diagnostic platform, incorporating with smartphone-enabled real-time fluorescence readout, to perform rapid (<30 min), highly sensitive (2 copies per reaction), quantitative and multiplexed CRISPR-Dx was constructed. Its diagnostic performance in rapid screening of multiple pathogens from 196 clinical samples for syndromic testing of sexually transmitted infections was evaluated, exhibiting 97.4 % sensitivity and 100 % specificity benchmarked against the laboratory-based testing. Leveraging the micro-scale chemical and physical mechanism to simplify workflows for CRISPR-Dx may enhance their versatility and facilitate their broader applicability at the point of care.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Huang Y, Li H, Qi L, et al (2025)

NanoCRISPR-assisted biomimetic tissue-equivalent patch regenerates the intervertebral disc by inhibiting endothelial-to-mesenchymal transition.

Biomaterials, 322:123404.

The integrity of the intervertebral disc (IVD), an immune-privileged organ protected by the blood-disc barrier, is compromised following annulus fibrosus (AF) injury. This breach facilitates angiogenesis, immune cell infiltration, and inflammation, accelerating intervertebral disc degeneration (IDD) and resulting in various clinical disorders. Current treatments fail to adequately address biological repair of AF defects and angiogenesis. Single-cell RNA sequencing analyses reveal that vascular endothelial growth factor (VEGF), secreted by IDD-associated fibrochondrocytes, is crucial in promoting angiogenesis by inducing endothelial-to-mesenchymal transition (EndoMT). This study proposes a nano-clustered regularly interspaced short palindromic repeats (CRISPR)-assisted AF patch with an aligned, polydopamine-modified nano-lamellae nanofibrous scaffold that replicates the hierarchical structure of natural AF, providing a conducive microenvironment for AF repair. A zeolitic imidazolate framework-8-based nanoCRISPR system encapsulates the CRISPR/CRISPR-associated protein 9 complex to target and eliminate VEGF-mediated angiogenic factors. In vitro studies demonstrate that the nanoCRISPR-assisted patch can enhance AF cell adhesion and migration, promote extracellular matrix deposition, knock out VEGF expression, and inhibit EndoMT. In vivo studies show its significant efficacy in promoting AF repair, inhibiting abnormal angiogenesis, and delaying IDD progression. This study presents a promising approach for structural and biological AF regeneration, addressing physical and angiogenic barriers in IVD regeneration.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Chen Q, Wang H, Xu H, et al (2025)

One-pot RPA-CRISPR/Cas12a integrated dual-mode electrochemical lateral flow strip for ultrasensitive and precise detection of Salmonella.

Biosensors & bioelectronics, 285:117529.

Rapid and accurate screening of pathogenic contamination is essential for timely intervention and infection prevention. In this work, one-pot RPA-CRISPR/Cas12a strategy combined with an innovative electrochemical lateral flow strip (OPRCC-eLFS) was presented for ultrasensitive and precise detection of Salmonella. Highly sensitive dual-mode detection of Salmonella in various samples has been simultaneously achieved with electrochemical detection limit of 3.84 CFU/mL and visual detection limit of 384 CFU/mL, respectively, with improved detection efficiency and prevention of uncapping-related aerosol-contamination. This dual-mode biosensing platform demonstrates exceptional stability, remarkable sensitivity, and robust on-site quantification capability, emphasizing its potential in food safety monitoring and disease prevention.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Morán Torres JP, Lyu J, Chen X, et al (2025)

Single and combinatorial gene inactivation in Aspergillus niger using selected as well as genome-wide gRNA library pools.

Microbiological research, 298:128204.

Aspergillus niger is a saprotroph, a pathogen, an endophyte, a food spoiler and an important cell factory. Only a minor fraction of its genes has been experimentally characterized. We here set up a CRISPR/Cas9 mutagenesis screen for functional gene analysis using co-transformation of a pool of gene editing plasmids that are maintained under selection pressure and that each contain a gRNA. First, a pool of gRNA vectors was introduced in A. niger targeting five genes with easy selectable phenotypes. Transformants were obtained with all possible single, double, triple, quadruple and quintuple gene inactivation phenotypes. Their genotypes were confirmed using the gRNA sequences in the transforming vector as barcodes. Next, a gRNA library was introduced in A. niger targeting > 9600 genes. Gene nsdC was identified as a sporulation gene using co-transformation conditions that favored uptake of one or two gRNA construct(s) from the genome-wide vector pool. Together, CRISPR/Cas9 vectors with a (genome-wide) pool of gRNAs can be used for functional analysis of genes in A. niger with phenotypes that are the result of the inactivation of a single or multiple genes.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Gao L, Yuan J, Hong K, et al (2025)

Technological advancement spurs Komagataella phaffii as a next-generation platform for sustainable biomanufacturing.

Biotechnology advances, 82:108593.

Biomanufacturing stands as a cornerstone of sustainable industrial development, necessitating a shift toward non-food carbon feedstocks to alleviate agricultural resource competition and advance a circular bioeconomy. Methanol, a renewable one‑carbon substrate, has emerged as a pivotal candidate due to its abundance, cost-effectiveness, and high reduction potential, further bolstered by breakthroughs in CO2 hydrogenation-based synthesis. Capitalizing on this momentum, the methylotrophic yeast Komagataella phaffii has undergone transformative technological upgrades, evolving from a conventional protein expression workhorse into an intelligent bioproduction chassis. This paradigm shift is fundamentally driven by converging innovations across CRISPR-empowered advancement in genome editing and AI-powered metabolic pathway design in K. phaffii. The integration of CRISPR systems with droplet microfluidics high-throughput screening has redefined strain engineering efficiency, achieving much higher editing precision than traditional homologous recombination while compressing the "design-build-test-learn" cycle. Concurrently, machine learning-enhanced genome-scale metabolic models facilitate dynamic flux balancing, enabling simultaneous improvements in product titers, carbon yields, and volumetric productivity. Finally, technological advancement promotes the application of K. phaffii, including directing more efficiently metabolic flux toward nutrient products, and strengthening efficient synthesis of excreted proteins. As DNA synthesis automation and robotic experimentation platforms mature, next-generation breakthroughs in genome modification, cofactor engineering, and AI-guided autonomous evolution will further cement K. phaffii as a next-generation platform for decarbonizing global manufacturing paradigms. This technological trajectory positions methanol-based biomanufacturing as a cornerstone of the low-carbon circular economy.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Liberty JT, Bromage S, Peter E, et al (2025)

CRISPR revolution: Unleashing precision pathogen detection to safeguard public health and food safety.

Methods (San Diego, Calif.), 240:180-194.

Foodborne pathogens represent a significant challenge to global food safety, causing widespread illnesses and economic losses. The growing complexity of food supply chains and the emergence of antimicrobial resistance necessitate rapid, sensitive, and portable diagnostic tools. CRISPR technology has emerged as a transformative solution, offering unparalleled precision and adaptability in pathogen detection. This review explores CRISPR's role in addressing critical gaps in traditional and modern diagnostic methods, emphasizing its advantages in sensitivity, specificity, and scalability. CRISPR-based diagnostics, such as Cas12 and Cas13 systems, enable rapid detection of bacterial and viral pathogens, as well as toxins and chemical hazards, directly in food matrices. Their integration with isothermal amplification techniques and portable biosensors enhances field applicability, making them ideal for decentralized and real-time testing. Additionally, CRISPR's potential extends beyond food safety, contributing to public health efforts by monitoring antimicrobial resistance and supporting One Health frameworks. Despite these advancements, challenges remain, including issues with performance in complex food matrices, scalability, and regulatory barriers. This review highlights future directions, including AI integration for assay optimization, the development of universal CRISPR platforms, and the adoption of sustainable diagnostic solutions. By tackling these challenges, CRISPR has the potential to redefine global food safety standards and create a more resilient food system. Collaborative research and innovation will be critical to fully unlocking its transformative potential in food safety and public health.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Rosengarten H, D'Amore A, Kim HM, et al (2025)

ap4b1 -/- zebrafish demonstrate morphological and motor abnormalities.

