β-基酸和线粒体介导中链脂肪酸,DHA和轻度认知障碍之间的关联:一个嵌套的病例对照研究
Tong Yang1,2,3, Huilian Duan2,3,4, Yuan Li2,3,4
1Department of Epidemiology & Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, People's Republic of China.
Nutritional neuroscience
|September 3, 2024
概括
高水平的中链脂肪酸 (MCFA),如乙酸和多可萨赫萨酸 (DHA) 与轻度认知障碍 (MCI) 的风险降低有关. 这些脂肪酸可能通过涉及β-基酸 (BHB) 和线粒体功能的机制影响MCI.
科学领域:
- 营养神经科学 营养神经科学
- 线粒体生物学 线粒体生物学
- 认知衰老研究 认知衰老研究
背景情况:
- 轻度认知障碍 (MCI) 在老年人群中越来越令人担忧.
- 中链脂肪酸 (MCFA) 和 docosahexaenoic 酸 (DHA) 是具有潜在神经保护作用的饮食成分.
- 涉及β-基酸盐 (BHB),线粒体DNA复制号 (mtDNAcn) 和线粒体DNA (mtDNA) 删除的机制被假设为调解这些效应.
研究的目的:
- 调查血清中MCFA (特别是酸) 和DHA水平与患MCI的风险之间的关联.
- 探索BHB,mtDNAcn和mtDNA删除在这些关系中的潜在调解作用.
主要方法:
- 来自天津老年人营养和认知 (TENC) 队列研究的数据分析.
- 包括120个MCI病例和120个匹配的对照.
- 条件逻辑回归和调解效应分析的应用.
主要成果:
- 血清中酸和DHA水平的升高与MCI风险的降低显著相关.
- 较高的线粒体DNA拷贝数 (mtDNAcn) 与降低MCI风险有关,而mtDNA删除的增加与较高的MCI风险相关.
- 调解分析表明,BHB和mtDNAcn调解了酸对MCI风险的影响,而mtDNA缺失则调解了DHA的影响.
结论:
- 高度的乙酸和DHA在血清中具有抗MCI的保护作用.
- 八酸的神经保护作用可能涉及BHB和线粒体功能.
- DHA对MCI的保护作用似乎是由线粒体功能和/或线粒体DNA完整性介导的.
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