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• W3152607310 abstract "Mutations in the DMD gene encoding dystrophin-a critical structural element in muscle cells-cause Duchenne muscular dystrophy (DMD), which is the most common fatal genetic disease. Clustered regularly interspaced short palindromic repeat (CRISPR)-mediated gene editing is a promising strategy for permanently curing DMD.In this study, we developed a novel strategy for reframing DMD mutations via CRISPR-mediated large-scale excision of exons 46-54. We compared this approach with other DMD rescue strategies by using DMD patient-derived primary muscle-derived stem cells (DMD-MDSCs). Furthermore, a patient-derived xenograft (PDX) DMD mouse model was established by transplanting DMD-MDSCs into immunodeficient mice. CRISPR gene editing components were intramuscularly delivered into the mouse model by adeno-associated virus vectors.Results demonstrated that the large-scale excision of mutant DMD exons showed high efficiency in restoring dystrophin protein expression. We also confirmed that CRISPR from Prevotella and Francisella 1(Cas12a)-mediated genome editing could correct DMD mutation with the same efficiency as CRISPR-associated protein 9 (Cas9). In addition, more than 10% human DMD muscle fibers expressed dystrophin in the PDX DMD mouse model after treated by the large-scale excision strategies. The restored dystrophin in vivo was functional as demonstrated by the expression of the dystrophin glycoprotein complex member β-dystroglycan.We demonstrated that the clinically relevant CRISPR/Cas9 could restore dystrophin in human muscle cells in vivo in the PDX DMD mouse model. This study demonstrated an approach for the application of gene therapy to other genetic diseases." @default.
• W3152607310 created "2021-04-26" @default.
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• W3152607310 date "2021-04-12" @default.
• W3152607310 modified "2023-10-14" @default.
• W3152607310 title "In vivo genome editing in mouse restores dystrophin expression in Duchenne muscular dystrophy patient muscle fibers" @default.
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• W3152607310 doi "https://doi.org/10.1186/s13073-021-00876-0" @default.
• W3152607310 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8042958" @default.
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