基于区域的功能性注释分析确定了与印度南亚人认知功能相关的基因
Hasan Abu-Amara1, Wei Zhao1,2, Zheng Li3
1Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA.
Genes
|June 26, 2025
概括
南亚人痴呆的遗传风险因素正在被揭露. 全基因组测序确定了印度成年人特定基因变异和认知功能之间的关联,包括在这个人群中丰富的新型变异.
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:
- 在印度,65岁以上的南亚人中痴呆的高患病率.
- 在这个人口群体中,对痴呆的遗传风险因素的理解有限.
- 需要调查不同人群认知能力下降的遗传基础.
研究的目的:
- 在南亚人中使用全基因组测序识别痴呆症的遗传风险因素.
- 探索基因变异和认知功能措施之间的关联.
- 为了研究在南亚人群中潜在丰富的新型遗传变异.
主要方法:
- 印度长度衰老研究 (LASI-DAD) 的2680名参与者的全基因组序列数据.
- 在84个与阿尔茨海默病相关的基因中,基因分析错误感/功能丧失 (LoF) 和脑特异变体.
- 使用STAAR.使用认知功能测量 (HMSE,一般认知功能,五个领域) 的关联测试.
主要成果:
- 三个基因 (APOE,PICALM,TSPOAP1) 显示出与认知功能指标的显著关联 (FDR q < 0.1).
- APOE变异与四个认知指标相关;PICALM与HMSE得分;TSPOAP1与执行功能相关.
- 与欧洲祖先相比,一个罕见的PICALM误解变体 (rs779406084) 在LASI-DAD参与者中得到了丰富.
结论:
- 之前与阿尔茨海默病相关的基因中的Missense/LoF变异在欧洲祖先种群中与印度南亚人的认知功能有关.
- 全基因组测序有助于发现南亚人群特有的潜在新型因果变异.
- 调查结果强调了为了解痴呆症风险而进行人口特异性遗传分析的重要性.
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