基础科学和病原发生学
Wanyong Shin1, James B Leverenz1,2, Mark J Lowe1
1Cleveland Clinic, Cleveland, OH, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
阿尔茨海默病 (AD) 与特定大脑区域的血脑屏障 (BBB) 透性增加有关,与认知能力下降的严重程度相关. 这些BBB变化在AD痴呆症中比轻度认知障碍 (MCI) 更明显.
科学领域:
- 神经成像是一种神经成像.
- 神经科学是一个神经科学.
- 生物标志物 生物标志物
背景情况:
- 阿尔茨海默病 (AD) 病理生理学涉及炎症和神经血管功能障碍.
- 了解血脑屏障 (BBB) 的破坏对于AD研究至关重要.
- 在AD的不同临床阶段,特定于大脑区域的BBB变化需要进一步的表征.
研究的目的:
- 为了研究大脑区域特定的BBB透性在AD的不同临床阶段的变化.
- 为了比较AD痴呆症,轻度认知障碍 (MCI) 和健康对照 (HC) 中的BBB透性.
主要方法:
- 在3T时使用动态对比增强 (DCE) MRI 来评估BBB透性 (Ktrans).
- 41名参与者 (6人患有AD痴呆症,16人患有MCI,19人患有HC) 使用帕特拉克模型进行了分析.
- 在皮下灰质和叶状区域计算Ktrans值.
主要成果:
- 与HC患者相比,在阿尔茨海默氏症患者的质体,尾状体,质体,杏仁体,海马体和部区域观察到显著更高的Ktrans值 (表明BBB透性增加).
- 在Ktrans值和蒙特利尔认知评估 (MOCA) 分数之间发现了显著的负相关性,这表明BBB透性和认知功能之间存在联系.
结论:
- 在特定的皮质下和皮质灰质区域增加的BBB透性在AD痴呆症中比MCI更为突出.
- 这些BBB变化在AD患者和HC患者之间显著不同.
- BBB中断的程度线性地跟踪了AD认知衰退的严重程度.
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