内膜前1诱导了中枢神经系统的血脑屏障障碍
Sara González-Hernández1, Ryo Sato1, Yuya Sato1,2
1Laboratory of Stem Cell and Neuro-Vascular Biology, Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
bioRxiv : the preprint server for biology
|January 13, 2025
概括
普罗斯佩罗Homeobox 1 (PROX1) 诱导大脑中异常的血管发育,破坏了血脑屏障 (BBB). 这一发现为中枢神经系统的淋巴发育和BBB完整性提供了新的见解.
科学领域:
- 神经科学是一个神经科学.
- 血管生物学 血管生物学
- 细胞生物学 细胞生物学
背景情况:
- 中枢神经系统 (CNS) 的副体传统上被认为没有淋巴血管系统.
- 淋巴内皮细胞 (LEC) 标记物的宫外表达,如普罗斯佩罗荷美1 (PROX1),在脑瘤和形中观察到.
- 这表明LEC标志物在脑血管异常和血脑屏障 (BBB) 功能障碍中可能发挥作用.
研究的目的:
- 调查子宫外LEC特性在BBB中断中的作用.
- 探索内皮PROX1过度表达对中枢神经系统血管发育和BBB完整性的影响.
主要方法:
- 在小鼠中利用了内皮细胞特异的Prox1过度表达突变.
- 在BBB发育和成熟的胚胎和产后阶段诱导的Prox1过度表达.
- 分析了血管形,血管泄漏和BBB破坏.
- 评估了BBB相关基因的表达,包括β-catenin和Claudin-5.
主要成果:
- 胚胎诱导内皮PROX1过度表达导致中枢神经系统血管中的混合血淋巴表型.
- 产后Prox1过度表达并没有产生相同的杂交表型,但仍然导致BBB破坏.
- 宫外的Prox1表达导致了显著的血管形和增强的泄漏,破坏了BBB.
- 发现PROX1降低了关键的BBB相关基因的调节,损害了BBB完整性和Wnt/ß-catenin信号传递.
结论:
- 内皮PROX1表达可以诱导中枢神经系统异常的血管表型和BBB破坏.
- PROX1负面调节了必不可少的BBB组件,影响了BBB的开发和维护.
- 这些发现揭示了某些神经疾病中BBB异常背后的机制.
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