Abstract
Duchenne Muscular Dystrophy (DMD) is a progressive muscle wasting disorder caused by loss-of-function mutations in the dystrophin gene. Although the search for a definitive cure has failed to date, extensive efforts have been made to introduce effective therapeutic strategies. Gene editing technology is a great revolution in biology, having an immediate application in the generation of research models. DMD muscle cell lines are reliable sources to evaluate and optimize therapeutic strategies, in-depth study of DMD pathology, and screening the effective drugs. However, only a few immortalized muscle cell lines with DMD mutations are available. In addition, obtaining muscle cells from patients also requires an invasive muscle biopsy. Mostly DMD variants are rare, making it challenging to identify a patient with a particular mutation for a muscle biopsy. To overcome these challenges and generate myoblast cultures, we optimized a CRISPR/Cas9 gene editing approach to model the most common DMD mutations that include approximately 28.2% of patients. GAP-PCR and sequencing results show the ability of the CRISPR-Cas9 system to efficient deletion of mentioned exons. We showed producing truncated transcript due to the targeted deletion by RT-PCR and sequencing. Finally, mutation-induced disruption of dystrophin protein expression was confirmed by western blotting. All together, we successfully created four immortalized DMD muscle cell lines and showed the efficacy of the CRISPR-Cas9 system for the generation of immortalized DMD cell models with the targeted deletions.
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Conceptualization, M.M.; methodology, F.A., Y.J and Y.M.; investigation, F.A and Y.J; writing—original draft preparation, F.A.; discussed and commented on the manuscript, A.E, SH.F and Y.Y; editing article, M.M.; visualization, F.A; supervision, M.M.; project administration, A.E.; All authors have read and agreed to the published version of the manuscript.
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Alizadeh, F., Abraghan, Y.J., Farrokhi, S. et al. Production of Duchenne muscular dystrophy cellular model using CRISPR-Cas9 exon deletion strategy. Mol Cell Biochem (2023). https://doi.org/10.1007/s11010-023-04759-3
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DOI: https://doi.org/10.1007/s11010-023-04759-3