Human molecular genetics, 34(12):1034-1039.

OBJECTIVE: Hereditary spastic paraplegia type 47 (SPG47) is caused by biallelic loss-of-function variants in the AP4B1 gene, leading to neurodevelopmental and progressive motor impairment. This study aimed to generate and characterize a zebrafish (Danio rerio) model of SPG47 to investigate the role of ap4b1 in neurodevelopment and motor function.

METHODS: We employed CRISPR/Cas9 gene-editing to generate a stable ap4b1-/- zebrafish line. Behavioral, morphological, and motor function analyses were performed, including survival under stress conditions, spontaneous locomotor activity, light-dark transition assays, and coiling behavior. Axonal length was assessed via immunofluorescence targeting spinal motor neurons. Seizure susceptibility was evaluated using a PTZ paradigm.

RESULTS: ap4b1-/- zebrafish exhibited significantly reduced axonal length of spinal motor neurons, impaired motor function, and developmental malformations, including brachycephaly, reduced body length, bent spines, and craniofacial defects. Increased tail coiling and reduced spontaneous activity were observed in larvae, alongside absent habituation to light-dark stimuli. Under stress conditions, survival rates were significantly lower in the knockout group compared to controls. Despite early hyperexcitability, no significant increase in PTZ-induced seizures was observed.

INTERPRETATION: This study characterizes an ap4b1-/- zebrafish model that recapitulates some phenotypes of SPG47, including motor deficits and morphological abnormalities. These findings support the utility of zebrafish for studying AP-4 deficiency and provide a platform for investigating the molecular mechanisms underlying SPG47.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Thornburg CD, Pipe SW, Cantore A, et al (2025)

Clinical perspective: Advancing hemophilia treatment through gene therapy approaches.

Molecular therapy : the journal of the American Society of Gene Therapy, 33(6):2350-2362.

Hemophilia, a congenital bleeding disorder, can cause arthropathy, impaired mobility, pain, and life-threatening hemorrhage events, significantly impacting quality of life for patients and caregivers. Current therapies, although effective, necessitate costly lifelong treatment, often in specialized settings. However, as a monogenic disorder caused by loss-of-function genetic variants, hemophilia is amenable to gene therapy. In this article, three primary gene therapy approaches at the forefront of clinical development are reviewed. Adeno-associated virus-based gene therapy, having secured approval in the EU, UK, and US after promising phase 3 trial results, demonstrates clear superiority over standard-of-care treatment. Lentivirus-based approaches capable of transducing dividing and nondividing cells may improve the durability of treatment and have low susceptibility to pre-existing neutralizing antibodies to viral vectors. Finally, gene editing techniques such as zinc finger nucleases and CRISPR aim to correct genetic defects directly, holding promise as novel, effective, and highly durable therapeutic strategies in adults and children with hemophilia. This review provides a comprehensive summary of the current status of these gene therapy approaches, highlighting advantages, limitations, and potential future developments.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Sogabe S, Nakano H, Ogasahara Y, et al (2025)

Regulation of MCCC1 expression by a Parkinson's disease-associated intronic variant: implications for pathogenesis.

Journal of human genetics, 70(7):371-374.

Parkinson's disease (PD) is a common neurodegenerative disorder characterized by dopaminergic neuron loss and α-synuclein aggregation. While some familial cases result from single-gene mutations, most are sporadic, involving complex genetic and environmental interactions. Among PD risk loci identified through genome-wide association studies, MCCC1 encodes a mitochondrial enzyme essential for leucine catabolism; however, the causal variant remains unclear. Here, we investigated whether the intronic variant rs12637471 regulates MCCC1 mRNA expression and influences PD risk. Postmortem brain analysis revealed significantly elevated MCCC1 mRNA levels in G-allele carriers, consistent with peripheral tissue eQTL data from GTEx. Using CRISPR/Cas9-edited induced pluripotent stem cells, we generated isogenic lines differing only at rs12637471 and observed increased MCCC1 expression in G-allele dopaminergic neurons. Given MCCC1's mitochondrial role, its dysregulation may impact mitochondrial homeostasis, autophagy, or inflammation, potentially contributing to PD pathogenesis.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Hou Z, Yi Q, Wu M, et al (2025)

Assessment and Mitigation of CRISPR-Cas9-Induced Nontargeted Translocations.

Advanced science (Weinheim, Baden-Wurttemberg, Germany), 12(21):e2414415.

The performance of CRISPR-mediated genome editing near inverted repeats (IRs) potentially results in chromosomal translocations and other catastrophic rearrangements. However, the extent of this risk may be significantly underestimated because current reporter systems focus solely on site-specific translocations. Here, trans-acting reporter systems in Escherichia coli are developed to detect nontargeted translocations. Markedly increased frequency of translocations following CRISPR-Cas9 activation is observed, with the magnitude determined primarily by the length of the IRs and the proximity between Cas9 target sites and IRs. These translocations arise through a combination of intramolecular single-strand annealing and alternative end-joining mechanisms. Furthermore, it is discovered that introducing segments homologous to IR loci can substantially mitigate nontargeted translocations without significantly compromising CRISPR-Cas9-mediated editing. The study provides valuable insights into the genetic risks associated with CRISPR technologies and suggests a viable strategy for developing genetically safer CRISPR systems.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Tajer BJ, Kalu G, Jay S, et al (2025)

Optimized toolkit for the manipulation of immortalized axolotl fibroblasts.

Methods (San Diego, Calif.), 240:21-34.

The axolotl salamander model has broad utility for regeneration studies, but this model is limited by a lack of efficient cell-culture-based tools. The Axolotl Limb-1 (AL-1) fibroblast line, the only available immortalized axolotl cell line, was first published over 20 years ago, but many established molecular biology techniques, such as lipofectamine transfection, CRISPR-Cas9 mutagenesis, and antibiotic selection, work poorly or remain untested in AL-1 cells. Innovating technologies to manipulate AL-1 cells in culture and study their behavior following transplantation into the axolotl will complement in-vivo studies, decrease the number of animals used, and enable the faster, more streamlined investigation of regenerative biology questions. Here, we establish transfection, mutagenesis, antibiotic selection, and in-vivo transplantation techniques in axolotl AL-1 cells. These techniques will enable efficient culture with AL-1 cells and guide future tool development for the culture and manipulation of other salamander cell lines.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Boccacci Y, Dumont N, Doyon Y, et al (2025)

CRISPR-Cas9-driven antigen conversion of clinically relevant blood group systems.

Human molecular genetics, 34(12):1001-1008.

The common practice of blood transfusion entirely relies on blood donations from the population. Ensuring blood group compatibility between a donor and a recipient is paramount to prevent critical adverse reactions. Finding compatible blood can be challenging given the high diversity of blood group antigens, especially for chronically transfused patients at higher risk of alloimmunization owing to repeated exposures to foreign RBCs. In addition, due to the immunogenicity of the ABO blood group and the highly polymorphic nature of the Rhesus (Rh) system, they both remain of prime importance in transfusion medicine. Cultured red blood cells (cRBCs) may eventually provide an alternative for blood donations-at least in some circumstances. Combining cRBCs with blood group gene editing could broaden transfusion accessibility by making antigen expression compatible with rare phenotypes, thus meeting the needs of more patients. Starting from mobilized, erythroid-primed hematopoietic stem and progenitor cells (HSPCs), we used virus- and selection-free, CRISPR-Cas9-mediated knockouts to produce erythroid cells devoid of AB and Rh antigen. The approach yielded almost complete conversion to O- and RhNull phenotypes, as determined by standard hemagglutination and flow cytometry analyses. Combined with robust cRBC protocols, these clinically relevant phenotypic changes could eventually expand the accessibility of blood transfusion for specific and unmet clinical needs.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Chen KY, Kibayashi T, Giguelay A, et al (2025)

Genome-wide CRISPR screen in human T cells reveals regulators of FOXP3.

