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中枢和外周“毒蕈碱敏感型”乙酰胆碱受体的立体特异性比较:用丙环定和三环己哌酯对映体形式的观察结果

A comparison of stereospecificity at central and peripheral 'muscarine-sensitive' acetylcholine receptors: observations with the enantiomeric forms of procyclidine and tricyclamol.

作者信息

Barlow R B, Dawbarn D, Pycock C J

出版信息

Br J Pharmacol. 1981 Feb;72(2):277-80. doi: 10.1111/j.1476-5381.1981.tb09125.x.

Abstract

1 Procyclidine resembles hyoscine in enhancing the effects of amphetamine on ipsiversive turning by mice with a unilateral central dopamine lesion. 2 The stereospecific index for procyclidine is not greater than 10, in contrast to 173 for acetylcholine receptors in ileum from the same mice. 3 This suggests that although the central effects of procyclidine in this test involve acetylcholine receptors similar to those at peripheral sites, they cannot be identical with them unless there are differences at some secondary site, for example, if the weaker enantiomer were a stronger inhibitor of dopamine uptake or if there were a stereoselective uptake process for procyclidine itself.

摘要
  1. 丙环定在增强苯丙胺对单侧中枢多巴胺损伤小鼠向患侧翻转作用方面类似于东莨菪碱。2. 丙环定的立体特异性指数不大于10,而同一小鼠回肠中乙酰胆碱受体的立体特异性指数为173。3. 这表明,尽管丙环定在该试验中的中枢效应涉及与外周部位相似的乙酰胆碱受体,但除非在某些二级位点存在差异,例如,如果较弱的对映体是更强的多巴胺摄取抑制剂,或者丙环定本身存在立体选择性摄取过程,否则它们不可能完全相同。

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