Abstract
The CRISPR system, as an effective genome editing technology, has been extensively utilized for the construction of disease models in human pluripotent stem cells. Establishment of a gene mutant or knockout stem cell line typically relies on Cas nuclease-generated double-stranded DNA breaks and exogenous templates, which can produce uncontrollable editing byproducts and toxicity. The recently developed adenine base editors (ABE) have greatly facilitated related research by introducing A/T > G/C mutations in the coding regions or splitting sites (AG-GT) of genes, enabling mutant gene knock-in or knock-out without introducing DNA breaks. In this study, we edit the AG bases in exons anterior to achieve gene knockout via the ABE8e-SpRY, which recognizes most expanded protospacer adjacent motif to target the genome. Except for gene-knockout, ABE8e-SpRY can also efficiently establish disease-related A/T-to-G/C variation cell lines by targeting coding sequences. The method we generated is simple and time-saving, and it only takes two weeks to obtain the desired cell line. This protocol provides operating instructions step-by-step for constructing knockout and point mutation cell lines.
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We gratefully acknowledge funding support from the National Natural Science Foundation of China (82070258, 81970205), Shenzhen Fundamental Research Program (ZDSYS20200923172000001), China Postdoctoral Science Foundation (2022M720498).
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MSH and LF designed this study; CY and ZYS performed the majority of cell experiments and data analysis; CY and ZYS provided the manuscript preparation. All authors read and approved the final manuscript.
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Chang, Y., Lan, F., Zhang, Y. et al. Crispr-Based Editing of Human Pluripotent Stem Cells for Disease Modeling. Stem Cell Rev and Rep (2024). https://doi.org/10.1007/s12015-024-10713-7
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DOI: https://doi.org/10.1007/s12015-024-10713-7