Nature, 642(8066):191-200.

Regulatory T (Treg) cells, which specifically express the master transcription factor FOXP3, have a pivotal role in maintaining immunological tolerance and homeostasis and have the potential to revolutionize cell therapies for autoimmune diseases[1-3]. Although stimulation of naive CD4[+] T cells in the presence of TGFβ and IL-2 can induce FOXP3[+] Treg cells in vitro (iTreg cells), the resulting cells are often unstable and have thus far hampered translational efforts[4-6]. A systematic approach towards understanding the regulatory networks that dictate Treg differentiation could lead to more effective iTreg cell-based therapies. Here we performed a genome-wide CRISPR loss-of-function screen to catalogue gene regulatory determinants of FOXP3 induction in primary human T cells and characterized their effects at single-cell resolution using Perturb-icCITE-seq. We identify the RBPJ-NCOR repressor complex as a novel, context-specific negative regulator of FOXP3 expression. RBPJ-targeted knockout enhanced iTreg differentiation and function, independent of canonical Notch signalling. Repeated cytokine and T cell receptor signalling stimulation in vitro revealed that RBPJ-deficient iTreg cells exhibit increased phenotypic stability compared with control cells through DNA demethylation of the FOXP3 enhancer CNS2, reinforcing FOXP3 expression. Conversely, overexpression of RBPJ potently suppressed FOXP3 induction through direct modulation of FOXP3 histone acetylation by HDAC3. Finally, RBPJ-ablated human iTreg cells more effectively suppressed xenogeneic graft-versus-host disease than control iTreg cells in a humanized mouse model. Together, our findings reveal novel regulators of FOXP3 and point towards new avenues to improve the efficacy of adoptive cell therapy for autoimmune disease.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Liu D, Cao D, R Han (2025)

Recent advances in therapeutic gene-editing technologies.

Molecular therapy : the journal of the American Society of Gene Therapy, 33(6):2619-2644.

The advent of gene-editing technologies, particularly CRISPR-based systems, has revolutionized the landscape of biomedical research and gene therapy. Ongoing research in gene editing has led to the rapid iteration of CRISPR technologies, such as base and prime editors, enabling precise nucleotide changes without the need for generating harmful double-strand breaks (DSBs). Furthermore, innovations such as CRISPR fusion systems with DNA recombinases, DNA polymerases, and DNA ligases have expanded the size limitations for edited sequences, opening new avenues for therapeutic development. Beyond the CRISPR system, mobile genetic elements (MGEs) and epigenetic editors are emerging as efficient alternatives for precise large insertions or stable gene manipulation in mammalian cells. These advances collectively set the stage for next-generation gene therapy development. This review highlights recent developments of genetic and epigenetic editing tools and explores preclinical innovations poised to advance the field.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Kamran M, MT Waters (2025)

Engineering crop resilience with synthetic gene circuits.

Trends in plant science, 30(6):582-584.

Engineering crops to withstand environmental stresses is critical for addressing climate change and food insecurity. Recently, Khan et al. developed CRISPR interference (CRISPRi)-based synthetic gene circuits to program gene expression in plants. Their findings highlight the potential of these circuits to advance the development of stress-resilient crops.

RevDate: 2025-06-05
CmpDate: 2025-06-05

Liu W, Pan Y, Zhang Y, et al (2025)

Intracellularly synthesized ssDNA for continuous genome engineering.

Trends in biotechnology, 43(6):1356-1370.

Despite the prevalence of genome editing tools, there are still some limitations in dynamic and continuous genome editing. In vivo single-stranded DNA (ssDNA)-mediated genome mutation has emerged as a valuable and promising approach for continuous genome editing. In this review, we summarize the various types of intracellular ssDNA production systems and notable achievements in genome engineering in both prokaryotic and eukaryotic cells. We also review progress in the development of applications based on retron-based systems, which have demonstrated significant potential in molecular recording, multiplex genome editing, high-throughput functional variant screening, and gene-specific continuous in vivo evolution. Furthermore, we discuss the major challenges of ssDNA-mediated continuous genome editing and its prospects for future applications.

RevDate: 2025-06-02
CmpDate: 2025-05-30

Hu H, Guo S, Li Y, et al (2025)

Spatially blocked split CRISPR-Cas12a system for ultra-sensitive and versatile small molecule activation and detection.

Nature communications, 16(1):5035.

Detecting small molecules is pivotal across fields like clinical diagnostics, environmental monitoring, and food safety. The CRISPR-Cas12a system, known for its simplicity and sensitivity, offers a promising basis for small molecule detection. However, current CRISPR-based detection methods face challenges, including complex design requirements, high background noise, and limited adaptability to different targets. In our study, we introduce the SBS-Cas system, leveraging a split crRNA mode to induce spatial hindrance on the scaffold strand through molecular binding. This approach prevents the assembly with Cas12a, effectively masking its trans-cleavage activity. By introducing small molecules that competitively bind to the macromolecule, we eliminate this spatial hindrance, activating Cas12a. Our results demonstrate high sensitivity, versatility, and adaptability in small molecule detection across multiple reactions, with successful intracellular imaging and responsive fluctuations in complex environments underscoring the system's robustness. This innovative CRISPR-Cas12a-based approach establishes a low-background, highly sensitive platform for small molecule detection. SBS-Cas promises not only to enhance tools for clinical, environmental, and food safety applications but also to advance CRISPR research, providing insights and expanding possibilities in molecular detection science.

RevDate: 2025-06-02
CmpDate: 2025-05-30

Liang R, Wang S, Cai Y, et al (2025)

Circular RNA-mediated inverse prime editing in human cells.

Nature communications, 16(1):5057.

Prime editors are restricted to performing precise edits downstream of cleavage sites, thereby limiting their editing scope. Therefore, we develop inverse prime editors (iPEs) that act upstream of the nickase cleavage site by replacing nCas9-H840A with nCas9-D10A, but the editing efficiencies are limited. To address this limitation, we develop circular RNA-mediated iPEs (ciPEs), achieving editing efficiencies ranging from 0.1% to 24.7%. Further optimization using Rep-X helicase increases editing efficiencies to a range of 2.7%-55.4%. The Rep-X-assisted ciPE system thus expands the scope of editing and improves efficiencies at genomic sites that are previously difficult to target. The Rep-X-assisted ciPE system will complement canonical PE system in enabling more extensive and efficient editing across a wider range of the human genome.

RevDate: 2025-05-30

Yu T, Zou S, Long Y, et al (2025)

Glass fiber-interfaced CRISPR/Cas biosensing adaptable for diverse biomarker detection.

Trends in biotechnology pii:S0167-7799(25)00167-2 [Epub ahead of print].

Developing a generic sensitive platform for detecting diverse biomarkers is essential for a comprehensive understanding of disease states, guiding precision medicine. Herein, we introduce a versatile platform based on glass fiber interfaced CRISPR/Cas with a universal reagent setting (g-CURS), which used a fixed pair of CRISPR RNA (crRNA) and a single-stranded DNA (ssDNA) activator to enable detection of multiple nucleic acids or proteins with ultrahigh sensitivity. The fixed ssDNA activator was labeled on multiple specific ligation products or detection antibodies conjugated on glass fiber to initiate CRISPR/Cas12a-assisted rapid and exponential cascade amplification through circular reporters (CRs), generating fluorescence signals readable by a portable detector. g-CURS was able to detect viral nucleic acids with attomolar sensitivity within 30 min and multiple low-abundance proteins in extracellular vesicles of Parkinson's disease (PD) serum with subpicomolar sensitivity within 80 min. g-CURS simplifies CRISPR/Cas biosensing using a standard reagent setting, holding promise for biomarker discovery free from bulky instruments.

RevDate: 2025-05-30
CmpDate: 2025-05-30

Gao Y, Li Y, Gao Q, et al (2025)

Multi-functional dumbbell DNA probe design and its application in signal amplification cascade -based assay of human immunodeficiency virus.

