Synthesis and structure–activity relationship studies of tyrosine-based antagonists at the human P2X7 receptor
作者:Ga Eun Lee、Bhalchandra V. Joshi、Wangzhong Chen、Lak Shin Jeong、Hyung Ryong Moon、Kenneth A. Jacobson、Yong-Chul Kim
DOI:10.1016/j.bmcl.2007.11.077
日期:2008.1
Analogues of the P2X(7) receptor antagonist KN-62, modified at the piperazine and arylsulfonyl groups, were synthesized and assayed at the human P2X(7) receptor for inhibition of BzATP-induced effects, that is, uptake of a fluorescent dye (ethidium bromide) in stably transfected HEK293 cells and IL-1 beta release in differentiated THP-1 cells. Substitution of the arylsulfonyl, moiety with a nitro group increased antagonistic potency relative to methyl substitution, such that compound 21 was slightly more potent than KN-62. Substitution with D-tyrosine in 36 and sterically bulky tyrosyl 3,5-dimethyl groups in 9 enhanced antagonistic potency. (c) 2007 Elsevier Ltd. All rights reserved.