生物标志物 生物标志物
Xi Yu1, Mingzhao Hu2, Scott A Przybelski2
1Mayo Clinic, Rochester, MN, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
2型糖尿病和高血压会导致通过神经元导向分散和密度成像 (NODDI) 检测到的大脑变化. 这些微观结构的变化,特别是来自糖尿病,对认知表现和痴呆风险有适度的影响.
科学领域:
- 神经成像是一种神经成像.
- 医学科学 医学科学 医学科学
- 老年学是指老年学的学科.
背景情况:
- 慢性疾病,如2型糖尿病 (T2DM) 和高血压,与增加痴呆风险的大脑变化有关.
- 先进的扩散MRI技术,如神经元导向分散和密度成像 (NODDI),可以检测由这些条件引起的微妙组织微观结构变化.
研究的目的:
- 评估复合NODDI评分的实用性,包括血红蛋白A1c和缩血压,用于预测认知功能.
- 为了比较这些定制的NODDI得分的预测性能与传统的痴呆风险指标.
主要方法:
- 来自梅奥诊所衰老研究的1024名参与者的扩散MRI数据使用NODDI进行了分析.
- 多重线性回归确定了对T2DM (HbA1c) 和高血压 (压缩性血压) 敏感的脑区域,考虑到年龄,性别和BMI.
- 梯度增强模型评估了复合NODDI指标对认知的影响.
主要成果:
- 增加的HbA1c影响了灰质 (GM) 和白质 (WM) NODDI指标,GM ODI的早期变化.
- 压缩性血压升高主要影响了WM NODDI指标,最初的变化是特定的WM通道.
- 发现与糖尿病相关的转基因变化是认知衰退的中等显著预测因素.
结论:
- 慢性疾病,特别是T2DM,会诱导通过NODDI检测到的大脑变化.
- 这些NODDI识别的微结构变化对认知表现有适度的贡献,突出了它们在痴呆风险中的作用.
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