内在的有氧能力调节阿尔茨海默病的病理特征,大脑线粒体功能和蛋白质组在衰老过程中
Benjamin A Kugler1, Colton R Lysaker2, Edziu Franczak1
1University of Kansas Medical Center Department of Cell Biology and Physiology and Internal Medicine, Kansas City, KS, USA.
GeroScience
|June 12, 2024
概括
低有氧能力与较高的阿尔茨海默氏症相关.
科学领域:
- 神经科学是一个神经科学.
- 线粒体生物学 线粒体生物学
- 衰老研究研究 衰老研究
背景情况:
- 低有氧能力与增加的死亡率和阿尔茨海默病 (AD) 风险相关.
- 将有氧能力与阿尔茨海默氏症联系在一起的潜在机制尚不清楚,可能涉及性别差异和线粒体功能.
- 以前的研究表明,早期痴呆症患者的有氧能力降低.
研究的目的:
- 研究老老鼠内在的有氧运动能力,大脑线粒体能量和AD病理之间的关系.
- 在低容量与高容量跑步老鼠中探索线粒体功能和AD标志物的性别特异性差异.
主要方法:
- 使用选择性繁殖的雄性和雌性低容量跑步者 (LCR) 和高容量跑步者 (HCR) 老鼠,分别在18个月和24个月大.
- 对线粒体呼吸,粉样β (Aβ42) 和高酸化 (pTau) 的标志物进行分析的大脑组织.
- 进行蛋白质组分析以评估线粒体蛋白质组的差异,包括氧化酸化 (OXPHOS) 和三碳酸 (TCA) 循环蛋白.
主要成果:
- 随着年龄的增长,LCR大鼠表现出大脑Aβ42和pTau的增加,不论性别.
- 雌性LCR大鼠表现出大脑线粒体呼吸和ATP相关呼吸的减少.
- 与HCR大鼠相比,雄性LCR大鼠表现出减少复杂II刺激呼吸,改变OXPHOS和减少TCA循环蛋白.
结论:
- 内在的有氧运动能力与老化过程中的大脑线粒体功能障碍和AD病理有着强烈的关联.
- 在线粒体呼吸和蛋白质组形状存在LCR和HCR大鼠之间的性别特异性差异.
- 这些发现凸显了线粒体能量在有氧能力和阿尔茨海默病风险之间的相互作用中的关键作用.
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