SAR-020106

SAR-020106 is a potent, ATP-competitive, and selective CHK1 inhibitor with an IC50 of 13.3 nmol/L on the isolated human enzyme.SAR-020106 is an ATP-competitive, potent, and selective CHK1 inhibitor with an IC (50) of 13.3 nmol/L on the isolated human enzyme. This compound abrogates an etoposide-induced G (2) arrest with an IC (50) of 55 nmol/L in HT29 cells, and significantly enhances the cell killing of gemcitabine and SN38 by 3.0- to 29-fold in several colon tumor lines in vitro and in a p53-dependent fashion.