质细胞的反应性与通过衰老和阿尔茨海默病的突触功能障碍相关
Francieli Rohden1,2, Pamela C L Ferreira1, Bruna Bellaver1
1Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
Nature communications
|July 2, 2025
概括
脑脊液中的GFAP和sTREM2等质标记物与阿尔茨海默病 (AD) 中的突触功能障碍有关. 酸化的 (pTau) 调解了这些关联,突出了神经退行症中的质作用.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 质和神经元的变化与阿尔茨海默氏症 (AD) 病原发生有关.
- 活着的个体中质标记物和突触功能障碍之间的直接联系尚未完全理解.
研究的目的:
- 调查脑脊液 (CSF) 中的质反应和突触功能障碍生物标志物之间的关联.
- 探索质标记物在认知不受损 (CU) 和认知受损 (CI) 个体中的作用.
主要方法:
- 分析了478名个人 (CU和CI) 的CSF.
- 测量的生物标志物:粉样β (Aβ),化陶 (pTau181),状纤维酸蛋白 (GFAP),可溶性触发受体表达在骨髓细胞2 (sTREM2) 和突触标志物 (GAP43,神经素).
- 在TRIAD和ADNI队列中验证的结果.
主要成果:
- 脊髓中GFAP水平与突触前和突触后功能障碍相关,无论认知状态或Aβ存在.
- 脑流中的sTREM2水平与突触标记有关,基于认知状态和Aβ阳性性而有不同的关系.
- CSF pTau181调解了GFAP/sTREM2与突触功能障碍之间的联系.
结论:
- 质反应,特别是星球细胞反应 (GFAP) 和微质激活 (sTREM2),与阿尔茨海默病中的突触功能障碍显著相关.
- 化陶在质标记物和突触退化之间的关系中起着调解作用.
- 这些发现阐明了AD中突触病理的特定质贡献,在多个队列中得到验证.
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