Analytica chimica acta, 1362:344141.

Sensitive assay of Human immunodeficiency virus (HIV) is the premise of accurate prevention and con-trol of AIDS. Dumbbell DNA showed promising potential in biosensing, imaging applications. This study presents a highly sensitive biosensing platform integrating dumbbell-shaped DNA probes with rolling circle transcription (RCT)-regulated CRISPR-Cas12a to achieve cascade signal amplification. The arrangement of the functional regions in the same unclosed dumbbell probes (UDPs) might affect final performance in the biosensor. Three different types UDPs (A/B/C) were specifically designed and the performances of the UDPs were evaluated in the RCT-CRISPR based cascade platform. Among these, type A UDP shows the best performance with a detection limit of 44.8 aM targeting HIV-DNA as well as high sensitivity and specificity. Also, type A UDP had the best behavior in the clinical sample assay. The difference of UDPs' performance might attribute to the variation of opening form of the UDPs considering the arrangement of various functional regions. The platform's modular design supports customization for diverse nucleic acid targets, making it adaptable for early disease detection and precision diagnostics.

RevDate: 2025-05-30
CmpDate: 2025-05-30

Lamperis SM, McMahon KM, Calvert AE, et al (2025)

CRISPR screen reveals a simultaneous targeted mechanism to reduce cancer cell selenium and increase lipid oxidation to induce ferroptosis.

Proceedings of the National Academy of Sciences of the United States of America, 122(22):e2502876122.

Ferroptosis is a cell death mechanism distinguished by its dependence on iron-mediated lipid oxidation. Cancer cells highly resistant to conventional therapies often demonstrate lipid metabolic and redox vulnerabilities that sensitize them to cell death by ferroptosis. These include a unique dependency on the lipid antioxidant selenoenzyme, glutathione peroxidase 4 (GPx4), that acts as a ferroptosis inhibitor. Synthetic high-density lipoprotein-like nanoparticle (HDL NP) targets the high-affinity HDL receptor scavenger receptor class B type 1 (SR-B1) and regulates cell and cell membrane lipid metabolism. Recently, we reported that targeting cancer cell SR-B1 with HDL NP depleted cell GPx4, which is accompanied by increased cell membrane lipid peroxidation and cancer cell death. These data suggest that HDL NP may induce ferroptosis. Thus, we conducted an unbiased CRISPR-based positive selection screen and target validation studies in ovarian clear cell carcinoma (OCCC) cell lines to ascertain the mechanism through which HDL NP regulates GPx4 and kills cancer cells. The screen revealed two genes, acyl-CoA synthetase long chain family member 4 (ACSL4) and thioredoxin reductase 1 (TXNRD1), whose loss conferred resistance to HDL NP. Validation of ACSL4 supports that HDL NP induces ferroptosis as the predominant mechanism of cell death, while validation of TXNRD1 revealed that HDL NP reduces cellular selenium and selenoprotein production, most notably, GPx4. Accordingly, we define cancer cell metabolic targets that can be simultaneously actuated by a multifunctional, synthetic HDL NP ligand of SR-B1 to kill cancer cells by ferroptosis.

RevDate: 2025-05-30
CmpDate: 2025-05-30

Hashemi M, Khanaghah XM, JS Nahand (2025)

The CRISPR-Cas revolution in head and neck cancer: a new era of targeted therapy.

Functional & integrative genomics, 25(1):113.

Head and neck cancer (HNC) encompasses a diverse array of malignancies impacting the anatomical structures of the head and neck region, ranking as the seventh most prevalent cancer type globally. The occurrence and advancement of HNC are intricately linked to mutations and disruptions within critical signaling pathways, accentuating the imperative for targeted therapeutic interventions to rectify these genetic aberrations. Traditional treatment modalities, including surgical intervention and adjuvant chemotherapy or radiotherapy, frequently culminate in considerable morbidity and suboptimal prognoses. Recently, the CRISPR-Cas system has emerged as a revolutionary gene-editing platform, poised to redefine therapeutic approaches in gene therapy and oncological research. Despite its potential, CRISPR-Cas faces challenges such as off-target effects, delivery inefficiencies, and immunogenicity, which must be addressed for clinical success. This review meticulously evaluates the progress in CRISPR-Cas technologies aimed at targeting essential signaling pathways implicated in HNC, addressing current challenges while highlighting optimal targets, Cas nucleases, and innovative delivery mechanisms, thereby elucidating the therapeutic potential and clinical applicability of the CRISPR-Cas paradigm in the management of HNC.

RevDate: 2025-06-02
CmpDate: 2025-05-29

Ma S, Liao K, Chen K, et al (2025)

hpCasMINI: An engineered hypercompact CRISPR-Cas12f system with boosted gene editing activity.

Nature communications, 16(1):5001.

Compact CRISPR-Cas systems have demonstrated potential for effective packaging into adeno-associated viruses (AAVs) for use in gene therapy. However, their applications are currently limited due to modest gene-editing activity. Here we introduce an engineered compact CRISPR-Cas12f (hpCasMINI, 554 aa), with hyper editing efficiency in mammalian cells via adding an α-helix structure to the N-terminus of an Un1Cas12f1 variant CasMINI (529 aa). The hpCasMINI system boosts gene activation and DNA cleavage activity with about 1.4-3.0-fold and 1.1-19.5-fold, respectively, and maintains the high specificity when compared to CasMINI. In addition, the system can activate luciferase reporter gene and endogenous Fgf21 gene in adult mouse liver, as well as construct liver tumorigenesis model via disrupting Trp53 and Pten genes and inserting oncogenic Kras[G12D] into the Trp53 locus. When compared to SpCas9 and LbCas12a, hpCasMINI displays higher gene activation and exhibits higher DNA cleavage specificity, although with lower activity, at the tested sites. Moreover, with a similar strategy, we engineer compact versions of hpOsCas12f1 (458 aa) from enOsCas12f1 and hpAsCas12f1 (447 aa) from AsCas12f1-HKRA, both of which display increased DNA cleavage activity, with hpAsCas12f1 also showing improved gene activation capability. Therefore, we develop activity-increased miniature hpCasMINI, hpOsCas12f1 and hpAsCas12f1 nucleases, which hold great potential for gene therapy in the future.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Guo Y, Guo W, Li C, et al (2025)

Fe3O4@Au Nanoparticle-Enabled Magnetic Separation Coupled with CRISPR/Cas12a for Ultrasensitive Detection of Foodborne Pathogens.

Journal of agricultural and food chemistry, 73(22):13949-13959.

The rapid detection of foodborne pathogens, such as Staphylococcus aureus and Salmonella, is critical for ensuring food safety. Herein, we present a magnetically controlled electrochemical biosensor integrating CRISPR/Cas12a with Fe3O4@Au nanoparticles designed to achieve ultrasensitive and multiplexed detection. By utilization of the magnetic separation of CRISPR-cleaved ssDNA from Fe3O4@Au nanoparticles, the sensor circumvents intricate electrode modifications, enabling direct signal readout. This approach expedites the workflow to 65 min while achieving a detection limit of 2 CFU/mL. Additionally, the sensor exhibits signal stability over 45 days and demonstrates its versatility by enabling the separate detection of both Gram-positive (S. aureus) and Gram-negative (Salmonella) pathogens. With validation in milk samples with high interference resistance, this platform bridges CRISPR programmability with practical deployability, offering a robust solution for on-site monitoring. The innovation lies in its simplified design, enhanced stability, and clinical versatility, setting a new benchmark for rapid, low-cost pathogen detection in resource-limited environments.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Pulito C, Vaccarella S, Palcau AC, et al (2025)

MicroRNA-mediated PTEN downregulation as a novel non-genetic mechanism of acquired resistance to PI3Kα inhibitors of head & neck squamous cell carcinoma.

Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy, 81:101251.

