Synthesis and binding affinity of novel mono- and bivalent morphinan ligands for κ, μ, and δ opioid receptors
作者:Bin Zhang、Tangzhi Zhang、Anna W. Sromek、Thomas Scrimale、Jean M. Bidlack、John L. Neumeyer
DOI:10.1016/j.bmc.2011.03.052
日期:2011.5
A novel series of homo-and heterodimeric ligands containing kappa/mu agonist and mu agonist/antagonist pharmacophores joined by a 10-carbon ester linker chain were synthesized and evaluated for their in vitro binding affinity at kappa, mu, and delta opioid receptors, and their functional activities were determined at kappa and mu receptors in [S-35] GTP gamma S functional assays. Most of these compounds had high binding affinity at mu and kappa receptors (K-i values less than 1 nM). Compound 15b, which contains butorphan (1) at one end of linking chain and butorphanol (5) at the other end, was the most potent ligand in this series with binding affinity K-i values of 0.089 nM at the mu receptor and 0.073 nM at the kappa receptor. All of the morphinan-derived ligands were found to be partial kappa and mu agonists; ATPM-derived ligands 12 and 11 were found to be full kappa agonists and partial mu agonists. (C) 2011 Elsevier Ltd. All rights reserved.