Indole based peptidomimetics as anti-inflammatory and anti-hyperalgesic agents: Dual inhibition of 5-LOX and COX-2 enzymes
作者:Palwinder Singh、Parteek Prasher、Parvirti Dhillon、Rajbir Bhatti
DOI:10.1016/j.ejmech.2015.04.044
日期:2015.6
The indoles bearing a tosyl group at N-1 and a dipeptide substituent at C-3 were screened for anti-inflammatory and anti-hyperalgesic activities. Some of the compounds made significant reduction in the dextran induced swelling and capsaicin induced pain in the albino mice. About 95% reversal in capsaicin induced pain occurred in the presence of 5 mg kg(-1) of compound 7b, 7d and 7h while diclofenac showed 90% reversal when its 10 mg kg(-1) dose was used. In order to examine the mode of action of these compounds; COX-1, COX-2 and 5-LOX enzyme immunoassays were performed. The IC50 of compound 7b for COX-2 and 5-LOX were in the nM range: 5-LOX, IC50 = 2.0 nM; COX-2, IC50 = 6.3 nM, selectivity for COX-2 over COX-1 was 351. The interactions of the compounds with COX-2 and 5-LOX were supported by the physical parameters including K-i, K-a and Delta G. The most potent compounds 7b, 7d and 7h showed no toxicity to the animals and were identified as the promising leads for anti-inflammatory drugs. (C) 2015 Elsevier Masson SAS. All rights reserved.