NIH R01 · 2025
Analysis of homolog-based CRISPR editing in somatic cells
Recently developed CRISPR-based systems permit precise genome editing by inducing targeted DNA breaks at specific sites in the genome. Cellular DNA repair machinery can restore genome integrity by copying information from the intact homologous chromosome at the cleavage site via homology directed repair (HDR). While precise HDR-mediated DNA repair is the predominant pathway active during meiosis, the competing and potentially mutagenic non-homologous end-joining pathway (NHEJ) is typically thought to prevail in somatic cells. One reason for this bias is that the NHEJ pathway is active throughout somatic cell cycles, while HDR is primarily restricted to post-replicative S and G2 phases.…
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