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儿童时期大脑铁力学和血脑屏障功能之间的关系:一个定量磁共振成像研究

Yuto Uchida^1,2, Hirohito Kan³, Gen Furukawa⁴

¹Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, 208 Traylor Building, 720 Rutland Avenue, Baltimore, MD, 21205, USA. yuchida2@jhmi.edu.

Fluids and barriers of the CNS

|August 17, 2023

概括

这项研究揭示了儿童大脑铁水平和血脑屏障功能如何发展. 定量MRI显示,在早期大脑发育期间,铁积累和BBB透性之间存在联系.

科学领域:

神经成像是一种神经成像.
发育神经科学的发展神经科学.
生物物理学的生物物理.

背景情况:

血脑屏障 (BBB) 在发育过程中对大脑铁平衡至关重要.
对于儿童的BBB功能和脑铁动态的定量成像还不太清楚.
这项研究调查了儿童发育中的大脑铁和BBB功能之间的关系.

研究的目的:

确定大脑铁力学与儿童BBB功能之间的关系.
使用定量MRI描绘生理系统沿着发育轨迹.
分析发育中的大脑中的区域大脑铁沉积和BBB功能.

主要方法:

一项前性研究包括78名2岁至180个月的儿童,接受了3.0-T大脑MRI.
定量敏感性测绘 (QSM) 测量了铁沉积量.
扩散准备的伪连续动脉旋转标签 (DP-pCASL) 测量了BBB功能.
基于Atlas的分析调查了发育轨迹和关系.

主要成果:

在生命的前两年观察到大脑磁感应能力的快速进展.
西格曲线模型适用于铁积累 (Δsusceptibility) 和BBB水交换速率 (k_w) 分于脑血流之间的关系.
西格形模型的曲点在深灰质核之间有所不同,反映了区域铁异质性.

结论:

综合定量MRI (QSM和DP-pCASL) 有效地证明了小儿大脑中大脑铁动态和BBB功能之间的关系.
这些发现突出了儿童时期大脑铁和BBB功能的发育轨迹.
铁积累的区域差异与BBB的透性特征相关.

关键词:

血脑屏障血脑屏障血脑屏障血脑屏障用扩散制备的伪连续动脉旋转标签.磁共振成像技术磁共振成像技术儿科大脑的儿童大脑定量敏感性映射测绘定量敏感性映射测绘

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