内素不连贯运动作为在老鼠大脑中 perfused 血管密度的替代标志物
Bram Callewaert1,2, Willy Gsell2, Marleen Lox1
1Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology (CMVB), KU Leuven, Leuven, Belgium.
NMR in biomedicine
|April 1, 2024
概括
输入素不连贯运动 (IVIM) MRI 可以通过将扩散测量与血液流量相关,来评估大脑血管密度. 这项研究发现IVIM MRI与血管密度相关,甚至与血脑屏障破坏有关.
科学领域:
- 神经成像是一种神经成像.
- 血管生物学 血管生物学
- 生物医学工程 生物医学工程
背景情况:
- 输入素不连贯运动 (IVIM) MRI用于组织输液评估.
- IVIM测量与大脑血管密度之间的关系尚不清楚.
- 调查IVIM MRI在非侵入性测量血管变化的潜力至关重要.
研究的目的:
- 探索IVIM MRI作为评估大脑血管密度的非侵入性方法.
- 为了将IVIM参数 (D*和f) 与大鼠大脑区域的定量血管密度相关联.
- 评估血脑屏障 (BBB) 破坏对IVIM测量及其与血管密度的关系的影响.
主要方法:
- 量化免疫组织化学被用来测量大鼠大脑特定区域的血管密度.
- 在健康的Wistar大鼠和患有并发症的ZSF1肥胖大鼠身上进行了IVIM MRI.
- 统计分析将IVIM参数 (D*,f) 与血管密度测量相关联.
主要成果:
- 在伪扩散系数 (D*) 和脑血管密度 (p < 0.05,β = 0.24) 之间发现了显著的正相关性.
- 在ZSF1肥胖大鼠中,BBB中断导致血管透率增加,但不改变扩散性.
- 与健康大鼠相比,IVIM测量和脑血管密度之间的关系在并发症模型中保持一致.
结论:
- IVIM MRI显示出作为评估大脑血管密度的非侵入性工具的前景.
- 与输血相关的IVIM参数,特别是D*,反映了区域血管密度.
- 在IVIM MRI检测到组织扩散性的显著变化之前,BBB完整性受到损害.
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