Discovery of 2-(Imidazo[1,2-<i>b</i>]pyridazin-2-yl)acetic Acid as a New Class of Ligands Selective for the γ-Hydroxybutyric Acid (GHB) High-Affinity Binding Sites
作者:Jacob Krall、Francesco Bavo、Christina B. Falk-Petersen、Claus H. Jensen、Julie O. Nielsen、Yongsong Tian、Valeria Anglani、Kenneth T. Kongstad、Louise Piilgaard、Birgitte Nielsen、David E. Gloriam、Jan Kehler、Anders A. Jensen、Kasper Harpsøe、Petrine Wellendorph、Bente Frølund
DOI:10.1021/acs.jmedchem.9b00131
日期:2019.3.14
Gabazine, a γ-aminobutyric acid type A (GABAA) receptor antagonist, has previously been reported to inhibit the binding of [3H]NCS-382, a representative ligand of the high-affinity binding site for the neuroactive substance γ-hydroxybutyric acid (GHB). We herein report a study on the structural determinants of gabazine for binding to (i) the orthosteric binding site of the GABAA receptor and (ii) the
以前曾报道过一种新的加巴嗪(一种γ-氨基丁酸(GABAA)受体拮抗剂)抑制[3H] NCS-382的结合,这是神经活性物质γ-羟基丁酸的高亲和力结合位点的代表性配体( GHB)。我们在本文中报告了关于丙巴嗪与(i)GABAA受体的正构结合位点和(ii)高亲和力GHB结合位点结合的结构决定簇的研究。这项研究扩大了用于高亲和力GHB结合位点的可用配体的结构多样性,确定了2-(咪唑并[1,2-b]哒嗪-2-基)乙酸是一种新型的配体骨架,可产生相对较高的类似物[3H] NCS-382对[3H] muscimol结合位点的亲和力(Ki 0.19-2.19μM)和> 50倍的选择性。这些结果表明,加巴嗪与高亲和力GHB和正构GABAA受体结合位点的相互作用不同,并且可以生成不同的类似物以在它们之间进行选择。为了促进进一步的体内研究,鉴定了有希望的前药候选物用于脑部递送。