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在白质老化中的微观结构提前检测到的 perfusion 的变化

Tyler D Robinson¹, Yutong L Sun², Paul T H Chang²

¹Rotman Research Institute, 3560 Bathurst Street Baycrest, Toronto, Ontario, M6A 2E1, Canada. trobinson@research.baycrest.org.

|July 22, 2025

概括

脑血流量下降和白质 (WM) 动脉过渡时间延长与大脑衰老有关. 动脉过渡时间的变化先于微观结构损伤,这表明它.

科学领域:

神经科学是一个神经科学.
衰老研究研究衰老研究
血管生物学血管生物学

背景情况:

大脑输液是大脑健康干预的关键目标.
白质 (WM) 衰老与大脑输液之间的关系尚未完全理解.
肌痛超强度与皮层 perfusion 的下降有关.

研究的目的:

调查WM微结构完整性和 perfusion 之间的关联.
为了确定区域性WM低流是否先于WM完整性的恶化.
为了探索WM perfusion-microstructure关系中的性别差异.

主要方法:

使用的人类连接体老化项目 (HCP-A) 数据.
检查了WM微结构 (FA,MD,AD,RD) 和 perfusion (CBF,ATT) 之间的通道智能关联.
分析了十个主要的双边WM轨道.

主要成果:

在所有通道中都发现了WM输液和微观结构之间的显著相关性.
这些相关性的驱动因素因路径和性别而异,女性显示出更多的微观结构变化.
动脉过渡时间的与年龄相关的变化比其他参数更早达到顶峰,在几条通道的微观结构和CBF变化之前.

结论:

提供了支持WM退化的血管假设的证据.
表明动脉过渡时间是大脑衰老的潜在早期标志物.
强调性别分析在衰老研究中的重要性.

关键词:

衰老的衰老衰老的衰老扩散扩散是一种扩散.微观结构的微观结构 perfusion 输液是一种输液.曲谱学曲谱学曲谱学曲谱学白质是白质的组成部分.

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