AIMS: Head and neck squamous cell carcinomas (HNSCCs) frequently harbor alterations in the PI3K signalling axis and, particularly, in the PIK3CA gene. The promising rationale of using PI3K inhibitors for the treatment of HNSCC has, however, clashed with the spontaneous development of resistance over time.

METHODS: To identify valuable targets for overcoming acquired resistance to PI3Kα inhibitors in HNSCC, we performed microRNA profiling on a cohort of HNSCC PDXs that were treated with alpelisib, including both responsive and resistant tumors. Using CRISPR/Cas9, siRNA, and PTEN-/- isogenic and alpelisib-resistant cell models, we examined the role of PTEN in resistance acquisition. Phospho-proteomic analysis identified PTEN-dependent phosphorylation events, while PI3Kα inhibitor-resistant organoids were used to assess PLK1 inhibitor efficacy.

RESULTS: We identified microRNAs altered in resistant PDXs, including members of the miR-17-92 cluster. Mechanistically, we observed that the hyperactive c-Myc was recruited to MIR17HG regulatory regions in alpelisib-resistant cells, sustaining miR-17-5p, miR-19b-3p, and miR-20a-5p expression, which downregulated PTEN. PTEN knockout or depletion conferred alpelisib resistance in HNSCC cells. We identified PTEN-dependent phosphorylation events, such as p-PLK1-T210, involved in resistance. Interestingly, pharmacological inhibition of PLK1 strongly reduced the viability of PI3Kα-resistant organoids derived from HNSCC PDXs and cell line models.

CONCLUSION: Overall, this study unveils a novel, microRNA-driven, non-genetic mechanism contributing to acquired resistance to PI3Kα inhibitors in HNSCC. Indeed, linking hyperactive c-Myc to sustain miR-17-92 expression and consequent PTEN downregulation, we also propose that targeting PTEN-dependent downstream effectors, such as PLK1, may offer a powerful therapeutic strategy for resistant HNSCC.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Li C, Peng X, Zhang Z, et al (2025)

Establishment of Agrobacterium-mediated genetic transformation and CRISPR/Cas9-guided gene editing in Elymus nutans.

Journal of plant physiology, 310:154513.

Elymus nutans, an allohexaploid (2n = 6x = 42) species with a StStHHYY genome, is a native perennial in the alpine grasslands of the Qinghai-Xizang Plateau, and has been widely used for artificial pasture and ecological restoration as a forage grass with highest yield on the plateau. Nevertheless, the lack of a stable transformation system has impeded further efforts to trait improvement of E. nutans. In the present study, we established a reliable Agrobacterium-mediated genetic transformation system for E. nutans, and successfully generated EnTCP4-edited plants using the CRISPR/Cas9 system. The editing efficiency achieved 19.23 % in E. nutans. Knocking out EnTCP4 significantly delayed flowering and enhanced water-deficit stress resistance. This research represents a significant breakthrough in the genetic transformation and gene editing of E. nutans, laying a technological foundation to gain insight into gene functions and molecular breeding in E. nutans.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Huang J, Ding K, Chen J, et al (2025)

Comparison of CRISPR-Cas9, CRISPR-Cas12f1, and CRISPR-Cas3 in eradicating resistance genes KPC-2 and IMP-4.

Microbiology spectrum, 13(6):e0257224.

UNLABELLED: Bacterial plasmid encoding antibiotic resistance could be eradicated by various CRISPR systems, such as CRISPR-Cas9, Cas12f1, and Cas3. However, the efficacy of these gene editing tools against bacterial resistance has not been systematically assessed and compared. This study eliminates carbapenem resistance genes KPC-2 and IMP-4 via CRISPR-Cas9, Cas12f1, and Cas3 systems, respectively. The eradication efficiency of the three CRISPR systems was evaluated. First, the target sites for the three CRISPR systems were designed within the regions 542-576 bp of the KPC-2 gene and 213-248 bp of the IMP-4 gene, respectively. The recombinant CRISPR plasmids were transformed into Escherichia coli carrying KPC-2 or IMP-4-encoding plasmid. Colony PCR of transformants showed that KPC-2 and IMP-4 were eradicated by the three different CRISPR systems, and the elimination efficacy was both 100.00%. The drug sensitivity test results showed that the resistant E. coli strain was resensitized to ampicillin. In addition, the three CRISPR plasmids could block the horizontal transfer of drug-resistant plasmids, with a blocking rate as high as 99%. Importantly, a qPCR assay was performed to analyze the copy number changes of drug-resistant plasmids in E. coli cells. The results indicated that CRISPR-Cas3 showed higher eradication efficiency than CRISPR-Cas9 and Cas12f1 systems.

IMPORTANCE: With the continuous development and application of CRISPR-based resistance removal technologies, CRISPR-Cas9, Cas12f1, and Cas3 have gradually come into focus. However, it remains uncertain which system exhibits more potent efficacy in the removal of bacterial resistance. This study verifies that CRISPR-Cas9, Cas12f1, and Cas3 can eradicate the carbapenem-resistant genes KPC-2 and IMP-4 and restore the sensitivity of drug-resistant model bacteria to antibiotics. Among the three CRISPR systems, the CRISPR-Cas3 system showed the highest eradication efficiency. Although each system has its advantages and characteristics, our results provide guidance on the selection of the CRISPR system from the perspective of resistance gene removal efficiency, contributing to the further application of CRISPR-based bacterial resistance removal technologies.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Yang X, Luo Y, Su C, et al (2025)

Ultra-sensitive biosensor detection of microRNA based on the CRISPR/Cas12a system and exonuclease-assisted target recycling signal amplification.

Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 41(6):867-876.

MicroRNAs (miRNAs) are essential regulators of gene expression and are significantly involved in both preventing and treating a range of diseases. To that end, we developed an ultra-sensitive detection method for miRNA-141 by integrating exonuclease-assisted target recycling signal amplification with the CRISPR/Cas12a system. This method employs a variable hairpin probe (HP) designed to hybridize with miRNA, which, under the action of exonuclease III (ExoIII), cleaves the hairpin probe and triggers target recycling signal amplification. This results in the formation of output DNAs (ODs) containing multiple repeat sequences. The CRISPR/Cas12a system identifies these repeated sequences in ODs through its crRNA component, which in turn triggers the trans-cleavage function of the Cas12a/crRNA complex. It leads to the cleavage of a fluorescently quenched reporter probe. Consequently, this process restores fluorescence, producing a significantly enhanced fluorescent signal that facilitates the detection of miRNA-141, achieving a detection threshold down to 62 fM. This detection approach can specifically differentiate miRNA-141 from other confounding substances and has effectively identified low concentrations of miRNA-141 in actual sample human serum and diverse cancer cell lysates, showcasing its capability for tracing various nucleic acid biomarkers at minimal levels.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Zou W, Huo B, Tu Y, et al (2025)

Metabolic reprogramming by chemo-gene co-delivery nanoparticles for chemo-immunotherapy in head and neck squamous cell carcinoma.

Acta biomaterialia, 199:361-373.

