Exploiting HSD17B11-dependent dialkynylcarbinols cytotoxicity for facile CRISPR/Cas9-based gene inactivation

Abstract

Several approaches have been developed to improve the efficiency of CRISPR/Cas9-based genome editing, including the co-inactivation of a gene whose loss confers resistance to a cytotoxic compound, thereby enabling enrichment of successfully edited cells. Here, we show across multiple cell lines that inactivation of HSD17B11, a non-essential member of the Short-chain Dehydrogenase/Reductase (SDR) superfamily, confers strong resistance (29- to 131-fold) to a Phenyl diAlkynylCarbinol compound (PAC) in both human and mouse cells, without affecting cell viability or proliferation. We demonstrate that co-inactivation of HSD17B11 followed by PAC selection can be used to rapidly identify efficient guide RNAs targeting a gene of interest and to readily isolate clones inactivated for one or multiple genes. Altogether, these results establish a simple and efficient experimental strategy for generating knockout cells by using PAC selection to enrich for successfully edited cells.