多种祖先的转录基因组广泛关联研究揭示了阿尔茨海默氏病的共同和特定人口的遗传效应
Xinyu Sun1,2, Makaela Mews3,2, Nicholas R Wheeler1,2
1Department of Population and Quantitative Health Sciences, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
这项研究表明,在不同人群中分析阿尔茨海默病 (AD) 遗传学可以改善基因发现. 多种人群分析发现了新的AD风险变体,并强调需要更广泛的队列纳入.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 人口健康 人口健康
背景情况:
- 阿尔茨海默病 (AD) 的遗传风险在不同的祖先群体之间有很大差异.
- 大多数以前的遗传研究都不成比例地关注非西班牙裔白人 (NHW) 队列,限制了对其他群体AD的理解.
研究的目的:
- 进行多种群的转录全基因组关联研究 (TWAS),以识别不同祖先的AD遗传风险因素.
- 改进基因表达定量特征位点 (eQTL) 的分辨率,并识别与AD风险相关的功能变异,超出已建立的全基因组关联研究 (GWAS) 信号.
主要方法:
- 利用全血RNA测序和基因型数据从NHW,非洲裔美国人 (AA) 和西班牙裔 (HISP) 参与者在MAGENTA队列.
- 采用SuShiE进行多种群的精细映射,以确定数千个基因的可信的eQTL集.
- 使用FUSION和MAFOCUS框架进行了人口分层的TWAS和元分析.
主要成果:
- 对8,748个基因确定了可信的eQTL集,与单个种群分析相比,精细映射精度得到了提高.
- 优先和精确地绘制了与AD风险相关的9个基因,包括已知的基因位点 (BIN1,PTK2B,DMPK) 具有一致的跨种群效应.
- 在NHW中发现了COG4表达和AD之间的新兴关联,这表明了戈尔吉器官功能的作用,并在BIN1位置确定了超出GWAS指数SNP的调节变异.
结论:
- 多人群精细映射增强了eQTL分辨率和TWAS解释性,揭示了传统GWAS错过的功能变体.
- 这些发现强调了在阿尔茨海默病研究中扩大非欧洲队列的必要性,以阐明共同和人口特异性疾病机制.
- 这项研究成功地确定了新的AD相关基因和调控变异,进步了对多种人群中AD病原学的理解.
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