在绝经后的妇女中,短期使用雌激醇并不能恢复内末林-B受体介导的血管扩张
Virginia R Nuckols1, Leena N Shoemaker2, Andrew V Kuczmarski1
1Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware, United States.
American journal of physiology. Heart and circulatory physiology
|January 8, 2025
概括
雌激醇 (E2) 在绝经后的妇女中不会恢复内甲素-B受体 (ETBR) 介导的血管扩张. 这项研究发现,E2的使用未能改善这一群体的微血管内皮功能,与年轻女性不同.
科学领域:
- 心血管生理学心血管生理学
- 内分泌学 在内分泌学.
- 生殖生物学 生殖生物学
背景情况:
- 末端蛋白-B受体 (ETBR) 在年轻女性中介导血管扩张,但在绝经后的女性中,这种效果会消失.
- 雌激醇 (E2) 调节了在绝经前妇女中ETBR介导的血管扩张.
- 对于E2对绝经后妇女ETBR功能的影响尚不清楚.
研究的目的:
- 为了测试雌二醇 (E2) 给药是否会恢复经过ETBR介导的绝经后妇女的血管扩张.
- 调查外源E2对绝经后妇女皮肤微血管内皮功能的影响.
主要方法:
- 10名健康的绝经后妇女接受了7天的通过皮肤输送的雌激素 (E2).
- 使用激光多普勒流量计和皮内微透析来评估微血管内皮功能.
- 使用ETBR抗体 (BQ-788) 在基线和E2后阻断ETBR功能.
主要成果:
- 雌激醇 (E2) 给药对绝经后妇女的ETBR功能没有显著影响.
- 在E2施用期间,ETBR阻塞并没有改变皮肤微血管血管扩大反应对局部加热的反应.
- 这些发现与以前在绝经前妇女身上观察到的结果形成鲜明对比.
结论:
- 外源性雌激醇的使用不会恢复绝经后妇女体内内素-B受体 (ETBR) 介导的血管扩张.
- 在绝经后,ETBR介导的血管扩张的丧失不会通过E2补充而逆转.
- 这表明E2在调节血管功能的作用在绝经前和绝经后的状态之间有显著差异.
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