The therapeutic effects of platinum-based drugs are closely linked to the dysregulation of tumor metabolic-immune microenvironment, particularly aberrant lactate accumulation. Herein, we engineered multifunctional nanoparticles (PPPt[IV] NPs) through electrostatic self-assembly of poly(β-amino ester) to co-encapsulate a cisplatin prodrug (Pt[IV]) and CRISPR/Cas9-PKM2 plasmids. Mechanistically, PPPt[IV] NPs efficiently entered cells via endocytosis, followed by escape from lysosomal degradation and cargo release. The reduction of Pt[IV] prodrug to active Pt[II] via GSH depletion induced DNA damage and ROS upregulation, thereby triggering apoptosis. Concurrently, CRISPR/Cas9-mediated PKM2 knockdown suppressed the Warburg effect, resulting in reduced lactate production and downregulated expression of HIF-1α and PD-L1. These alterations drove immune microenvironment remodeling through enhanced dendritic cell maturation, polarized M1 macrophages, and altered cytokine profiles (characterized by upregulation of IFN-γ, TNF-α, and IL-12 alongside suppression of IL-10), ultimately activating T cell-mediated antitumor immunity. Compared to conventional cisplatin, PPPt[IV] NPs demonstrated superior efficacy against both primary and recurrent tumors while reducing nephrotoxicity through synergistic chemo-immunotherapeutic effects, offering a valuable strategy for HNSCC treatment. STATEMENT OF SIGNIFICANCE: This study engineered an innovative nanoplatform (PPPt[IV]) that synergistically integrates a Pt[IV] prodrug with a CRISPR/Cas9-PKM2 plasmid for treating head and neck squamous cell carcinoma. By simultaneously enhancing DNA damage and reversing lactate-mediated immunosuppression, PPPt[IV] nanoplatform achieved chemo-immunotherapy that showed greater suppression of primary and recurrent tumors with reduced renal toxicity compared to cisplatin. This nanotechnology-driven strategy provides valuable insights into the combination of platinum-based drugs with immunometabolic interventions.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Rahimian E, Koochak M, Traikov S, et al (2025)

A quiescence-like/TGF-β1-specific CRISPRi screen reveals drug uptake transporters as secondary targets of kinase inhibitors in AML.

Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy, 81:101242.

Relapse in acute myeloid leukemia (AML) is driven by resistant subclones that survive chemotherapy. It is assumed that these resilient leukemic cells can modify their proliferative behavior by entering a quiescent-like state, similar to healthy hematopoietic stem cells (HSCs). These dormant cells can evade the effects of cytostatic drugs that primarily target actively dividing cells. Although quiescence has been extensively studied in healthy hematopoiesis and various solid cancers, its role in AML has remained unexplored. In this study, we applied an HSC-derived quiescence-associated gene signature to an AML patient cohort and found it to be strongly correlated with poor prognosis and active TGF-β signaling. In vitro treatment with TGF-β1 induces a quiescence-like phenotype, resulting in a G0 shift and reduced sensitivity to cytarabine. To find potential therapeutic targets that prevent AML-associated quiescence and improve response to cytarabine, we conducted a comprehensive CRISPR interference (CRISPRi) screen combined with TGF-β1 stimulation. This approach identified TGFBR1 inhibitors, like vactosertib, as effective agents for preventing the G0 shift in AML cell models. However, pretreatment with vactosertib unexpectedly induced complete resistance to cytarabine. To elucidate the underlying mechanism, we performed a multi-faceted approach combining a second CRISPRi screen, liquid chromatography-tandem mass spectrometry (LC-MS/MS), and in silico analysis. Our findings revealed that TGFBR1 inhibitors unintentionally target the nucleoside transporter SLC29A1 (ENT1), leading to reduced intracellular cytarabine levels. Importantly, we found that this drug interaction is not unique to TGFBR1 inhibitors, but extends to other clinically significant kinase inhibitors, such as the FLT3 inhibitor midostaurin. These findings may have important implications for optimizing combination therapies in AML treatment.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Grubben J, Bijsterbosch G, Aktürk B, et al (2025)

CRISPR/Cas9-induced breaks are insufficient to break linkage drag surrounding the ToMV locus of Solanum lycopersicum.

G3 (Bethesda, Md.), 15(6):.

Despite the success of CRISPR/Cas9 in inducing DNA double-strand breaks for genome editing, achieving targeted recombination in somatic cells remains challenging, particularly at recombination cold spots like the tomato mosaic virus (ToMV) resistance locus in Solanum lycopersicum. We investigated the potential of CRISPR/Cas9-induced targeted recombination in somatic cells to overcome linkage drag surrounding the ToMV locus. We employed two strategies: first, inducing double-strand breaks in both alleles of F1 tomato seedlings to promote nonhomologous end joining and homology-directed repair; second, targeting a single allele in a heterozygous background to induce homology-directed repair in seedlings. CRISPR/Cas9 activity was confirmed in F1 seedlings by detecting nonhomologous end joining-mediated mutations at the target sites in ToMV. We developed a bioinformatics pipeline to identify targeted recombinants by analyzing SNPs between parental haplotypes, allowing precise tracking of SNP variations. A two-dimensional pooling strategy was employed to distinguish genuine recombination events from PCR artifacts. Despite these advances and the active CRISPR/Cas9 system in F1 progeny, no reliable targeted recombinations were found. We extended our research to protoplasts to assess whether CRISPR/Cas9 could induce targeted recombination under different cellular conditions at the same locus. Consistent with our findings in F1 plants, we observed no increase in recombinant patterns compared to wild-type controls in protoplasts. Our findings suggest that CRISPR/Cas9-induced DSBs were insufficient to break the genetic linkage at the ToMV locus on chromosome 9 at a detectable level.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Dunipace L, McGehee JM, Irizarry J, et al (2025)

The proximal enhancer of the snail gene mediates negative autoregulatory feedback in Drosophila melanogaster.

Genetics, 230(2):.

Autoregulatory feedback is a mechanism in which a gene product regulates its own expression, stabilizing gene activity amid noise and environmental changes. In Drosophila melanogaster, the gene snail encodes a key transcriptional repressor that regulates the expression of many genes during early embryogenesis, including its own expression. This study focuses on Snail occupancy at both distal and proximal enhancers of the snail gene to understand the cis-regulatory mechanisms involved in autoregulatory control. The coordinated action of these enhancers results in precisely constrained levels of snail expression during early embryogenesis. Using genome editing by CRISPR/Cas9, we found that deletion of each enhancer individually is compatible with embryonic viability under normal conditions. However, the double mutant is lethal, suggesting a functional interplay between the 2 enhancers. To gain further insight, we assayed snail gene expression levels in fixed embryos. Our results revealed that negative autoregulation of snail relies on the proximal enhancer. Moreover, increasing the affinity of binding sites for Dorsal, a transcriptional activator, in the proximal enhancer impaired this autoregulation, suggesting that Snail acts locally to counterbalance Dorsal's input. A mathematical model of snail autoregulatory control further supports our findings, reinforcing the view that the proximal enhancer mediates negative autoregulatory feedback, and implicating the distal enhancer in positive autoregulatory feedback. In summary, Snail's role at the proximal enhancer is pivotal for negative autoregulatory control and essential for balancing the activation mediated by the distal enhancer.

RevDate: 2025-06-04
CmpDate: 2025-06-04

Deivarajan HR, Chelliah D, Sethupathy Ramkumar P, et al (2025)

Clinical Utility of CRISPR-Based RID-MyC Assay in Smear and Culture-Negative Fungal Keratitis: A Case Series.

Cornea, 44(7):921-924.

PURPOSE: To assess the clinical utility of the clustered regularly interspaced short palindromic repeats/Cas12a-based RID-MyC assay in diagnosing fungal keratitis (FK) in cases where conventional smear and culture methods fail to identify the causative pathogen.

METHODS: This retrospective case series included 5 patients with clinically suspected FK and negative smear and culture results who were evaluated in the Cornea Department at Aravind Eye Hospital, Coimbatore, India, between January 1, 2024, and March 31, 2024. The primary outcome was the diagnostic performance of the RID-MyC assay in detecting fungal nucleic acids in cases of suspected FK with negative smear and culture results. In vivo confocal microscopy served as a reference standard to validate the RID-MyC assay findings.

RESULTS: The RID-MyC assay successfully detected fungal nucleic acids in 3 cases, corroborated by in vivo confocal microscopy findings suggestive of fungal filaments, leading to targeted antifungal therapy and resolution of the infections. In addition, 2 cases tested negative for fungal nucleic acids, aligning with clinical and confocal evidence of nonfungal etiology, thus guiding appropriate alternative treatments that led to clinical improvement.

