High-yield genome engineering in primary cells using a hybrid ssDNA repair template and small-molecule cocktails.

High-yield genome engineering in primary cells using a hybrid ssDNA repair template and small-molecule cocktails.
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DOI:
10.1038/s41587-022-01418-8
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发表时间:
2023-04
影响因子:
46.9
通讯作者:
Marson, Alexander
Marson, Alexander
中科院分区:
工程技术1区
文献类型:
--
作者:
Shy, Brian R.;Vykunta, Vivasvan S.;Ha, Alvin;Talbot, Alexis;Roth, Theodore L.;Nguyen, David N.;Pfeifer, Wolfgang G.;Chen, Yan Yi;Blaeschke, Franziska;Shifrut, Eric;Vedova, Shane;Mamedov, Murad R.;Chung, Jing-Yi Jing;Li, Hong;Yu, Ruby;Wu, David;Wolf, Jeffrey;Martin, Thomas G.;Castro, Carlos E.;Ye, Lumeng;Esensten, Jonathan H.;Eyquem, Justin;Marson, Alexander

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Enhancing CRISPR-mediated site-specific transgene insertion efficiency by homology-directed repair (HDR) using high concentrations of double-stranded DNA (dsDNA) with Cas9 target sequences (CTSs) can be toxic to primary cells. Here, we develop single-stranded DNA (ssDNA) HDR templates (HDRTs) incorporating CTSs with reduced toxicity that boost knock-in efficiency and yield by an average of around two- to threefold relative to dsDNA CTSs. Using small-molecule combinations that enhance HDR, we could further increase knock-in efficiencies by an additional roughly two- to threefold on average. Our method works across a variety of target loci, knock-in constructs and primary human cell types, reaching HDR efficiencies of >80–90%. We demonstrate application of this approach for both pathogenic gene variant modeling and gene-replacement strategies for IL2RA and CTLA4 mutations associated with Mendelian disorders. Finally, we develop a good manufacturing practice (GMP)-compatible process for nonviral chimeric antigen receptor-T cell manufacturing, with knock-in efficiencies (46–62%) and yields (>1.5 × 109 modified cells) exceeding those of conventional approaches.
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