缺乏ACE2可以防止因血红蛋白引起的急性损伤
Anthony J Croatt1, Raman Deep Singh1, Joseph P Grande1
1Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, Minnesota, United States.
American journal of physiology. Renal physiology
|March 25, 2025
概括
缺乏血管酶转化酶2 (ACE2) 的小鼠显示出对血红蛋白介导的急性损伤的保护. 这表明ACE2促进,毒素的入,揭示了新的损伤途径.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- ангиотензин转化酶2 (ACE2) 与SARS-CoV-2尖端蛋白相互作用并与heme结合.
- 血红蛋白介导的急性损伤 (HP-AKI) 涉及中的血红蛋白含量增加.
- 在HP-AKI中ACE2的血红素结合性质的作用尚不清楚.
研究的目的:
- 调查ACE2在HP-AKI中的血红素结合性质的病理生物学相关性.
- 为了确定ACE2缺乏对HP-AKI的保护作用.
- 探索血红素和血红素蛋白对ACE2表达的影响.
主要方法:
- 在ACE2-野生型和ACE2-缺乏小鼠中使用了糖诱导的HP-AKI模型.
- 在相关条件下量化和细胞血含量.
- 评估了损伤标志物,亡,铁亡和HO-1表达.
主要成果:
- 缺乏ACE2的小鼠对HP-AKI有显著的保护,显示损伤和亡/亡标志物减少.
- 缺乏ACE2的小鼠表现出较低的脏血含量和减弱的HO-1诱导.
- 血红素暴露增加了ACE2过度表达细胞中的血红素保留;肌球蛋白和血红素减少了体内ACE2的表达.
结论:
- 缺少ACE2可防止HP-AKI,可能是通过限制内血的进入.
- 这项研究揭示了一种新的血红素依赖性急性损伤的途径.
- 血红蛋白和血红蛋白被确定为ACE2表达的新型决定因素.
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