基础科学和病原发生学
1School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong, Hong Kong.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
概括
在更年期期间雌激素的优势增加了老年痴呆症的风险,因为它破坏了神经元胆固醇平衡和能量生产. 这项研究揭示了一种关键机制,它将激素变化与老年妇女患阿尔茨海默病的易感性联系起来.
科学领域:
- 神经内分泌学神经内分泌学
- 代谢学 代谢学 代谢学
- 神经退行性疾病 神经退行性疾病
背景情况:
- 阿尔茨海默病 (AD) 中的性别差异已知,但涉及激素相互作用的潜在机制尚不清楚.
- 绝经前期的过渡与女性的认知能力下降和痴呆症风险增加有关.
- 导致绝经后妇女这种高度脆弱性的细胞变化仍然难以捉摸.
研究的目的:
- 为了研究分子机制,链接在更年期期间的荷尔蒙变化,以增加阿尔茨海默氏病 (AD) 的风险.
- 探索雌激素和孕在神经元功能和能量代谢中的作用.
- 为了确定受老化女性大脑中雌激素主导影响的细胞通路.
主要方法:
- 来自ROSMAP队列的人类大脑转录和代谢学数据的分析.
- 使用小鼠模型的体内研究:加速卵巢衰竭,ERRα淘汰赛和Lafala-AD转基因模型.
- 在小鼠模型中进行行为,转录,代谢和电生理学评估.
主要成果:
- 雌激素与孕激素比率升高 (雌激素占主导地位) 与认知和记忆能力下降相关.
- 在人类大脑数据中发现了与雌激素相关的受体α (ERRα) 的功能受损.
- 雌激素的优势破坏神经元胆固醇稳定,损害TCA循环,增加谷氨酸释放,减少ATP,增加易受AD相关的侮辱.
结论:
- 揭示了胆固醇平衡,线粒体能量生产和神经元功能之间的新联系.
- 绝经前期雌激素的优势导致老年妇女对AD和AD相关痴呆症的易感性增加.
- 这些发现突出了与阿尔茨海默病预防中的荷尔蒙调节和代谢途径相关的潜在治疗点.
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