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- W4380877247 abstract "Abstract Objective Recessive dystrophic epidermolysis bullosa (RDEB) is a genetic skin fragility and ultimately lethal blistering disease caused by mutations in the COL7A1 gene which is responsible for coding type VII collagen. Investigating the pathological mechanisms and novel candidate therapies for RDEB could be fostered by new cellular models. Here, we developed multiple immortalized COL7A1 -deficient keratinocyte cell lines using CRISPR/Cas9 technology as RDEB cellular model. Materials and Methods In this experimental study, we used transient transfection to express COL7A1 -targeting gRNA and Cas9 in HEK001 immortalized keratinocyte cell line followed by enrichment with fluorescent-activated cell sorting (FACS) via GFP expressing cells (GFP + HEK001). Homogenous single-cell clones were then isolated, genotyped, and evaluated for type VII collagen expression. We performed a scratch assay to confirm the functional effect of COL7A1 knockout. Results We achieved 46.1% (p < 0.001) efficiency of indel induction in the enriched transfected cell population. Except for 4% of single nucleotide insertions, the remaining indels were deletions of different sizes. Out of nine single clones expanded, two homozygous and two heterozygous COL7A1 -deficient cell lines were obtained with defined mutation sequences. No off-target effect was detected in the knockout cell lines. Immunostaining and western blot analysis showed the lack of type VII collagen (COL7A1) protein expression in these cell lines. We also showed that COL7A1 -deficient cells had higher motility compared with their wild-type counterparts. Conclusion We reported the first isogenic immortalized COL7A1 -deficient keratinocyte lines that provide a useful cell culture model to investigate aspects of RDEB biology and potential therapeutic options." @default.
- W4380877247 created "2023-06-17" @default.
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- W4380877247 date "2023-06-16" @default.
- W4380877247 modified "2023-09-27" @default.
- W4380877247 title "CRISPR/Cas9-mediated Generation of<i>COL7A1</i>-deficient Keratinocyte Model of Recessive Dystrophic Epidermolysis Bullosa" @default.
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- W4380877247 doi "https://doi.org/10.1101/2023.06.15.545036" @default.
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