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通过11.7TMR T1映射和微血管病理变化评估高血压CSVD中的血脑屏障损伤

Zhilan Tu¹, Yan Xi², Yuwen Zhang³

¹Department of Neurology, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, Shanghai, 201399, China.

Metabolic brain disease

|December 16, 2024

概括

大鼠的高血压大脑小血管疾病 (CSVD) 损害记忆力,并导致血脑屏障 (BBB) 泄漏,特别是在海马体. 这项研究量化了CSVD大鼠模型中的BBB干扰和白质损伤.

科学领域:

神经科学是一个神经科学.
心血管研究研究心血管研究
医疗成像医学成像

背景情况:

大脑小血管疾病 (CSVD) 是中风和认知衰退的主要原因.
高血压是CSVD的主要风险因素,导致血脑屏障 (BBB) 的破坏.
目前在CSVD中评估BBB完整性的方法有限.

研究的目的:

在使用11.7T MR T1映射的高血压CSVD大鼠模型中量化血脑屏障 (BBB) 的破坏.
调查与CSVD相关的白质病变和微血管病变.
为了将BBB完整性与认知功能和病理变化相关联.

主要方法:

使用自发高血压大鼠 (SHR) 作为高血压CSVD模型和Wistar-Kyoto大鼠 (WKY) 作为对照.
使用莫里斯水迷宫测试评估认知功能.
通过使用ITK-SNAP软件进行11.7T MR T1映射和海马体积的量化BBB完整性.
进行了免疫组织化学,以评估髓完整性 (MBP),血管透性 (VEGFR2) 和微血管密度 (CD34).

主要成果:

SHR大鼠表现出记忆功能下降和显著的BBB泄漏,T1值在海马体中下降最大.
病理学分析显示了广泛的小血管变化,白质中的髓基蛋白 (MBP) 减少,SHR中的VEGFR2和CD34表达增加.
在高血压CSVD模型中观察到海马缩和海马体积下降.

结论:

高血压的CSVD导致认知缺陷和区域BBB泄漏,特别影响海马体.
在这个CSVD模型中,骨髓质完整性丧失,血管透性增加和微血管病变有助于BBB功能障碍.
11.7T MR T1映射是量化CSVD研究中BBB干扰的一个有价值的工具.

关键词:

11.7T MR 11.7T MR 11.7T MR 11.7T MR 11.7T MR 11.7T MR 11.7T MR 11.7T MR 11.7T MR 血液大脑屏障血液大脑屏障大脑小血管疾病大脑小血管疾病河马缩症河马缩症河马缩症 T1映射 T1映射 T1映射 T1映射

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