基础科学和病原发生学
Emma S Luckett1,2,3,4, Yasmina Abakkouy2, Luigi Lorenzini1,4
1Amsterdam UMC location VUmc, Amsterdam, Netherlands.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
多基因风险评分 (PRS) 有效预测在临床前阿尔茨海默病中大脑粉样蛋白负担,特别是在额叶皮层. 这些遗传标记显示出识别有风险的个体的潜力,观察到显著的性别差异.
科学领域:
- 神经遗传学 神经遗传学
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 大脑粉样蛋白负荷的变化表明了潜在的生物学因素.
- 调查粉样蛋白病理学的遗传决定因素对于理解阿尔茨海默病 (AD) 至关重要.
研究的目的:
- 评估在临床前AD队列中多基因风险评分 (PRS) 和粉样蛋白负担之间的关联.
- 为了确定影响大脑中粉样蛋白沉积的遗传因素.
主要方法:
- 在867名非痴呆症参与者中,计算了AD易感性和生物标志物的PRS (CSF-Aβ42,ptau181).
- 使用线性回归来分析与粉样蛋白负担 (Centiloid) 的关联,调整共变量.
- 在高性能PRS上进行基因映射和丰富分析,并进行性别特异性分析.
主要成果:
- 在pT=1x10−5的PRS粉样蛋白显示了最强的预测对前额粉样蛋白负担 (R2=0.18).
- 在严格的值下,PRSamyloid和PRSKunkle在大脑区域之间表现出可比的预测性能.
- 丰富分析揭示了PRS (脂质稳定) 和PRS (粉样蛋白相关过程) 的独特生物途径.
- 预测性表现在额叶皮层是最高的,在男性中显示出更强的关联.
结论:
- 多基因风险评分,特别是PRS粉样蛋白和PRSKunkle,有效预测临床前AD的额头粉样蛋白负担.
- 这些发现凸显了基因分析在识别有风险的个体方面的潜力.
- 观察到的预测性表现的性别差异要求进一步调查阿尔茨海默病的遗传基础.
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