在非痴呆症的老年人中,脑血过渡时间,β-粉样蛋白病理和认知衰退之间的关联
Yao Zhang1, Xiao Luo1, Hui Hong1
1Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
概括
脑血管血液动力学障碍,通过长时间的血液传输时间表明,与阿尔茨海默病 (AD) 病理学和认知能力下降有关. 早期的血管功能障碍可能会在阿尔茨海默氏症中与粉样β积累发生前期或相互作用.
科学领域:
- 神经成像是一种神经成像.
- 脑血管健康 脑血管健康
- 阿尔茨海默病病理生理病理学
背景情况:
- 脑血管血动力学障碍在阿尔茨海默病 (AD) 中的作用尚未完全理解.
- 血氧水平依赖 (BOLD) 信号为大脑功能和血管动力学提供了洞察力.
研究的目的:
- 为了研究大脑血液传输时间,粉样β (Aβ) 病理和非痴呆个体的认知功能之间的关联.
- 在早期AD病理学的背景下,探索血管因素和Aβ负担之间的相互作用.
主要方法:
- 利用BOLD信号的时间转移分析来得出三个传输指标:LagICA-SSS,LagICA-global,和Lagglobal-SSS.
- 分析了阿尔茨海默病神经成像计划中131名非痴呆症参与者的数据.
- 采用横截面和纵向分析来检查运输指标,Aβ负担和认知之间的关系.
主要成果:
- 长期的ICA-global和ICA-SSS基线Lag与更高的Aβ负担相关,Aβ介导认知效应.
- 纵向分析显示,长时间的Lag全球-SSS和LagICA-SSS预测了Aβ积累的增加.
- 延长过境时间 (ICA-global, Lagglobal-SSS) 和Aβ负担之间的协同相互作用与加速的认知衰退有关.
结论:
- 血液过渡时间延长,包括动脉和静脉测量,可能意味着AD过程中的早期脑血管功能障碍.
- 血管风险,反映在运输时间,与Aβ积累和认知衰退有关,可能是通过协同相互作用.
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