A scalable two-step genome editing strategy for generating full-length gene-humanized mice at diverse genomic loci.

ABSTRACT: Full-length gene-humanized mice engineered by completely replacing mouse loci with human counterparts, including untranslated and regulatory regions, provide a robust in vivo platform for human gene function studies. However, reliably humanizing large genomic regions remains challenging due to limited DNA insert sizes, complex protocols, and specialized material requirements. This study introduces a streamlined approach that enables full-length gene humanization through two sequential CRISPR-assisted homologous recombination steps in embryonic stem cells. This method supports targeted knock-in of genomic fragments ( > 200 kbp) and is applicable across multiple mouse strains. Humanized alleles generated using the developed method recapitulate human-like splicing isoforms and organ-specific

SUBMITTER: Taguchi J 

PROVIDER: S-EPMC12804900 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature