The study presents QuadPE, a novel prime editing platform designed for the efficient and precise insertion of large DNA fragments into the genome. Unlike traditional methods that rely on double-stranded breaks or complex integrases, this system uses four strategically coordinated pegRNAs to guide donor DNA into specific genomic loci. Researchers demonstrated that QuadPE can integrate payloads ranging from 1.6 to 26 kilobases with significantly higher success rates than existing recombinase or transposase-mediated technologies. The platform proved effective across various cell types, achieving robust results in both dividing cells and non-dividing primary cells, such as human T cells and neurons. Furthermore, QuadPE maintains high genomic integrity by minimizing off-target activity and unintended deletions during the insertion process. These findings establish QuadPE as a powerful, one-step tool for large-scale genetic manipulation and potential therapeutic applications.

References:

• Shi Y, Ding Z, Wu Y, et al. Quadruple pegRNA enables programmable and efficient large genomic insertion[J]. Nature, 2026: 1-10.