急性炼改变了老龄化和阿尔茨海默病中的大脑葡萄糖代谢
Zachary D Green1,2, Casey S John1,2, Paul J Kueck1,2
1University of Kansas Alzheimer's Disease Research Center, Fairway, KS, USA.
The Journal of physiology
|September 11, 2024
概括
在老年人中,有氧运动降低了大脑葡萄糖代谢,无论认知健康状况如何. 这种变化与血液中乳酸的增加有关,这表明乳酸可能在运动期间为大脑提供燃料.
科学领域:
- 神经科学是一个神经科学.
- 运动生理学 运动生理学
- 代谢过程中的代谢.
背景情况:
- 众所周知,有氧运动有益于大脑健康.
- 运动期间大脑中精确的急性生理反应,特别是在老年或认知障碍的个体中,仍然是不充分的特征.
- 了解这些反应对于优化对认知健康的运动干预至关重要.
研究的目的:
- 描述老年人对中度和高强度有氧运动的急性大脑反应.
- 为了研究运动后大脑葡萄糖代谢和血液生物标志物的变化.
- 探索运动强度,乳酸反应和大脑新陈代谢之间的关系.
主要方法:
- 一项随机对照试验 (AEROBIC,NCT04299308) 涉及60名老年人 (30名认知健康,30名认知受损).
- 参与者在休息状态下和急性运动后接受氧葡萄糖正子发射断层扫描 (FDG-PET) 扫描,适度 (45-55%HRR) 或更高 (65-75%HRR) 的强度.
- 血液生物标志物,包括乳酸盐,被测量为次要结局.
主要成果:
- 与休息相比,急性运动显著降低了全灰质脑葡萄糖代谢 (FDG-PET SUVR),无论认知状态如何.
- 与中等强度运动相比,高强度运动引起了血液乳酸盐水平的更大增加.
- 大脑葡萄糖代谢的变化与血液乳酸盐水平的变化有显著的相关性,这表明乳酸盐作为大脑燃料的作用.
结论:
- 急性有氧运动导致老年人,包括认知障碍患者的全球大脑葡萄糖代谢减少.
- 运动对血液乳酸的反应依赖于强度,并与大脑新陈代谢的变化有关.
- 乳酸可以作为身体活动期间大脑的关键燃料来源,需要进一步调查大脑的乳酸代谢.
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