海马不对称性捕捉了非粉样蛋白相关的记忆衰退和临床进展风险
medRxiv : the preprint server for health sciences
|January 16, 2026
概括
海马体积和不对称性为阿尔茨海默病神经退行症提供了独特的见解. 较大的不对称性预测记忆力下降和痴呆风险,特别是在没有粉样蛋白病理的个体中.
科学领域:
- 神经成像是一种神经成像.
- 神经退行发生神经退行.
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 海马缩是阿尔茨海默病 (AD) 神经退行的一个关键标志物.
- 仅仅海马体积可能无法完全捕捉认知衰退的异质性.
- 半球海马不对称的预后价值尚不清楚.
研究的目的:
- 调查总海马体体积和半球不对称性对认知衰退和临床进展的预后价值.
- 确定海马非对称性是否为阿尔茨海默病的总体体积提供了补充信息.
主要方法:
- 研究了来自阿尔茨海默病神经成像计划 (ADNI) 的1,142名没有痴呆症的参与者.
- 分析了基线结构性MRI,脑脊液生物标志物 (Aβ42,p-tau-181) 和纵向认知数据.
- 模拟海马总体体积和半球不对称性,评估与认知表现,衰退和痴呆风险的关联.
主要成果:
- 较大的海马总体体积与更好的基线认知和所有领域的较慢衰退相关.
- 更大的海马不对称性与更差的基线记忆和更快的记忆衰退有关.
- 海马的不对称性预测了粉样蛋白阴性个体的痴呆风险,而较小的总体积预测了所有组的风险.
结论:
- 海马总体积和不对称性反映了神经退行症的不同方面.
- 海马不对称性为记忆力下降和临床进展提供了额外的预后信息,特别是在粉样蛋白阴性个体中.
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