Generation of Large Fragment Knock-In Mouse Models by Microinjecting into 2-Cell Stage Embryos
Large fragment knock-in mouse models such as reporters and conditional mutant mice are important models for biological research. Here we describe 2-cell (2C)-homologous recombination (HR)-CRISPR, a highly efficient method to generate large fragment knock-in mouse models by CRISPR-based genome engineering. Using this method, knock-in founders can be generated routinely in a time frame of about two months with high germline transmission efficiency. 2C-HR-CRISPR will significantly promote the advancement of basic and translational research using genetic mouse models.
Key wordsCRISPR-Cas9 2-Cell stage Knock-in Homologous recombination
This work was supported by CIHR (FDN-143334) and Genome Canada and Ontario Genomics (OGI-099). The authors wish to thank Dr. Janet Rossant for her guidance and support during the development of 2C-HR-CRISPR and critical discussion and comments.
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