生物标志物 生物标志物
Ondrej Lerch1, David Kala1, Zuzana Nedelska1
1Charles University, Second Faculty of Medicine and Motol University Hospital, Prague, Czech Republic.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
血脑屏障 (BBB) 透性在阿尔茨海默病 (AD) 患者的基础前脑区域减少. 这一发现表明,BBB功能障碍可能会导致这个特定的大脑区域的早期AD病理.
科学领域:
- 神经科学是一个神经科学.
- 放射学 放射学是指放射学
- 生物标志物 生物标志物
背景情况:
- 血脑屏障 (BBB) 功能障碍与阿尔茨海默病 (AD) 病原发生有关.
- 动态对比增强磁共振成像 (DCE-MRI) 使用K-trans.等指标量化BBB分解.
- 早期阿尔茨海默病受影响的区域包括海马体,内腔皮层 (EC) 和基底前脑 (BF).
研究的目的:
- 通过使用DCE-MRI在早期AD中调查BBB功能障碍.
- 为了比较认知正常 (CU) 个体和AD患者之间的海马,EC和BF中的BBB透性.
- 评估BBB透性和AD生物标志物之间的关系.
主要方法:
- 在43名参与者 (22个CU,21个AD) 上进行了DCE-MRI.
- 使用帕特拉克算法生成K-trans地图.
- 提取了海马,EC和BF的区域K-trans值,并使用ANCOVA进行分析.
主要成果:
- 与CU个体相比,AD患者在总BF区域的K-trans平均值明显较低 (p=0.002).
- 在BF中,基底核Meynerti的特定子区域在AD组中也表现出减少的K-trans.
- 两组之间在海马体或EC中没有发现BBB透性的显著差异.
结论:
- 这项研究显示,在患有轻度认知障碍或AD痴呆症的患者中,BBB透率在基底前脑内有区域性降低.
- 在BF中这种局部BBB功能障碍可能是导致阿尔茨海默病早期病理变化的因素.
- 需要进一步的研究来探索BF特异性BBB改变在AD的确切机制和影响.
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