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Efficient high-precision transgene knock-in by Recombinases (Redα/β)-enhanced DNA integration-CRISPR-Cas9 (RED-CRISPR)
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Efficient high-precision transgene knock-in by Recombinases (Redα/β)-enhanced DNA integration-CRISPR-Cas9 (RED-CRISPR)
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Journal Article
Efficient high-precision transgene knock-in by Recombinases (Redα/β)-enhanced DNA integration-CRISPR-Cas9 (RED-CRISPR)
2025
Overview
CRISPR-Cas9 tools have revolutionized genetic engineering, yet the efficient precise integration of DNA cargos, particularly for large DNA payloads (>1 kilobase, kb), remains a technical bottleneck. Herein, we develop a Recombinases (Redα/β)-enhanced DNA integration-CRISPR-Cas9 approach, referred to as RED-CRISPR, which offers a versatile yet robust homology-directed repair (HDR) strategy enabling efficient and precise kb-scale DNA insertion across various cell types, including immortalized and primary cells of variable origins. RED-CRISPR significantly enhances HDR efficiencies by 2- to 5-fold change across diverse loci and further elevates HDR rates by 1.5- to 2.5-fold when synergizing with other HDR-enhancing strategies. We achieved up to 45% knock-in efficiency for CAR-T cell manufacturing, and attained 43% knock-in rate for generation of genetically modified mice using an 8-kb DNA cargo. Through a head-to-head comparison, RED-CRISPR profoundly mitigates off-target mutational burden and chromosomal translocations. We envision RED-CRISPR as a powerful genome-editing tool with broad biomedical and therapeutic applications.
Insertion of a long DNA sequence into the host genome is challenging in mammalian cells. Here, the authors develop a recombinase (Redα/β)-enhanced DNA integration approach, which enables efficient and precise kilobase-scale DNA insertion in both primary cells and mouse embryos.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
