在上腺皮质中产生依赖于 ангиотензин II 的阿尔多素
Anastasios Lymperopoulos1, Jordana I Borges1, Malka S Suster1
1From the Laboratory for the Study of Neurohormonal Control of the Circulation, Department of Pharmaceutical Sciences, Barry and Judy Silverman College of Pharmacy, Nova Southeastern University, Fort Lauderdale, FL, United States.
Vitamins and hormones
|February 26, 2024
概括
阿尔多斯特的产生是由血管素II (AngII) 通过上腺区球细胞中的两个关键通路调节的. ангиотензин受体阻断剂 (ARBs) 有效地抑制这些通路.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 上腺皮质产生类固醇激素,而阿尔多斯调节矿物质皮质类固醇活性.
- 阿尔多斯特在需要时合成和分泌,而不是储存,以响应诸如 ангиотензин II (AngII) 和高血症等刺激.
- AngII通过G蛋白结合受体 (GPCR) 调解其作用,包括AngII类型1受体 (AT1R).
研究的目的:
- 描述AT1R在区域质细胞中激活的两个主要信号通路,导致阿尔多素的产生.
- 突出Gq/11蛋白质,信号传递,β-arrestins和ERK激活在阿尔多的生物合成中的作用.
- 讨论AT1R抗剂 (ARBs) 在抑制这些阿尔多生成途径方面的药理疗效.
主要方法:
- 在上腺区球蛋白细胞中AT1R信号传递的基础分子机制的审查.
- 分析了Gq/11,脂酶C,细胞内,β-arrestins和ERK通路的作用.
- 评估AT1R对抗剂对G蛋白和β-arrestin信号传递的影响.
主要成果:
- AT1R激活通过Gq/11介导的增加和β-阿雷斯介导的ERK激活刺激阿尔多的合成.
- 这两种途径都汇聚在一起,以调节并激活类固醇性急性调节 (StAR) 蛋白,这对阿尔多的生物合成至关重要.
- 目前可用的AT1R抗剂 (ARB) 具有反向激动作用,有效地抑制了G蛋白和β-阿雷斯信号传递.
结论:
- 两个截然不同的但相互关联的途径介导AT1R诱导的阿尔多素生产.
- 在这两种途径中,StAR蛋白激活是关键的下游事件.
- ARBs通过向G蛋白和β-arrestin介导的AT1R信号传递来有效地抑制阿尔多斯特合成.
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