常见的DNA序列变异影响非洲人口的表观遗传衰老
Gillian L Meeks1, Brooke Scelza2, Hana M Asnake3
1Integrative Genetics and Genomics Graduate Program, University of California Davis, Davis, CA, USA.
Communications biology
|November 5, 2025
概括
表观遗传年龄预测模型显示,由于DNA序列变异,未经研究的人口中错误率更高. 考虑甲基化定量特征位点 (meQTL) 的新模型提高了跨多种遗传背景的准确性,揭示了影响寿命的遗传因素.
科学领域:
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 人口健康 人口健康
背景情况:
- 衰老会导致全基因组DNA甲基化变化,从而使表观遗传预测年龄.
- 目前的表观遗传年龄模型偏向于欧洲祖先的个体,并且不考虑甲基化定量特征位点 (meQTL).
研究的目的:
- 评估未经研究的非洲人群中的表观遗传年龄预测准确性.
- 通过考虑跨多种遗传背景的meQTL效应,开发出更准确的表观遗传年龄预测器.
- 研究遗传变异,表观遗传年龄和寿命之间的关系.
主要方法:
- 对巴卡,‡Khomani San和Himba群体的DNA甲基化和基因型数据的分析.
- 现有的表观遗传年龄预测器在这些队列中的表现与欧洲祖先个体的比较.
- 开发一种新的年龄预测模型,将meQTL信息纳入其中.
主要成果:
- 发表的表观遗传年龄预测器在研究的非洲人群中,与欧洲祖先的个人相比,显示出更高的平均误差.
- 无法计算的DNA序列变异显著影响预测器的准确性.
- 新的meQTL感知模型在各种基因背景中表现出一致的准确性.
- 老年人和表观遗传年龄加速较低的人拥有更多与降低表观遗传年龄相关的遗传变异.
结论:
- 表观遗传年龄预测需要对各种遗传背景具有稳健性的模型.
- 可遗传的遗传因素共同影响人类的健康,寿命和长寿.
- 考虑到meQTL对于在不同人群中准确和公平地预测表观遗传年龄至关重要.
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