Conformationally Restrained Melatonin Analogues: Synthesis, Binding Affinity for the Melatonin Receptor, Evaluation of the Biological Activity, and Molecular Modeling Study
作者:Gilberto Spadoni、Cesarino Balsamini、Giuseppe Diamantini、Barbara Di Giacomo、Giorgio Tarzia、Marco Mor、Pier Vincenzo Plazzi、Silvia Rivara、Valeria Lucini、Romolo Nonno、Marilou Pannacci、Franco Fraschini、Bojidar Michaylov Stankov
DOI:10.1021/jm960651z
日期:1997.6.1
design, synthesis, and biological profile of several indole melatonin analogues with a conformationally restricted C3 amidoethane side chain are presented. Examination of the accessible conformations of the melatonin side chain led us to explore some of its fully or partially restricted analogues, 2-12, the binding affinity values of which were utilized to gain further insight on the melatonin binding
介绍了具有构象受限的C3酰胺乙烷侧链的几种吲哚褪黑激素类似物的设计,合成和生物学特征。褪黑激素侧链可及的构象的检查使我们探索了其全部或部分受限制的类似物2-12,利用其结合亲和力值获得了对褪黑激素结合位点的进一步了解。通过使用DISCO程序进行构象分析和叠加,为褪黑激素和活性化合物设计了两个药效学模型。在这些模型中,褪黑激素侧链可以在吲哚平面之外采用薄纱/反构象。这项研究的另一项贡献是观察到吲哚C2位置周围可能存在的结合点相互作用,如在C 2-取代的类似物6和9,尤其是在更刚性的类似物5中观察到的结合亲和力显着增加所暗示的那样。通过测量对福司柯林刺激的cAMP蓄积的抑制作用来测试新化合物的生物学活性和功效。和GTP伽玛S指数。两项分析均表明,除4和9以外,所有化合物均为完全激动剂,它们的功效略有降低,似乎是部分激动剂。