Replacement of Glycine with Dicarbonyl and Related Moieties in Analogues of the C-Terminal Pentapeptide of Cholecystokinin: CCK<sub>2</sub> Agonists Displaying a Novel Binding Mode
作者:Bruno Bellier、Marie-Emmanuelle Million、Sophie DaNascimento、Hervé Meudal、Safia Kellou、Bernard Maigret、Christiane Garbay
DOI:10.1021/jm0000416
日期:2000.10.1
known to possess sufficient structural features for CCK(2) recognition, none shares the properties of BC 264. Hence we have developed new short peptidic or pseudo-peptidic derivatives containing the C-terminal tetrapeptide of BC 264. Our results indicate that some compounds characterized by the presence of two carbonyl groups at the N-terminus, as in 2b (HO(2)C-CH(2)-CONH-Trp-(NMe)Nle-Asp-Phe-NH(2)), are
胆囊收缩素领域的最新进展表明可能发生CCK(2)受体的多个亲和状态。此外,进行“体外”和“体内”的许多药理实验支持与CCK(2)配体相关的不同药理学谱的可能。确实,一些激动剂本质上是焦虑症,并且在记忆力测试中无效,而另一些激动剂不是焦虑症,并且看起来能够增强记忆力。后一种情况的参考化合物是CCK-8类似物BC 264(Boc-Tyr(SO(3)H)-gNle-mGly-Trp-(NMe)Nle-Asp-Phe-NH(2))。但是,尽管已知基于CCK-4(Trp-Met-Asp-Phe-NH(2))的四肽配体具有足够的结构特征以识别CCK(2),但没有一个具有BC 264的特性。因此,我们开发了含有BC 264 C端四肽的新型短肽或伪肽衍生物。我们的结果表明,某些化合物的特征是在N端存在两个羰基,如2b(HO(2) C-CH(2)-CONH-Trp-(NMe)Nle-Asp-Phe-NH(2))可能显示BC