CONCLUSIONS: The RID-MyC assay demonstrates clinical utility in diagnosing FK in scenarios where conventional smear and culture methods prove inadequate, such as in cases with prior antifungal therapy or polymicrobial infections. This assay facilitates accurate diagnosis and timely initiation of appropriate antifungal treatment without the need for sophisticated equipment or expertise, making it particularly valuable in resource-limited settings.

RevDate: 2025-05-29

Zhang R, Zhou Q, Huang S, et al (2025)

Advancements in CRISPR-Cas-based strategies for combating antimicrobial resistance.

Microbiological research, 298:128232 pii:S0944-5013(25)00188-0 [Epub ahead of print].

Multidrug resistance (MDR) in bacteria presents a significant global health threat, driven by the widespread dissemination of antibiotic-resistant genes (ARGs). The CRISPR-Cas system, known for its precision and adaptability, holds promise as a tool to combat antimicrobial resistance (AMR). Although previous studies have explored the use of CRISPR-Cas to target bacterial genomes or plasmids harboring resistance genes, the application of CRISPR-Cas-based antimicrobial therapies is still in its early stages. Challenges such as low efficiency and difficulties in delivering CRISPR to bacterial cells remain. This review provides an overview of the CRISPR-Cas system, highlights recent advancements in CRISPR-Cas-based antimicrobials and delivery strategies for combating AMR. The review also discusses potential challenges for the future development of CRISPR-Cas-based antimicrobials. Addressing these challenges would enable CRISPR therapies to become a practical solution for treating AMR infections in the future.

RevDate: 2025-06-01
CmpDate: 2025-05-29

Bachler A, Padovan A, Anderson CJ, et al (2025)

Disruption of HaVipR1 confers Vip3Aa resistance in the moth crop pest Helicoverpa armigera.

PLoS biology, 23(5):e3003165.

The global reliance on Bacillus thuringiensis (Bt) proteins for controlling lepidopteran pests in cotton, corn, and soybean crops underscores the critical need to understand resistance mechanisms. Vip3Aa, one of the most widely deployed and currently effective Bt proteins in genetically modified crops, plays a pivotal role in pest management. This study investigates the molecular basis of Vip3Aa resistance in Australian Helicoverpa armigera through genetic crosses, and integrated genomic and transcriptomic analyses. We identified a previously uncharacterized gene, LOC110373801 (designated HaVipR1), as potentially important in Vip3Aa resistance in two field-derived resistant lines. Functional validation using CRISPR/Cas9 knockout in susceptible lines confirmed the gene's role in conferring high-level resistance to Vip3Aa. Despite extensive laboratory selection of Vip3Aa-resistant colonies in Lepidoptera, the biochemical mechanisms underlying resistance have remained elusive. Our research identifies HaVipR1 as a potential contributor to resistance, adding to our understanding of how insects may develop resistance to this important Bt protein. The identification of HaVipR1 contributes to our understanding of potential resistance mechanisms and may inform future resistance management strategies. Future work should explore the biochemical pathways influenced by HaVipR1 and assess its interactions with other resistance mechanisms. The approach utilized here underscores the value of field-derived resistant lines for understanding resistance in agricultural pests and highlights the need for targeted approaches to manage resistance sustainably.

RevDate: 2025-06-01
CmpDate: 2025-05-29

Ukita Y, Suzuki R, Miyoshi K, et al (2025)

Generation of Odorant Receptor-QF2 Knock-In Drivers for Improved Analysis of Olfactory Circuits in Drosophila.

Genes to cells : devoted to molecular & cellular mechanisms, 30(4):e70028.

Drosophila melanogaster has provided numerous insights into the olfactory system, primarily relying on a series of transgenic Gal4 drivers. The combined use of Gal4/UAS and a second binary expression system, such as the QF/QUAS system, provides the opportunity to manipulate the two distinct cell populations, thereby accelerating the elucidation of the olfactory neural mechanisms. However, resources apart from the Gal4/UAS system have been poorly developed. In this study, we generated a series of odorant receptor (Or)-QF2 knock-in driver (Or-QF2[KI]) lines for 23 Ors using the CRISPR/Cas9 knock-in method. In these lines, the QF2 protein is cotranslated with each Or product. The expression pattern of the Or-QF2[KI] drivers mostly corresponded to that of the Or-Gal4 drivers. In addition, the Or42a-QF2[KI] driver identified the additional expression pattern of Or42a, which is consistent with the data of single-nucleus RNA sequencing and is attributed to the Or-QF2[KI] drivers' ability to reflect the endogenous expression of the Or genes. Thus, these Or-QF2[KI] drivers can be used as valuable genetic tools for olfactory research in Drosophila.

RevDate: 2025-05-31

Shao Q, Ndzie Noah ML, Golubnitschaja O, et al (2025)

Mitochondrial medicine: "from bench to bedside" 3PM-guided concept.

The EPMA journal, 16(2):239-264.

Mitochondria are the primary sites for aerobic respiration and play a vital role in maintaining physiologic function at the cellular and organismal levels. Physiologic mitochondrial homeostasis, functions, health, and any kind of mitochondrial impairments are associated with systemic effects that are linked to the human health and pathologies. Contextually, mitochondria are acting as a natural vital biosensor in humans controlling status of physical and mental health in a holistic manner. So far, no any disorder is known as happening to humans independently from a compromised mitochondrial health as the cause (primary mitochondrial dysfunction) or a target of collateral damage (secondary mitochondrial injury). This certainty makes mitochondrial medicine be the superior instrument to reach highly ambitious objectives of predictive, preventive, and personalized medicine (PPPM/3PM). 3PM effectively implements the paradigm change from the economically ineffective reactive medical services to a predictive approach, targeted prevention and treatments tailored to individualized patient profiles in primary (protection against health-to-disease transition) and secondary (protection against disease progression) healthcare. Mitochondrial DNA (mtDNA) properties differ significantly from those of nuclear DNA (nDNA). For example, mtDNA as the cell-free DNA molecule is much more stable compared to nDNA, which makes mtDNA be an attractive diagnostic target circulating in human body fluids such as blood and tear fluid. Further, genetic variations in mtDNA contribute to substantial individual differences in disease susceptibility and treatment response. To this end, the current gene editing technologies, such as clustered regularly interspaced short palindromic repeats (CRISPR)/Cas, are still immature in mtDNA modification, and cannot be effectively applied in clinical practice posing a challenge for mtDNA-based therapies. In contrast, comprehensive multiomics technologies offer new insights into mitochondrial homeostasis, health, and functions, which enables to develop more effective multi-level diagnostics and targeted treatment strategies. This review article highlights health- and disease-relevant mitochondrial particularities and assesses involvement of mitochondrial medicine into implementing the 3PM objectives. By discussing the interrelationship between 3PM and mitochondrial medicine, we aim to provide a foundation for advancing early and predictive diagnostics, cost-effective targeted prevention in primary and secondary care, and exemplify personalized treatments creating proof-of-concept approaches for 3PM-guided clinical applications.

RevDate: 2025-05-31
CmpDate: 2025-05-29

Li C, Zha H, Jiao Z, et al (2025)

Genetic engineering of E. coli K-12 for heterologous carbohydrate antigen production.

Microbial cell factories, 24(1):126.

BACKGROUND: Carbohydrate-based vaccines have made a remarkable impact on public health over the past three decades. Efficient production of carbohydrate antigens is a crucial prerequisite for the development of such vaccines. The enzymes involved in the synthesis of bacterial surface carbohydrate antigens are usually encoded by large, uninterrupted gene clusters. Non-pathogenic E. coli glycoengineering starts with the genetic manipulation of these clusters. Heterologous gene cluster recombination through an expression plasmid has several drawbacks, including continuous antibiotic selection pressure, genetic instability, and metabolic burdens. In contrast, chromosome-level gene cluster expression can minimize the metabolic effects on the host and reduce industrial costs.

