肉类摄入量与生物衰老之间的因果关系:来自孟德尔随机化分析的证据
Shupeng Liu1, Yinyun Deng1, Hui Liu1
1Department of Radiation medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China.
Nutrients
|August 10, 2024
概括
增加肉类消费可能会加速生物衰老,特别是DNA甲基化. 羊羔的摄入量对线粒体DNA拷贝数有积极的影响,而加工肉对端粒长度有负面影响,这表明了健康衰老的饮食策略.
科学领域:
- 营养科学 营养科学
- 遗传学 遗传学是一种遗传学.
- 老年学是一门学科.
背景情况:
- 饮食肉类消费影响健康和衰老,但因果关系尚未完全理解.
- 肉类和制备方法的变化可能会对老化表型产生不同的影响.
研究的目的:
- 通过使用孟德尔随机化 (MR) 来研究不同类型的肉类摄入量和与衰老相关的表型之间的因果关系.
- 为旨在促进健康衰老的饮食建议提供科学依据.
主要方法:
- 利用孟德尔的随机化 (MR),将遗传变异作为肉类摄入量的工具变量 (IV).
- 采用灵敏度分析和多种MR方法 (MR-Egger,IVW,加权中位数) 来确保稳定性和评估性.
- 使用F-统计学评估IV强度,并测试型和异质性.
主要成果:
- 在肉类消费和DNA甲基化之间观察到一种积极的因果关系,即PhenoAge加速,表明生物衰老加速.
- 羔羊的摄入量显示出与线粒体DNA拷贝数的积极因果关系.
- 加工肉类的消费表明对端粒长度有负面的因果关系.
结论:
- 肉类摄入量,特别是加工品种,可以因果关系地影响衰老生物标志物,如DNA甲基化PhenoAge和端粒长度.
- 特定的肉类,如羊肉,可能会影响细胞衰老标记 (线粒体DNA复制号).
- 研究结果强调了肉类加工和制备在老化过程中的重要性,并提出了长寿的潜在饮食干预措施.
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