基于体内路径的整合选择性地预测了阿尔茨海默病中年风险
Coco Newton1, Marianna Pope1,2, Catarina Rua3
1Department of Psychiatry, University of Cambridge, Cambridge, UK.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|February 29, 2024
概括
中年成年人的路径整合 (PI) 障碍可能是阿尔茨海默病 (AD) 风险的早期指标. 这种空间导航变化在其他认知下降之前发生,表明潜在的临床前AD过渡.
科学领域:
- 神经科学是一个神经科学.
- 阿尔茨海默氏症疾病研究研究
- 认知科学 认知科学
背景情况:
- 内皮质 (EC) 对于空间导航至关重要,是阿尔茨海默病 (AD) 影响的第一个大脑区域.
- 在EC内部的网格细胞对于基于路径集成 (PI) 的空间行为至关重要.
- 这些细胞的功能障碍与AD早期的神经退行有关.
研究的目的:
- 调查路径整合 (PI) 障碍是否是患AD风险较高的成年人最早的行为变化.
- 为了将PI能力与遗传和生理AD风险因素相关联.
- 检查PI与其他认知领域以及风险人群中的脑成像之间的关系.
主要方法:
- 基于虚拟现实 (VR) 的PI能力在100名无症状中年成人中与AD风险不同进行了比较.
- 根据遗传和生理AD风险因素分层参与者.
- 使用7T磁力共振成像来评估与行为数据相关的大脑结构和功能.
主要成果:
- 发现中年PI损伤可以预测遗传和生理AD风险.
- 没有观察到与AD风险相关的情节性记忆或其他空间行为显著受损.
- 改变的PI与后中腔内皮层功能性MRI信号的变化有关.
结论:
- 改变PI可能作为阿尔茨海默病的临床前生物标志物.
- PI损伤可能代表了过渡到AD的最早可检测的行为转变.
- 这一发现先于其他认知领域的缺陷,突出了PI对早期AD相关变化的敏感性.
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