Structure–activity relationships of trimethoxybenzyl piperazine N-type calcium channel inhibitors
作者:Hassan Pajouhesh、Zhong-Ping Feng、Lingyun Zhang、Hossein Pajouhesh、Xinpo Jiang、Adam Hendricson、Haiheng Dong、Elizabeth Tringham、Yanbing Ding、Todd W. Vanderah、Frank Porreca、Francesco Belardetti、Gerald W. Zamponi、Lester A. Mitscher、Terrance P. Snutch
DOI:10.1016/j.bmcl.2012.04.054
日期:2012.6
We previously reported the small organic N-type calcium channel blocker NP078585 that while efficacious in animal models for pain, exhibited modest L-type calcium channel selectivity and substantial off-target inhibition against the hERG potassium channel. Structure-activity studies to optimize NP078585 preclinical properties resulted in compound 16, which maintained high potency for N-type calcium channel blockade, and possessed excellent selectivity over the hERG (similar to 120-fold) and L-type (similar to 3600-fold) channels. Compound 16 shows significant anti-hyperalgesic activity in the spinal nerve ligation model of neuropathic pain and is also efficacious in the rat formalin model of inflammatory pain. (C) 2012 Elsevier Ltd. All rights reserved.