基础科学和病原发生学
Rory Boyle1, Hao Xu2, Katheryn A Q Cousins2
1Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
与白人成年人相比,黑人成年人表现出加速表观遗传衰老,与较低的Aβ42 / Aβ40水平有关,这表明阿尔茨海默病生物标志物的潜在种族差异.
科学领域:
- 表观遗传学和衰老研究.
- 神经退行性疾病生物标志物神经退行性疾病生物标志物
- 在健康方面的种族差异.
背景情况:
- 以前的研究表明,黑人个体的表观遗传衰老加速,与认知能力下降有关.
- 表观遗传衰老差异与阿尔茨海默病 (AD) 之间的关系需要进一步研究.
研究的目的:
- 为了调查黑人和白人成年人间表观遗传衰老的种族差异.
- 为了确定加速表观遗传衰老和AD血生物标志物在多样化的临床队列之间的关联.
主要方法:
- 利用来自宾夕法尼亚大学医学生物库的618名参与者 (50岁以上) 的数据.
- 从DNA甲基化数据中使用DunedinPACE评估表观遗传衰老.
- 测量了AD的血生物标志物,包括p-tau217和Aβ42/Aβ40比率.
主要成果:
- 与白人成年人相比,黑人成年人表现出明显加快的表观遗传衰老 (DunedinPACE),无论年龄和性别如何.
- 加速衰老与Aβ42/Aβ40水平有负相关性,这表明粉样蛋白负担较高.
- 一个边际的相互作用表明,这种关联可能在黑人成年人中更强.
结论:
- 黑人成年人与白人成年人相比,表观遗传衰老加速,并且与较低的Aβ42 / Aβ40水平有关.
- 在黑人成年人中,表观遗传衰老和AD生物标志物之间的关联可能更强.
- 需要对更具代表性的数据集进行进一步的研究,以验证这些发现并提高概括性.
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