生物标志物 生物标志物
Skylar Walters1, Derek B Archer1, Kwangsik Nho2
1Vanderbilt Memory & Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
这项研究确定了影响海马体体积的新型性别特异性遗传效应,这是阿尔茨海默病 (AD) 风险的关键标志物. 研究结果突出了AD的脑成像生物标志物中的遗传预测因素和性别差异.
科学领域:
- 神经成像遗传学 神经成像遗传学
- 阿尔茨海默氏症疾病研究研究
- 大脑衰老 老龄化
背景情况:
- 海马体积是阿尔茨海默病 (AD) 风险和进展的临界体内成像生物标志物.
- 之前的研究表明,在女性中,海马缩加速,AD病理性增加.
- 对海马体体积的全基因组关联研究 (GWAS) 大大排除了性别特异性遗传分析.
研究的目的:
- 在多个衰老和AD队伍中调查海马体积的性别特异性遗传结构.
- 鉴定与海马体积相关的遗传位置,考虑性别特异性影响和相互作用.
主要方法:
- 分析了来自八个衰老和AD队伍的5,523名非西班牙裔白人参与者.
- 从T1加权的MRI中对海马体积和估计的总内体积 (eTIV) 的细分.
- 全基因组关联研究 (GWAS) 在基线和纵向进行,以性别分层和性别相互作用模型进行,然后进行元分析.
主要成果:
- 确定了与海马体体积相关的三个全基因组显著的遗传位置.
- 在AKAP6附近的14号染色体上发现了一种新的位点,该位点对海马体积随时间变化产生了显著的性别特异性影响,主要在女性身上.
- 之前报告的一种AD风险变体在8号染色体上靠近SHARPIN,对男性的海马体积有显著影响,但对女性没有显著影响.
结论:
- 已知AD风险变体 (接近SHARPIN) 的扩展发现到海马体积.
- 提供了影响海马体积的新型性别特异性遗传效应的证据.
- 结果强调了考虑AD的神经成像生物标志物的遗传预测因素和性别差异的重要性.
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