GDC-mTOR inhibitor

Description: IC50 Value: 1.5nM (Ki) GDC-mTOR inhibitor is a potent and selective ATP-competitive inhibitor of mTOR. It's derivative drug, GDC-0349, demonstrates pathway modulation and dose-dependent efficacy in mouse xenograft cancer models. Abstract: Selective inhibitors of mammalian target of rapamycin (mTOR) kinase based upon saturated heterocycles fused to a pyrimidine core were designed and synthesized. Each series produced compounds with Ki < 10 nM for the mTOR kinase and >500-fold selectivity over closely related PI3 kinases. This potency translated into strong pathway inhibition, as measured by phosphorylation of mTOR substrate proteins and antiproliferative activity in cell lines with a constitutively active PI3K pathway. Two compounds exhibiting suitable mouse PK were profiled in in vivo tumor models and were shown to suppress mTORC1 and mTORC2 signaling for over 12 h when dosed orally. Both compounds were additionally shown to suppress tumor growth in vivo in a PC3 prostate cancer model over a 14 day study.