生物标志物 生物标志物
Marie Emilie Tuil1, Bshaier Allehyany2, Rifa Sanjida Punnota2
1Imperial College London, London, United Kingdom.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
在阿尔茨海默病 (AD) 中的微质反应因阶段而异. 早期阶段显示神经毒性粉样β依赖的微质活性,而后期阶段转向神经保护,然后随着病理的进展而回到神经毒性.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 神经病理学神经病理学
背景情况:
- 微质激活是阿尔茨海默病 (AD) 病理学的核心,但它的确切作用仍在争论中.
- 证据表明,在AD.中,微质的神经毒性和神经保护性功能都存在.
- 风险因素TREM2突变会损害微质反应,而某些微质表型似乎具有保护性.
研究的目的:
- 研究AD生物标志物与认知功能之间的关联.
- 了解微质反应如何影响不同疾病阶段的AD病理.
主要方法:
- 来自ADNI数据库的323名参与者的分析.
- 分为Aβ+AD,Aβ+MCI和Aβ-MCI组的分层.
- 使用了脑脊液生物标志物 (sTREM2,GAP-43,Aβ1-42,T-tau,p-tau181),MRI,PET扫描以及认知分数 (ADAS-Cog-13) 的数据.
主要成果:
- 在MCI阶段,TREM2与tau和Aβ1-42有显著的关联,但在AD中没有.
- 在Aβ+MCI中观察到粉样蛋白和认知评分之间的负相关性.
- 在MCI和AD阶段,GAP43与Aβ1-42有关.
结论:
- 阿尔茨海默病中的微质反应是不同的,并且取决于阶段.
- 在早期的MCI中,发生了一种依赖于粉样β的神经毒性微质反应.
- 在MCI中,神经保护性微质表型在对粉样蛋白的反应中出现,在晚期AD阶段恢复神经毒性.
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