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用[3H]美吡拉敏在哺乳动物脑膜中鉴定出组胺H1受体。

Histamine H1 receptors identified in mammalian brain membranes with [3H]mepyramine.

作者信息

Tran V T, Chang R S, Snyder S H

出版信息

Proc Natl Acad Sci U S A. 1978 Dec;75(12):6290-4. doi: 10.1073/pnas.75.12.6290.

Abstract

The antihistamine [3H]mepyramine binds to H1 histamine receptors in mammalian brain membranes. Potencies of H1 antihistamines at the binding sites correlate with their pharmacological antihistamine effects in the guinea pig ileum. Specific [3H]mepyramine binding is saturable with a dissociation constant of about 4 nM in both equilibrium and kinetic experiments and a density of 10 pmol per gram of whole kinetic experiments and a density of 10 pmol per gram of whole brain. Some tricyclic antidepressants are potent inhibitors of specific [3H]mepyramine binding. Regional variations of [3H]mepyramine binding do not correlate with variations in endogeneous histamine and histidine decarboxylase activity.

摘要

抗组胺药[3H]美吡拉敏可与哺乳动物脑膜中的H1组胺受体结合。H1抗组胺药在结合位点的效力与其在豚鼠回肠中的药理抗组胺作用相关。在平衡实验和动力学实验中,特异性[3H]美吡拉敏结合均具有饱和性,解离常数约为4 nM,每克全脑的密度为10 pmol。一些三环类抗抑郁药是特异性[3H]美吡拉敏结合的强效抑制剂。[3H]美吡拉敏结合的区域差异与内源性组胺和组胺脱羧酶活性的差异无关。

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