1-(2-Alkanamidoethyl)-6-methoxyindole Derivatives: A New Class of Potent Indole Melatonin Analogues
作者:Giorgio Tarzia、Giuseppe Diamantini、Barbara Di Giacomo、Gilberto Spadoni、Daniele Esposti、Romolo Nonno、Valeria Lucini、Marilou Pannacci、Franco Fraschini、Bojidar Michaylov Stankov
DOI:10.1021/jm960653j
日期:1997.6.1
A new series of indole melatonin analogues, bearing the amido ethyl side chain attached at the N-1 position of the indole nucleus, were synthesized and tested for their affinity for the melatonin receptor isolated from quail optic tecta in a series of in vitro ligand-binding experiments using 2-[125I]iodomelatonin as the labeled ligand. The biological activity was evaluated using two models: effects
合成了一系列新的吲哚褪黑素类似物,它们在吲哚核的N-1位带有酰胺乙基侧链,并在一系列体外配体中测试了它们与从鹌鹑视神经皮层分离的褪黑激素受体的亲和力, 2- [125I]碘降钙素作为标记的配体的结合实验。使用两种模型评估生物活性:对鹌鹑视神经外植体中福司可林刺激的cAMP积累的影响,以及在不存在或存在GTPγS的条件下进行竞争实验得出的GTPγS指数的评估。通过将甲氧基和乙基酰胺基侧链从褪黑激素的C-5和C-3位置转移到吲哚核的C-6和N-1位置而获得的-n具有与褪黑激素本身相似的亲和力,以及完整的激动剂活动。通过引入Br,苯基或COOCH3(2b-d)优化C-2取代基可显着提高亲和力(在皮摩尔范围内)并改善激动剂的生物活性。缺少甲氧基并带有N-脂环族基团(2h-j)的化合物起部分激动剂或拮抗剂的作用。