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Page 33 of 1000-
Response to "Unexpected mutations after CRISPR-Cas9 editing in vivo".
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Recent advances in genetic engineering tools based on synthetic biology.
Genome-scale engineering is a crucial methodology to rationally regulate microbiological system operations, leading to expected biological behaviors or enhanced bioproduct yields. Over the past decade, innovative genome modification technologies have been developed for effectively regulating and manipulating genes at the genome level. Here, we discuss the current genome-scale engineering technologies used for microbial engineering. Recently developed strategies, such as clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9, multiplex automated genome engineering (MAGE), promoter engineering, CRISPR-based regulations, and synthetic small regulatory RNA (sRNA)-based knockdown, are considered as powerful tools for genome-scale engineering in microbiological systems. MAGE, which modifies specific nucleotides of the genome sequence, is utilized as a genome-editing tool. Contrastingly, synthetic sRNA, CRISPRi, and CRISPRa are mainly used to regulate gene expression without modifying the genome sequence. This review introduces the recent genome-scale editing and regulating technologies and their applications in metabolic engineering.
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CRISPR/Cas9-mediated genome editing via postnatal administration of AAV vector cures haemophilia B mice.
Haemophilia B, a congenital haemorrhagic disease caused by mutations in coagulation factor IX gene (F9), is considered an appropriate target for genome editing technology. Here, we describe treatment strategies for haemophilia B mice using the clustered regularly interspaced short palindromic repeat (CRISPR)/Cas9 system. Administration of adeno-associated virus (AAV) 8 vector harbouring Staphylococcus aureus Cas9 (SaCas9) and single guide RNA (sgRNA) to wild-type adult mice induced a double-strand break (DSB) at the target site of F9 in hepatocytes, sufficiently developing haemophilia B. Mutation-specific gene editing by simultaneous induction of homology-directed repair (HDR) sufficiently increased FIX levels to correct the disease phenotype. Insertion of F9 cDNA into the intron more efficiently restored haemostasis via both processes of non-homologous end-joining (NHEJ) and HDR following DSB. Notably, these therapies also cured neonate mice with haemophilia, which cannot be achieved with conventional gene therapy with AAV vector. Ongoing haemophilia therapy targeting the antithrombin gene with antisense oligonucleotide could be replaced by SaCas9/sgRNA-expressing AAV8 vector. Our results suggest that CRISPR/Cas9-mediated genome editing using an AAV8 vector provides a flexible approach to induce DSB at target genes in hepatocytes and could be a good strategy for haemophilia gene therapy.
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CRISPR GENOME SURGERY IN THE RETINA IN LIGHT OF OFF-TARGETING.
PURPOSE: Recent concerns regarding the clinical utilization of clustered regularly interspaced short palindromic repeats (CRISPR) involve uncertainties about the potential detrimental effects that many arise due to unintended genetic changes, as in off-target mutagenesis, during CRISPR genome surgery. This review gives an overview of off-targeting detection methods and CRISPR's place in the clinical setting, specifically in the field of ophthalmology. RESULTS: As CRISPR utilization in the laboratory setting has increased, knowledge regarding CRISPR mechanisms including its off-target effects has also increased. Although a perfect method for achieving 100% specificity is yet to be determined, the past few years have seen many developments in off-targeting detection and in increasing efficacy of CRISPR tools. CONCLUSION: The CRISPR system has high potential to be an invaluable therapeutic tool as it has the ability to modify and repair pathogenic retinal lesions. Although it is not yet a perfect system, with further efforts to improve its specificity and efficacy along with careful screening of off-target mutations, CRISPR-mediated genome surgery potential can become maximized and applied to patients.
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Circular CRISPR Edits Human Pluripotent Stem Cells for Disease Modeling.
The CRISPR system has been widely used for human pluripotent stem cell (hPSC) disease modeling. Circular RNA can effectively reduce RNA immunogenicity and improve RNA stability, thus contributing to in vivo DNA editing. In this study, we briefly describe the process of circularizing guide RNA and CRISPR base editing elements and using them to establish stem cell disease models. Our work provides step-by-step guidance for constructing gene point editing cell lines, offering a reliable, low-immunogenic alternative for disease modeling and therapeutic research.
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New gene editing technique CRISPR-Cas9 raises important ethical questions, says advisory body.
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Five big mysteries about CRISPR's origins.
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Broad defeats Berkeley CRISPR patent.
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CRISPR meets AlphaFold: guiding SWEET10-enhanced oil production.
Enhancing seed oil content significantly benefits both human welfare and environmental sustainability. Clustered regularly interspaced short palindromic repeats/CRISPR-associated protein (CRISPR/Cas) and artificial intelligence (AI) are transformative tools for crop trait improvement. A recent study by Wang and colleagues reported that AlphaFold-guided CRISPR genome editing of SWEET10 boosts oil contents, highlighting a breakthrough in precision crop engineering.
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Harnessing CRISPR/Cas 9 System for manipulation of DNA virus genome.
The recent development of the Clustered Regularly Interspaced Palindromic Repeat (CRISPR)/CRISPR-associated protein 9 (Cas9) system, a genome editing system, has many potential applications in virology. The possibility of introducing site specific breaks has provided new possibilities to precisely manipulate viral genomics. Here, we provide diagrams to summarize the steps involved in the process. We also systematically review recent applications of the CRISPR/Cas9 system for manipulation of DNA virus genomics and discuss the therapeutic potential of the system to treat viral diseases.
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