基础科学和病原发生学
Oluwatosin A Olayinka1,2, John J Farrell2,3,4,5, Congcong Zhu2,3,4
1Boston University Bioinformatics Program, Boston, MA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
这项研究表明,罕见变异 (RVs) 显著影响阿尔茨海默病 (AD) 风险,即使在具有低多基因风险评分 (PRS) 的个体中也是如此. 通过PRS分层增强了与AD相关的新型RV和低频变体 (LVs) 的发现.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 计算生物学 计算生物学
背景情况:
- 多遗传风险评分 (PRS) 通常使用常见变异来估计阿尔茨海默氏症 (AD) 等疾病的遗传风险.
- 虽然罕见变异 (RVs) 不包括在标准PRS中,但已知它们对AD病变产生有显著的贡献.
- 这项研究旨在利用PRS识别AD中RVs的新兴关联.
研究的目的:
- 调查罕见变异 (RVs) 与阿尔茨海默病 (AD) 风险的关联.
- 为了确定是否通过多基因风险评分 (PRS) 对个体进行分层增强了与AD相关的RV和低频变体 (LVs) 的发现.
- 为了探索RVs与个人的遗传背景风险相反的影响.
主要方法:
- 来自阿尔茨海默氏病测序项目 (ADSP) R4数据集的非西班牙裔白人 (NHW) 样本 (n=11,409) 的计算PRS.
- 根据中位数将参与者分为高 (n=5,442) 和低 (n=5,967) 的PRS组.
- 在每个PRS组中单独使用回归模型分析了11,485,531种低频变异 (LVs) 和RVs (MAC>5) 与AD相关.
主要成果:
- 在低PRS和高PRS组中确定了RVs和LVs与AD的全基因组显著关联.
- 观察到低PRS组中的风险变异和高PRS组中的保护变异的不成比例丰富.
- 在不同的PRS层中发现了与AD风险增加或减少相关的特定RV和LV,而在相反的层中没有关联.
结论:
- 根据基于常见变异的PRS对个体进行分层,可以更好地检测RV和LV与AD的关联.
- 一个人的PRS可能不准确地反映了他们对AD的整体遗传相对风险.
- 该研究确定了独特的RV,这些RV的风险与个体的遗传背景相反,为研究提供了新的途径.
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