Antinociceptive and antidepressant-like action of endomorphin-2 analogs with proline surrogates in position 2
作者:Renata Perlikowska、Justyna Piekielna、Marzena Mazur、Robert Koralewski、Jacek Olczak、Jean-Claude do Rego、Jakub Fichna、Jakub Modranka、Tomasz Janecki、Anna Janecka
DOI:10.1016/j.bmc.2014.06.056
日期:2014.9
locomotor activity. The antidepressant-like effect was reversed by the δ-selective antagonist, naltrindole (NLT) and κ-selective nor-binaltorphimine (nor-BNI). Thus, the experiments with selective opioid receptor antagonists revealed that analgesic action of analog 2a was mediated through the MOR, while the δ- and κ-receptors (DOR and KOR, respectively) were engaged in the antidepressant-like activity. Analog
在我们努力开发具有抗伤害性和/或抗抑郁样活性的新候选药物的过程中,使用以下方法合成了两个新的内啡肽2(EM-2,Tyr-Pro-Phe-Phe-NH 2)类似物,其中2位含有脯氨酸替代物。市售外消旋的反式-4-苯基吡咯烷-3-羧酸(4-Ph-β-Pro)。通过HPLC分离获得的两种非对映异构体肽(2a和2b)的混合物,并且两种对映纯类似物都用于体外和体内研究。为了将绝对构型分配给两个肽中的4-Ph-β-Pro残基,(3 R,4 S进行)-4-苯基吡咯烷-3-羧酸,并将该对映异构体引入EM-2序列的2位。基于HPLC保留时间,我们能够指定两种肽类似物中4-Ph-β-Pro残基的绝对构型。模拟图2a掺入(3 - [R,4小号)-4-Ph-β-Pro残留物在脑室内(icv)给药后在小鼠中产生了强烈的镇痛作用,这种作用被μ阿片受体(MOR)拮抗剂β-氟苯胺(β-FNA)拮抗。这种类似物还影响了小鼠