RESULTS: In this study, we employed the suicide vector-mediated allelic exchange method to directly replace the native polysaccharide gene clusters in E. coli with heterologous ones. Unlike previously strategies, this method does not rely on I-SceI endonuclease or CRISPR/Cas system to release the linearized DNA insert and λ-red recombinase to promote its homologous recombination. Meanwhile, the vectors could be conveniently constructed by assembling multiple large DNA fragments in order in vitro. The scarless chromosomal insertions were confirmed by whole-genome sequencing and the polysaccharide phenotypes of all glycoengineered E. coli mutants were evaluated through growth curves, silver staining, western blot, and flow cytometry. The data indicated that there was no obvious metabolic burden associated with the insertion of large gene clusters into the E. coli W3110 O-antigen locus, and the glycoengineered E. coli can produce LPS with a recovery rate around 1% of the bacterial dry weight. Moreover, the immunogenicity of the heterologously expressed carbohydrate antigens was analyzed by mice immunization experiments. The ELISA data demonstrated the successful induction of anti-polysaccharide IgM or IgG antibodies.

CONCLUSIONS: We have provided a convenient and reliable genomic glycoengineering method to produce efficacious, durable, and cost-effective carbohydrate antigens in non-pathogenic E. coli. Non-pathogenic E. coli glycoengineering has great potential for the highly efficient synthesis of heterologous polysaccharides and can serve as a versatile platform to produce next-generation biomedical agents, including glycoconjugate vaccines, glycoengineered minicells or outer membrane vesicles (OMVs), polysaccharide-based diagnostic reagents, and more.

RevDate: 2025-06-02
CmpDate: 2025-06-02

Vanhooydonck M, De Neef E, De Saffel H, et al (2025)

Prime editing outperforms homology-directed repair as a tool for CRISPR-mediated variant knock-in in zebrafish.

Lab animal, 54(6):165-172.

Zebrafish serve as a valuable model organism for studying human genetic diseases. While generating knockout lines is relatively straightforward, introducing precise disease-specific genetic variants by knock-in (KI) remains challenging. KI lines, however, enable more accurate studies of molecular and physiological consequences of genetic diseases. Their generation is often hampered by low editing efficiency (EE) and potential off-target effects. Here, we optimized conventional CRISPR-Cas9-mediated homology-directed repair (HDR) strategies for precise KI of genetic variants in zebrafish and compared their efficacy with prime editing, a recently developed technique that is not yet commonly used. Using next-generation sequencing, we determined KI EE by HDR for six unique base-pair substitutions in three different zebrafish genes. We assessed the effect of (1) varying Cas9 amounts, (2) HDR templates with chemical modifications to improve integration efficiency, (3) different microinjection procedures and (4) introduction of additional synonymous guide-blocking variants in the HDR template. Increasing Cas9 amounts augmented KI EE, with optimal injected amounts of Cas9 between 200 pg and 800 pg. The use of Alt-R HDR templates further increased KI EE, while guide-blocking modifications did not. Injecting components directly into the cell was not superior to injections into the yolk. Prime editing, however, increased EE up to fourfold and expanded the F0 founder pool for four targets compared with conventional HDR editing, with fewer off-target effects. Therefore, prime editing is a very promising methodology for improving the creation of precise genomic edits in zebrafish, facilitating the modeling of human diseases.

RevDate: 2025-06-03
CmpDate: 2025-06-03

Sun J, Bai J, Huang Y, et al (2025)

A CRISPR/Cas12a-based DNAzyme visualization platform for rapid discrimination of Streptococcus suis serotype 2 versus 1/2 and serotype 1 versus 14.

Talanta, 294:128241.

Streptococcus suis is a major swine pathogen with serotypes 2 and 14 posing zoonotic risks. However, distinguishing serotypes 1/2 from 2 or 1 from 14 remains challenging due to high similarity in their capsule polysaccharide (CPS) loci. Here, we developed a rapid, equipment-free discriminating platform targeting a single nucleotide polymorphism (SNP) at position 483 of the cpsK gene (G in serotypes 2/14 vs. T/C in 1/2/1). The method integrates recombinase polymerase amplification (RPA) with CRISPR/Cas12a and a G-quadruplex-hemin DNAzyme visualization system. RPA enables isothermal amplification, while CRISPR/Cas12a ensures single-nucleotide specificity by cleaving target DNA. Subsequent DNAzyme catalysis converts colorimetric substrates, enabling naked-eye differentiation via distinct color changes (blue for serotypes 1/2/1 vs. colorless for 2/14). This approach achieved a sensitivity of 10[1]-10[2] copies per reaction and demonstrated 100 % specificity across 29 S. suis serotypes and related strains. Compared to PCR-based or sequencing methods, our platform eliminates reliance on thermocyclers or fluorescence detectors, reducing costs and operational complexity. The entire workflow, completed within 70 min, offers a practical solution for point-of-care testing in resource-limited settings. By enabling rapid, accurate discrimination, this tool will become a complementary tool for resolving ambiguous serotypes and enhances outbreak management in swine populations and mitigates zoonotic transmission.

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ESP Quick Facts

ESP Origins

In the early 1990's, Robert Robbins was a faculty member at Johns Hopkins, where he directed the informatics core of GDB — the human gene-mapping database of the international human genome project. To share papers with colleagues around the world, he set up a small paper-sharing section on his personal web page. This small project evolved into The Electronic Scholarly Publishing Project.

ESP Support

In 1995, Robbins became the VP/IT of the Fred Hutchinson Cancer Research Center in Seattle, WA. Soon after arriving in Seattle, Robbins secured funding, through the ELSI component of the US Human Genome Project, to create the original ESP.ORG web site, with the formal goal of providing free, world-wide access to the literature of classical genetics.

ESP Rationale

Although the methods of molecular biology can seem almost magical to the uninitiated, the original techniques of classical genetics are readily appreciated by one and all: cross individuals that differ in some inherited trait, collect all of the progeny, score their attributes, and propose mechanisms to explain the patterns of inheritance observed.

ESP Goal

In reading the early works of classical genetics, one is drawn, almost inexorably, into ever more complex models, until molecular explanations begin to seem both necessary and natural. At that point, the tools for understanding genome research are at hand. Assisting readers reach this point was the original goal of The Electronic Scholarly Publishing Project.

ESP Usage

Usage of the site grew rapidly and has remained high. Faculty began to use the site for their assigned readings. Other on-line publishers, ranging from The New York Times to Nature referenced ESP materials in their own publications. Nobel laureates (e.g., Joshua Lederberg) regularly used the site and even wrote to suggest changes and improvements.

ESP Content

When the site began, no journals were making their early content available in digital format. As a result, ESP was obliged to digitize classic literature before it could be made available. For many important papers — such as Mendel's original paper or the first genetic map — ESP had to produce entirely new typeset versions of the works, if they were to be available in a high-quality format.

ESP Help

Early support from the DOE component of the Human Genome Project was critically important for getting the ESP project on a firm foundation. Since that funding ended (nearly 20 years ago), the project has been operated as a purely volunteer effort. Anyone wishing to assist in these efforts should send an email to Robbins.

ESP Plans

With the development of methods for adding typeset side notes to PDF files, the ESP project now plans to add annotated versions of some classical papers to its holdings. We also plan to add new reference and pedagogical material. We have already started providing regularly updated, comprehensive bibliographies to the ESP.ORG site.

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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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Papers in Classical Genetics

The ESP began as an effort to share a handful of key papers from the early days of classical genetics. Now the collection has grown to include hundreds of papers, in full-text format.

Digital Books

Along with papers on classical genetics, ESP offers a collection of full-text digital books, including many works by Darwin and even a collection of poetry — Chicago Poems by Carl Sandburg.

Timelines

ESP now offers a large collection of user-selected side-by-side timelines (e.g., all science vs. all other categories, or arts and culture vs. world history), designed to provide a comparative context for appreciating world events.

Biographies

Biographical information about many key scientists (e.g., Walter Sutton).

Selected Bibliographies

Bibliographies on several topics of potential interest to the ESP community are automatically maintained and generated on the ESP site.

ESP Picks from Around the Web (updated 28 JUL 2024 )