Various TRH analogs, γ-butyrolactone-γ-carbonyl-His-Pro-NHR, γ-butyrolactone-γ-carbonyl-N3-im-methyl-His-Pro-NHR, 2-ketopiperidine-6-carbonyl-His-Pro-NHR and 3-oxoperhydro-1, 4-thiazine-5-carbonyl-His-Pro-NHR (R=H, methyl, ethyl, n-propyl, n-butyl, n-amyl, n-hexyl, β-phenethyl) were synthesized and pharmacologically tested in the hope of separating the central nervous action from endocrine activity. Among them, γ-butyrolactone-γ-carbonyl-His-Pro-NH2 was found to have potent central nervous actions in antagonizing pentobarbital sleep and in potentiating apomorphine-induced circling in mice, and only nominal TSH-releasing activity in rats.
各种 TRH 类似物、
γ-丁内酯-γ-羰基-His-Pro-NHR、
γ-丁内酯-γ-羰基-N3-im-甲基-His-Pro-NHR、2-酮
哌啶-6-羰基-His-Pro- NHR 和 3-氧代过氢-1, 4-
噻嗪-5-羰基-His-Pro-NHR(R=H、甲基、乙基、正丙基、正丁基、正戊基、正己基、β-苯乙基)合成并进行药理学测试,希望将中枢神经作用与内分泌活动分开。其中,
γ-丁内酯-γ-羰基-His-Pro-NH2被发现在拮抗
戊巴比妥睡眠和增强小鼠
阿朴吗啡诱导的循环方面具有有效的中枢神经作用,而在大鼠中仅具有名义上的
TSH释放活性。