与阿尔茨海默氏症相关的ACE变体增加了ACE1的催化活性和血管新生素II的产生
Miranda A Salvo1, Leah K Cuddy1, Dmitry Prokopenko2
1Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
The Journal of biological chemistry
|January 22, 2026
概括
血管酶转化酶 (ACE) 基因中的新阿尔茨海默病 (AD) 风险变异增加了其活性. 这导致血管新生素II的水平提高,该分子与神经退行有关,进一步涉及ACE在AD病变发生过程中.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- ангиотензин转化酶 (ACE) 是已知的晚发性阿尔茨海默病 (AD) 的遗传风险因素.
- 关联ACE活性与AD病变的确切机制尚不清楚,尽管它已知在产生血管素II和加工粉样β中的作用.
- 之前的研究发现了一种ACE变体 (rs4980),通过中央氨酸-血管新生素系统增加神经退行.
研究的目的:
- 调查与AD风险增加相关的两个新型ACE变体 (rs3730043 [T916M]和rs142947404 [N1036K]) 的功能影响.
- 确定这些变异如何影响ACE蛋白处理,细胞表面贩运和催化活性.
主要方法:
- 使用SH-SY5Y稳定细胞系表达野生型和突变的ACE变体 (T916M,N1036K).
- 评估了ACE蛋白向细胞表面的贩运.
- 测量了ACE催化活性和量化了血管酶II的产生.
主要成果:
- 通过T916M和N1036K变体,ACE蛋白向细胞表面的运输没有受到改变.
- 与野生类型相比,T916M和N1036K突变ACE都表现出较高的催化活性.
- 突变细胞系中ACE活性升高导致血管素II的产生增加.
结论:
- 已识别的ACE变体 (T916M和N1036K) 增强了ACE的催化功能.
- 由于这些变体而增加的血管素II产生提供了与阿尔茨海默病风险相关的潜在机制.
- 这些发现强化了ACE在阿尔茨海默病发病过程中的作用,并强调了需要进一步调查的必要性.
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