Augmentative effect of tetrandrine on pentobarbital hypnosis mediated by 5-HT_(1A) and 5-HT_(2A/2C) receptors in mice  

5-HT_(1A)和5-HT_(2A/2C)受体在粉防己碱增强戊巴比妥钠睡眠中的介导作用(英文)

作　　者：杜楠[1] 王黎恩[1] 师晓荣[1] 崔翔宇[1] 崔素颖[1] 张帆[1] 张永鹤[1] 

机构地区：[1]北京大学基础医学院药理学系,北京100191

出　　处：《Journal of Chinese Pharmaceutical Sciences》2008年第3期192-196,共5页中国药学（英文版）

基　　金：National Natural Science Foundation of China(Grant No.30772556 and 30640070);Research Fund of Janssen Research Council and the‘985'Project in Peking University.

摘　　要：It has been reported that augmentative effect of tetrandrine on pentobarbital hypnosis in mice may be related to serotonergic system. The present study was undertaken to investigate the interaction of tetrandrine and different 5-HT receptors on pentobarbital-induced sleep by using the loss-of-righting reflex method. The results showed that augmentative effect of tetrandrine on pentobarbital hypnosis in mice were potentiated by the p-MPPI （5-HT1A receptor antagonist） （1 mg/kg, i.p.） and ketanserin （5-HT2A/2C receptor antagonist） （1.5 mg/kg, i.p.）, respectively. Pretreatment with either 8-OH-DPAT （5-HT1A receptor agonist） （0.1 mg/kg, s.c.） or DOI （5-HT2A/2C receptor agonist） （0.2 mg/kg, i.p.） significantly decreased pentobarbital-induced sleep time, and tetrandrine （60 mg/kg, i.g.） significantly reversed this effect. These results suggest that both the 5-HTLA and 5-HT2A/2C subfamily may be involved in the potentiating mechanism of tetrandrine＇s effects on pantobarbital hypnosis.前期研究表明粉防己碱增强戊巴比妥钠诱导的催眠作用与5-HT系统相关。本研究采用戊巴比妥钠(45 mg/kg,i.p.)诱导的小鼠翻正反射消失和恢复实验方法,对粉防己碱与不同5-HT受体在增强戊巴比妥钠诱导睡眠中的相互作用进行了探讨。结果表明粉防己碱分别与选择性5-HT_(1A)受体拈抗剂p-MPPI(1 mg/kg,i.p.),选择性5-HT_(2A/2C)受体拮抗剂ketanserin(1.5 mg/kg,i.p.)合用可以显著增强戊巴比妥钠诱导的催眠作用。选择性5-HT_(1A)受体激动剂8-OH-DPAT(0.1 mg/kg,s.c.)或5-HT_(2A/2C)受体激动剂DOI(0.2mg/kg,i.p.)能够显著减少戊巴比妥钠诱导的小鼠睡眠时间,而粉防己碱(60 mg/kg,i.g.)可以显著拮抗这种睡眠抑制作用。此结果提示,粉防己碱增强戊巴比妥钠诱导的催眠作用可能与5-HT_(1A)受体和5-HT_(2A/2C)受体有关。

关 键 词：TETRANDRINE Pentobarbital hypnosis 5-HT1A receptor  5-HT2A/2C receptor 

分 类 号：R285.5[医药卫生—中药学]