2,3-Dihydro-dithiin and -dithiepine-1,1,4,4-tetroxides: small molecule non-peptide antagonists of the human galanin hGAL-1 receptor
作者:Malcolm K Scott、Tina M Ross、Daniel H.S Lee、Hoau-Yan Wang、Richard P Shank、Kenneth D Wild、Coralie B Davis、Jeffrey J Crooke、Alexander C Potocki、Allen B Reitz
DOI:10.1016/s0968-0896(00)00062-6
日期:2000.6
The neuropeptide galanin modulates several physiological functions such as cognition, learning, feeding behavior, and depression, probably via the galanin 1 receptor(GAL-R1). Using an HTS assay based on I-125-human galanin binding to the human galanin-l receptor (hGAL-R1), we discovered a series of 1,4-dithiin and dithiipine-1,1,4,4-tetroxides that exhibited binding affinity IC50's to hGAL-R1 ranging from 190 to 2700 nM. Two of the dithiepin analogues, 7 and 23, behaved pharmacologically as hGAL-R1 antagonists in secondary assays involving adenylate cyclase activity and GTP binding to G-proteins. Analogues 7 and 23 were also active in functional assays involving galanin, reversing the inhibitory effect of galanin on acetylcholine (ACh) release in rat brain hippocampal slices and electrically-stimulated guinea pig ileum twitch. (C) 2000 Elsevier Science Ltd. All rights reserved.