生物标志物 生物标志物
Alejandra García-Colomo1, David López-Sanz2, Martín Carrasco-Gómez3
1Universidad Complutense de Madrid, Madrid, Madrid, Spain.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
在没有认知障碍的个体中,大脑网络的变化与阿尔茨海默病的风险有关. 血 fosforylated tau231 (ptau231) 的升高与改变的网络拓相关,表明早期的大脑功能障碍.
科学领域:
- 神经科学是一个神经科学.
- 生物标志物 生物标志物
- 脑部成像 脑部成像
背景情况:
- 临床前阿尔茨海默氏症 (AD) 为早期检测和干预提供了一个关键的窗口.
- 电生理学和血生物标志物是早期AD检测的有希望的低侵入性工具.
- 这项研究研究了磁脑电图 (MEG) 网络拓和血 fosforylated tau231 (ptau231) 在不同AD风险的正常个体中.
研究的目的:
- 评估MEG衍生网络拓参数与血ptau231水平之间的关系.
- 在不同阿尔茨海默病风险级别的认知正常个体中探索这些关联.
主要方法:
- 磁脑电图 (MEG) 记录和血ptau231度分析了76名个体.
- 使用最小跨度树 (MST) 分析计算了theta,alpha和beta波段的网络拓参数 (叶分数,树层次,直径).
- 对整个样本和特定风险子组的相关性进行了检查.
主要成果:
- 较高的血ptau231水平与增加的叶片和树层次相关,并且在α和θ频段的直径减少.
- 这些关联在总样本和较高AD风险组中显著,但在较低风险组中没有显著.
结论:
- 具有高血ptau231的认知正常个体表现出改变的大脑网络拓,特点是增加集成和枢纽依赖性,特别是在α频段.
- 这些发现,包括增加的叶片分数,树层次和缩小的直径,与早期AD进展的理论模型保持一致.
- 大脑功能和组织的变化在阿尔茨海默病的早期开始.
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