基础科学和病原发生学
Sathyaseelan Chakkarai1, Mohsen Sharifi Tabar2, Xueqiu Jian1
1University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
这项研究发现了新的基因位置与环境因素相互作用,影响阿尔茨海默病 (AD) 风险标志物. 可修改的生活方式因素显著影响遗传倾向,为AD提供新的预防和治疗策略.
科学领域:
- 神经遗传学 神经遗传学
- 环境健康 环境健康
- 医疗成像医学成像
背景情况:
- 流行病学研究将环境暴露与阿尔茨海默病和相关疾病 (ADRD) 风险联系起来.
- ADRD的临床前阶段很长,因此对环境破坏和大脑影响的分子机制的理解不佳.
- 由于定义环境变量和研究异质性,研究基因环境相互作用是复杂的.
研究的目的:
- 识别对大脑结构环境影响敏感的遗传位点 (变异定量特征位点或vQTL).
- 为了研究环境因素如何在临床前ADRD标志物中调解基因环境相互作用.
- 利用英国生物银行数据对基因组,成像和风险因素概况进行全面分析.
主要方法:
- 利用英国生物库数据 (N=45,275) 来绘制海马体积 (HV),白质超强度 (WMH) 和扩散MRI指标 (FA,MD) 的vQTL.
- 在表型变异中使用偏差来检测具有环境敏感性的vQTL.
- 应用线性混合模型来识别通过vQTL关联调解的环境暴露.
主要成果:
- 确定了五个新的全基因组显著的 WMH 负担位置和 HV 和 FA 的暗示位置.
- 发现,久坐不动的行为和生活方式因素 (吸烟,酒精) 调解了2q12.3 (ST6GAL2),10p11.22 (ZEB1) 和17p11.2 (EPN2) 位点与WMH.
- 发现ZEB1调节与炎症性肠道疾病相关的肠道微生物群物种,ST6GAL2是与饮酒相关的炎症生物标志物;脏中的风险基因被降低调节,在脏细胞类型中被丰富.
结论:
- 确定了与环境因素相互作用的全基因组新型位点,并与阿尔茨海默病的临床前MRI标志物相关.
- 突出了可修改的生活方式因素对ADRD遗传风险的影响.
- 基于已识别的基因环境相互作用,提出了潜在的预防和治疗策略,并强调了在多样化的队列中复制的必要性.
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