Bioorganic Chemistry p. 100 - 108 (2019)
Update date:2022-09-26
Topics:
Gao, Mingxiang
Nie, Cunbin
Li, Jinyu
Song, Beibei
Cheng, Xinru
Sun, Erying
Yan, Lin
Qian, Hai
Reported herein is the design, synthesis, and pharmacologic evaluation of a class of TRPV1 antagonists constructed on a N1-(isoquinolin-5-yl)-N2-phenylpyrrolidine-1,2-dicarboxamide platform that evolved from a 5-aminoisoquinoline urea lead. Advancing the SAR of this series led to the eventual identification of 3b, comprising a p-Br substituted phenyl. In a TRPV1 functional assay, using cells expressing recombinant human TRPV1 channels, 3b displayed potent antagonism activated by capsaicin (IC50 = 0.084 μM) and protons (IC50 = 0.313 μM). In the preliminary analgesic and body temperature tests, 3b exhibited good efficacy in capsaicin-induced and heat-induced pain models and without hyperthermia side-effect. On the basis of its superior profiles, 3b could be considered as the lead candidate for the further development of antinociceptive drugs.
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