Gain-of-function enhancers optimize CAR-NK cell-based anti-cancer immunotherapy

Schematic overview of the two-stage screening approach used to identify NK cell fitness genes. (A) CRISPRa mechanism, showing dCas9-VP64-mediated upregulation of target genes. (B) Whole-genome CRISPRa screening in HER2-CAR-NK92 cells transduced with a CRISPR sgRNA library and transferred into mice bearing HT29 tumours, followed by tumour collection and next-generation sequencing (NGS). (C) Barcoded ORF mini-screen in primary peripheral blood NK (PBNK) cells transduced with HER2-CAR and an ORF library, transferred into HT29 tumour-bearing mice, with subsequent tumour collection and NGS analysis.