血管健康,大脑硬和全球认知功能之间的关联
KowsalyaDevi Pavuluri1, John Huston1, Richard L Ehman1
1Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA.
Brain communications
|March 20, 2024
概括
通过磁共振弹性学测量的大脑度,由血管大脑损伤和心血管风险因素减少. 这种大脑硬是关键的调解者,将血管损伤与认知障碍联系起来.
科学领域:
- 神经成像是一种神经成像.
- 血管神经学 血管神经学
- 生物标志物发现发现
背景情况:
- 血管大脑损伤 (VBI) 通过连接性损失和微观结构损伤导致认知障碍.
- 在VBI中,组织微观结构的改变发生在早期,在缩之前.
- 磁共振弹性成像 (MRE) 非侵入性地评估大脑的机械特性,反映微观结构完整性.
研究的目的:
- 评估大脑度作为VBI的生物标志物.
- 研究大脑硬在调解血管功能障碍对认知障碍影响中的作用.
主要方法:
- 从梅奥诊所老龄化研究中对75名参与者的回顾性研究.
- 使用MRE和T1/T2加权序列的3T MRI进行脑部成像.
- 对MRE数据的Voxelwise分析,部分相关性和调解分析,以评估大脑度,血管生物标志物 (白质强度过高,心脏代谢状况) 和认知之间的关联.
主要成果:
- 白质超强度 (WMH) 与大脑度有负相关性,特别是在周周结节区域.
- 心血管风险因素 (心脏代谢状况) 也显示与大脑硬有负面关联.
- 大脑硬与全球认知正相关,独立于粉样蛋白负载.
- 大脑度显著介导了WMH和心脏代谢状况与认知功能之间的关系.
结论:
- 大脑组织的机械变化,反映在减少度,与认知功能障碍和VBI有关.
- 全球大脑硬是血管疾病标志物和认知表现之间的重要调解者.
- 基于MRE的机械评估为血管健康和认知之间的关系提供了宝贵的见解.
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