作者:T. V. Proskuryakova、Zh. D. Bespalova、M. E. Pal’keeva、O. B. Petrichenko、N. V. Pankratova、V. A. Shokhonova、I. P. Anokhina
DOI:10.1007/s11171-005-0016-6
日期:2005.3
Analogues of the endogenous peptide corresponding to the 30–33 sequence of cholecystokinin (Trp-Met-Asp-Phe-NH2) were synthesized, and their biological activity was studied. It was shown that, in rats, the N-succinylated Nle2 analogue of this tetrapeptide exhibits increased anxiolytic properties in the dark-light chamber test and an enhanced alcohol intake by both the control animals and the alcohol-dependent animals under the conditions of free choice. Introduction of an isopropyl residue into the C-terminal amide of the Nle2 analogue resulted in the appearance of anxiogenic and antialcohol activity and the ability to increase the morphine analgesic effect in the tail-flick test on rats. The two synthesized analogues retained an affinity for cholecystokinin receptors.
研究人员合成了与胆囊收缩素 30-33 序列(Trp-Met-Asp-Phe-NH2)相对应的内源性肽的类似物,并对其生物活性进行了研究。结果表明,在大鼠体内,这种四肽的 N-琥珀酰化 Nle2 类似物在暗光室试验中表现出更强的抗焦虑特性,在自由选择条件下,对照组动物和酒精依赖动物的酒精摄入量均有所提高。在 Nle2 类似物的 C 端酰胺中引入一个异丙基残基,可产生抗焦虑和抗酒精活性,并能增强吗啡在大鼠尾搔试验中的镇痛效果。合成的这两种类似物保留了对胆囊收缩素受体的亲和力。