Mas1受体激活是必要的,并且足以转化PAH中的ACE2效应,但Ang(1-7) 单独是不够的
James West1, Megha Talati1, Erica Carrier1
1Division of Allergy, Pulmonary, and Critical Care Medicine Vanderbilt University Medical Center Nashville Tennessee USA.
Pulmonary circulation
|April 18, 2025
概括
ангиотензин转化酶2 (ACE2) 在肺高血压方面显示出有前途. 直接激活Mas1受体,而不是单独的Ang(1-7) 可能会复制ACE2
科学领域:
- 心血管研究研究心血管研究
- 分子医学是分子医学.
- 肺高血压的病理生理学
背景情况:
- ангиотензин转化酶2 (ACE2) 在临床前和早期人类研究中显示出肺高血压 (PH) 的治疗潜力.
- 制造方面的挑战和短的体内半衰期限制了酶活性ACE2的临床效用.
- 了解ACE2的作用机制对于开发替代治疗策略至关重要.
研究的目的:
- 调查Mas1受体信号是否调解了ACE2在肺高血压中的治疗作用.
- 为了确定 ангиотензин-(1-7) [Ang(1-7) ]是否足以作为ACE2治疗作用的Mas1受体配体.
- 确定负责ACE2在PH中的有益作用的下游分子通路.
主要方法:
- 使用Mas1淘汰赛小鼠来评估Mas1信号对ACE2有效性的必要性.
- 用了一种Mas1激动剂 (AR234960) 来评估其复制ACE2治疗效果的能力.
- 测试了Ang{1-7) 的稳定形式,以确定其作为Mas1配体的充分性.
- 采用RNA测序 (RNA-seq) 来探索下游分子变化.
主要成果:
- 在Mas1淘汰赛小鼠中,ACE2的治疗效果被取消,这证实了Mas1激活的必要性.
- 马斯1激动因子AR234960复制了ACE2的治疗效益,确定了马斯1激活的充分性.
- 与蛋白酶抑制剂稳定的Ang{1-7) 和Ang{1-7) 都没有复制ACE2的有效性,这表明Ang{1-7) 单独是不够的.
- RNA-seq数据表明,Mas1激活可以挽救细胞骨和微管缺陷,这是关键的下游机制.
结论:
- 直接激活Mas1受体是肺动脉高血压 (PAH) 的可行的治疗策略.
- 单独的 ангиотензин-(1-7) 不足以调解ACE2所观察到的治疗效果.
- 在这种情况下,需要进一步研究以确定负责Mas1激活的内源性联体.
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