Novel Indolylindazolylmaleimides as Inhibitors of Protein Kinase C-β: Synthesis, Biological Activity, and Cardiovascular Safety
作者:Han-Cheng Zhang、Claudia K. Derian、David F. McComsey、Kimberly B. White、Hong Ye、Leonard R. Hecker、Jian Li、Michael F. Addo、Diane Croll、Annette J. Eckardt、Charles E. Smith、Quan Li、Wai-Man Cheung、Bruce R. Conway、Stuart Emanuel、Keith T. Demarest、Patricia Andrade-Gordon、Bruce P. Damiano、Bruce E. Maryanoff
DOI:10.1021/jm049478u
日期:2005.3.1
Novel indolylindazolylmaleimides were synthesized and examined for kinase inhibition. We identified low-nanomolar inhibitors of PKC-beta with good to excellent selectivity vs other PKC isozymes and GSK-3 beta. In a cell-based functional assay, 8f and 8i effectively blocked IL-8 release induced by PKC-beta II (IC50 = 20-25 nM). In cardiovascular safety assessment, representative lead compounds bound to the hERG channel with high affinity, potently inhibited ion current in a patch-clamp experiment, and caused a dose-dependent increase of QT(c) in guinea pigs.