Investigation of the Histamine H3 Receptor Binding Site. Design and Synthesis of Hybrid Agonists with a Lipophilic Side Chain
作者:Makoto Ishikawa、Takashi Watanabe、Toshiaki Kudo、Fumikazu Yokoyama、Miki Yamauchi、Kazuhiko Kato、Nobukazu Kakui、Yasuo Sato
DOI:10.1021/jm100643t
日期:2010.9.9
As a part of our search for novel histamine H3 receptor agonists, we designed and synthesized hybrid compounds in which the lipophilic (4′-alkylphenylthio)ethyl moiety of a novel H3 receptor agonist, 4-(2-(4′-tert-butylphenylthio)ethyl)-1H-imidazole (1), was incorporated into Nα-methylhistamine, immepip, and immethridine derivatives. These hybrid compounds were expected to interact concurrently with
作为我们寻找新的组胺H3受体激动剂的一部分,我们设计并合成了杂化化合物,其中新型H3受体激动剂4-(2-(4'-叔丁基苯硫基)的亲脂性(4'-烷基苯硫基)乙基部分)乙基)-1 ħ -咪唑(1),被编入ñ α -甲基组胺,immepip,和immethridine衍生物。预期这些杂合化合物与H3受体中的组胺结合位点和假定的疏水区同时相互作用。其中,哌啶类和吡啶类衍生物表现出部分激动剂活性,而(S)-4-(1-(1 H-咪唑-4-基)-2-(4-(三氟甲基)苯硫基)乙基)哌啶(36)被确定为有效的H3激动剂。我们进行了计算对接研究,以检查激动剂的结合模式。结果表明,immepip与关键残基Asp114和Glu206的相互作用不同于组胺。36与这些残基的结合模式与immepip相似,并且36的亲脂性尾巴与受体的跨膜螺旋6中的疏水区具有额外的相互作用。这些结果表明36是研究受体激动剂相互作用和药物设计的有用工具。