Structure-Based Design of Potent and Selective 3-Phosphoinositide-Dependent Kinase-1 (PDK1) Inhibitors
作者:Jesús R. Medina、Christopher J. Becker、Charles W. Blackledge、Celine Duquenne、Yanhong Feng、Seth W. Grant、Dirk Heerding、William H. Li、William H. Miller、Stuart P. Romeril、Daryl Scherzer、Arthur Shu、Mark A. Bobko、Antony R. Chadderton、Melissa Dumble、Christine M. Gardiner、Seth Gilbert、Qi Liu、Sridhar K. Rabindran、Valery Sudakin、Hong Xiang、Pat G. Brady、Nino Campobasso、Paris Ward、Jeffrey M. Axten
DOI:10.1021/jm101527u
日期:2011.3.24
Phosphoinositide-dependent protein kinase-1 (PDK1) is a master regulator of the AGC family of kinases and an integral component of the PI3K/AKT/mTOR pathway. As this pathway is among the most commonly deregulated across all cancers, a selective inhibitor of PDKI might have utility as an anticancer agent. Herein we describe our lead optimization of compound 1 toward highly potent and selective PDKI inhibitors via a structure-based design strategy. The most potent and selective inhibitors demonstrated submicromolar activity as measured by inhibition of phosphorylation of PDK1 substrates as well as antiproliferative activity against a subset of AML cell lines. In addition, reduction of phosphorylation of PDK1 substrates was demonstrated in vivo in mice bearing OC1-AML2 xenografts. These observations demonstrate the utility of these molecules as tools to further delineate the biology of PDKI and the potential pharmacological uses of a PDK1 inhibitor.