在默认模式网络区域的皮质形态变化作为与粉样蛋白和矿沉积相关的认知衰退的预测因素
Arianna Menardi1,2, Ceren Saglam3, Beatrice La Rocca3
1Department of Neuroscience, University of Padova, 35128 Padova, Italy.
Brain communications
|September 11, 2025
概括
阿尔茨海默病生物标志物:与粉样蛋白和蛋白水平相关的默认模式网络 (DMN) 结构完整性预测认知能力下降. 保存的DMN结构可以防止阿尔茨海默病早期的记忆丧失.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 生物标志物 生物标志物
背景情况:
- 阿尔茨海默病 (AD) 诊断依赖于粉样蛋白,蛋白和神经退行性标记物.
- 默认模式网络 (DMN) 容易受到AD病理的影响,因此其结构变化成为潜在的早期生物标志物.
- 了解与AD病理学相关的DMN结构变化对于早期检测和干预至关重要.
研究的目的:
- 为了研究DMN结构完整性和阿尔茨海默病的认知表现之间的关系.
- 为了确定DMN的结构性测量是否可以在两年内预测记忆力下降.
- 探索粉样蛋白和病理如何影响DMN结构及其与认知的关联.
主要方法:
- 对来自阿尔茨海默氏病神经成像倡议的279名参与者的纵向横截面研究.
- 提取了DMN区域的结构测量 (深,旋转,皮质厚度).
- 使用多重线性回归来评估DMN结构对记忆表现的预测能力,控制认知得分,粉样蛋白和水平.
主要成果:
- 根据粉样蛋白和状况观察到明显的DMN改变模式.
- 一致的粉样蛋白/状况 (阳性或阴性) 显示了DMN结构的保存,与更好的认知表现和对衰退的保护有关.
- 不一致的粉样蛋白/蛋白状态 (仅对一种蛋白质病变呈阳性) 显示DMN结构和认知之间存在负相关性,这表明存在不匹配.
结论:
- DMN的结构完整性与阿尔茨海默病的认知表现和疾病进展有关.
- 粉样蛋白,蛋白和DMN结构之间的相互作用影响认知结果.
- 这些发现通过突出蛋白质病变与结构不匹配在认知衰退中的作用来澄清AD研究中的异质结果.
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