Structure–activity studies on the nociceptin/orphanin FQ receptor antagonist 1-benzyl-N-{3-[spiroisobenzofuran-1(3H),4′-piperidin-1-yl]propyl} pyrrolidine-2-carboxamide
作者:Claudio Trapella、Carmela Fischetti、Michela Pela’、Ilaria Lazzari、Remo Guerrini、Girolamo Calo’、Anna Rizzi、Valeria Camarda、David G. Lambert、John McDonald、Domenico Regoli、Severo Salvadori
DOI:10.1016/j.bmc.2009.05.068
日期:2009.7
Twelve derivatives of the nociceptin/orphanin FQ (N/OFQ) receptor (NOP) antagonist 1-benzyl-N-3-[spiroisobenzofuran-1(3H),4'-piperidin-1-yl]propyl} pyrrolidine-2-carboxamide (Comp 24) were synthesised and tested in binding experiments performed on CHOhNOP cell membranes. Among them, a novel interesting NOP receptor antagonist (compound 35) was identified by blending chemical moieties taken from different NOP receptor ligands. In vitro in various assays, Compound 35 consistently behaved as a pure, highly potent (pA(2) in the range 8.0-9.9), competitive and NOP selective antagonist. However compound 35 was found inactive when challenged against N/OFQ in vivo in the mouse tail withdrawal assay. Thus the usefulness of the novel NOP ligand compound 35 is limited to in vitro investigations. (C) 2009 Elsevier Ltd. All rights reserved.