Novel selective human melanocortin-3 receptor ligands: Use of the 4-amino-1,2,4,5-tetrahydro-2-benzazepin-3-one (Aba) scaffold
摘要:
In search of new selective antagonists and/or agonists for the human melanocortin receptor subtypes hMC1R to hMC5R to elucidate the specific biological roles of each GPCR, we modified the structures of the superagonist MT-II (Ac-Nle-c[Asp-HiS-D-Phe-Arg-Trp-Lys]-NH2) and the hMC3R/hMC4R antagonist SHU9119 (Ac-Nle-c[Asp-HiS-D-Nal(2 ')-Arg-Trp-Lys]-NH2) by replacing the HiS-D-Phe and HiS-D-Nal(2 ') fragments in MT-II and SHU9119, respectively, with Aba-Xxx (4-amino-1,2,4,5-tetrahydro-2-benzazepin-3-one-Xxx) dipeptidomimetics (Xxx = D-Phe/pCl-D-Phe/D-Nal(2 ')). Employment of the Aba mimetic yielded novel selective high affinity hMC3R and hMC3R/hMC5R antagonists. (C) 2007 Elsevier Ltd. All rights reserved.
Novel selective human melanocortin-3 receptor ligands: Use of the 4-amino-1,2,4,5-tetrahydro-2-benzazepin-3-one (Aba) scaffold
摘要:
In search of new selective antagonists and/or agonists for the human melanocortin receptor subtypes hMC1R to hMC5R to elucidate the specific biological roles of each GPCR, we modified the structures of the superagonist MT-II (Ac-Nle-c[Asp-HiS-D-Phe-Arg-Trp-Lys]-NH2) and the hMC3R/hMC4R antagonist SHU9119 (Ac-Nle-c[Asp-HiS-D-Nal(2 ')-Arg-Trp-Lys]-NH2) by replacing the HiS-D-Phe and HiS-D-Nal(2 ') fragments in MT-II and SHU9119, respectively, with Aba-Xxx (4-amino-1,2,4,5-tetrahydro-2-benzazepin-3-one-Xxx) dipeptidomimetics (Xxx = D-Phe/pCl-D-Phe/D-Nal(2 ')). Employment of the Aba mimetic yielded novel selective high affinity hMC3R and hMC3R/hMC5R antagonists. (C) 2007 Elsevier Ltd. All rights reserved.