Mutated KRAS promotes the activation of MAPK pathway and progression colorectal cancer (CRC) cells. Aberrant PI3K strongly attenuates efficacy suppression in KRAS-mutated CRC. The development a novel strategy targeting dual is therefore highly essential for therapy In this study, quadruple-depleting system KRAS, MEK1, PIK3CA, MTOR genes based on CRISPR/SaCas9 was developed. Adenovirus serotype ...