埃尔戈米特林刺激了隔离的人类心房中的组胺H2受体
Hannes Jacob1, Pauline Braekow1, Britt Hofmann2
1Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, 06097, Halle (Saale), Germany.
Naunyn-Schmiedeberg's archives of pharmacology
|June 24, 2023
概括
埃尔戈米特林作为对心脏中的人体组胺H2受体 (hH2R) 的激动剂,增加收缩和跳动率. 这种效应在转基因小鼠和人类心房制剂中观察到,通过hH2R激活介导.
科学领域:
- 药理学 药理学是指药理学的学科.
- 心血管生理学心血管生理学
背景情况:
- 众所周知,厄戈美与动物心脏中的血清素和胰岛素受体相互作用.
- 埃尔戈米特林对人类受体的特定心脏作用尚未完全阐明.
研究的目的:
- 为了调查厄戈美林是否激活心脏组织中的人体血清素5-HT4受体 (h5-HT4R) 和/或人体组胺H2受体 (hH2R).
- 确定 ergometrine 与这些受体相互作用对心脏收缩性和心率的功能后果.
主要方法:
- 实验使用转基因小鼠在心脏中过度表达h5-HT4R或hH2R,以及分离的人类心房制剂.
- 测量包括各种心脏准备剂 (兰根多夫,心房条纹) 的收缩力和心跳率.
- 进行了西部斑分析以评估索兰班酸化,并进行了受体结合测试.
主要成果:
- 在H2-TG小鼠和人类心房制剂中,埃尔戈米特林表现出度依赖的阳性内和长作用,但在5-HT4-TG小鼠中没有.
- 这些效应与素16的索兰班酸化增加有关.
- 埃尔戈米特林对人类心房的影响被H2R抗剂cimetidine阻断,但不是5-HT4R抗剂tropisetron.
- 埃尔戈米特林对HEK细胞中的人类组胺H2受体表现出结合亲和力.
结论:
- 厄戈米特林作为心脏人类H2受体 (hH2R) 的激动剂.
- 通过 ergometrine 激活 hH2R 会导致心脏中积极的内和长效应.
- 这些发现突出了通过组胺素受体对爱尔戈美林心脏作用的特定机制.
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