Novel Potent 5-HT3 Receptor Ligands Based on the Pyrrolidone Structure: Synthesis, Biological Evaluation, and Computational Rationalization of the Ligand–Receptor Interaction Modalities
作者:Andrea Cappelli、Maurizio Anzini、Salvatore Vomero、Laura Mennuni、Francesco Makovec、Edith Doucet、Michel Hamon、M.Cristina Menziani、Pier G. De Benedetti、Gianluca Giorgi、Carla Ghelardini、Simona Collina
DOI:10.1016/s0968-0896(01)00332-7
日期:2002.3
Novel conformationally constrained derivatives of classical 5-HT(3) receptor antagonists were designed and synthesized with the aim of probing the central 5-HT(3) receptor recognition site in a systematic way. The newly-synthesized compounds were tested for their potential ability to inhibit [(3)H]granisetron specific binding to 5-HT(3) receptor in rat cortical membranes. These studies revealed subnanomolar
设计并合成了新型5-HT(3)受体拮抗剂的新型构象受约束的衍生物,旨在以系统的方式探测中央5-HT(3)受体识别位点。测试了新合成的化合物在大鼠皮膜中抑制[(3)H]格兰司琼对5-HT(3)受体的特异性结合的潜在能力。这些研究揭示了一些正在研究的化合物的亚纳摩尔亲和力。发现该系列中最有效的配体是喹核苷衍生物(S)-7i,其显示出与参考配体格拉司琼相当的亲和力。在体外对NG 108-15细胞中的5-HT(3)受体依赖性[(14)C]胍鎓摄取进行了评估,对某些选定化合物的潜在5-HT(3)激动剂/拮抗剂活性进行了评估。在此功能测定中测试的两种托烷衍生物(7a和9a)均表现出拮抗特性,而研究的喹uc啶衍生物[化合物7i,8g和9g的对映体以及化合物(R)-8h]则显示了全部内在功效。因此,这些5-HT(3)受体配体的功能行为似乎受氮杂双环部分和杂芳族部分的结构特征影响。与在NG 108-15细胞