基于扩散MRI测量神经元微观结构和阿尔茨海默病风险之间的关联
Sasha Hakhu1, Andrew Hooyman1, Jennapher Lingo VanGilder1
1School of Biological and Health Systems Engineering, Arizona State University, 550 E Orange St., Tempe, AZ 85287, United States of America.
Experimental gerontology
|May 16, 2025
概括
高级扩散核磁共振 (dMRI) 检测到APOE-e4载体的早期阿尔茨海默病 (AD) 风险. 神经细胞密度指数 (NDI) 的变化,与标准MRI不同,显示微观结构差异,有助于早期AD检测.
科学领域:
- 神经成像是一种神经成像.
- 阿尔茨海默氏症疾病研究研究
- 生物标志物 生物标志物
背景情况:
- 早期发现阿尔茨海默病 (AD) 对有效干预至关重要.
- 传统的MRI和认知测试可能无法识别症状前的AD变化.
- 先进的扩散MRI (dMRI) 技术显示了早期神经病理学检测的潜力.
研究的目的:
- 调查神经元定向分散和密度成像 (NODDI) 在检测与阿尔茨海默病风险相关的早期微观结构性大脑变化的实用性.
- 为了比较NODDI指标与体积核磁共振和认知评估在认知不受损的老年人,分层按APOE-e4载体状态.
主要方法:
- 来自ADNI3数据集的65名认知不受损的老年人 (25名APOE-e4携带者,40名非携带者) 的分析.
- 使用的NODDI指标 (神经质密度指数 - NDI,方向分散指数 - ODI) 和体积MRI.
- 使用蒙特利尔认知评估 (MoCA) 评估认知功能,并进行统计分析,包括线性回归和具有FDR校正的t测试.
主要成果:
- 在状回环和脑内皮层中,在APOE-e4载体和非载体之间观察到NDI的显著差异.
- ODI仅在左CA1海马子场中显示了群体差异.
- 在几个大脑区域,NDI与MoCA得分相关,而体积MRI测量在不同组之间没有差异.
结论:
- NODDI指标,特别是NDI,可以识别与APOE-e4基因型相关的大脑早期的微观结构变化,这些变化无法通过标准体积MRI检测.
- 这些发现表明,NODDI作为早期AD风险评估在前症状个体的敏感工具的潜力.
关键词:
AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD AD ADD was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was was这是一个APOE-e4e4e.扩散式核磁共振成像 (MRI)诺迪尔是什么意思
