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通过β-catenin激活,Wnt7a可以降低脑内皮屏障功能
Narek Manukjan1,2,3, Steven Chau1, Florian Caiment4
1Department of Pharmacology and Toxicology, Maastricht University, 50 Universiteitssingel, P.O. Box 616, Maastricht, 6200 MD, The Netherlands.
Molecular neurobiology
|December 26, 2023
概括
Wnt7a信号通过降低通过β-catenin的Claudin-5表达而降低内皮屏障完整性,影响血脑屏障的形成. HIF1α信号传递在血管生成中起作用,但不是紧密结节的调节.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 血脑屏障 (BBB) 对于保护大脑至关重要,由内皮细胞与特定的紧密结合蛋白 (如Claudin-5和Occludin) 维持.
- Wnt/β-catenin信号通路影响紧结蛋白的表达和BBB的透性.
- BBB的功能障碍与各种神经疾病有关.
研究的目的:
- 为了研究Wnt7a介导的β-catenin信号传递对内皮屏障完整性的体外效应.
- 探索Wnt/HIF1α信号在内皮屏障功能中的作用.
- 了解Wnt信号传输对BBB的影响背后的分子机制.
主要方法:
- 主要小鼠大脑内皮细胞 (bEnd.3) 用Wnt7a或XAV939 (Wnt/β-catenin抑制剂) 进行治疗.
- 使用Hif1α siRNA调节HIF1α信号.
- 我们分析了β-catenin,Claudin-5,Occludin,HIF1α和Vegfa的表达.
- 评估了内皮膜屏障的完整性.
主要成果:
- 刺激Wnt7a激活了β-catenin的核转位,而XAV939则抑制了这种转位.
- 通过β-catenin调解,Wnt7a降低了Claudin-5的表达和内皮屏障的形成.
- 通过β-catenin,Wnt7a增加了HIF1α和Vegfa的表达.
- HIF1α信号没有直接调节Claudin-5或Occludin的表达.
结论:
- 通过β-catenin核转移刺激Wnt7a,减少紧密结蛋白并破坏内皮壁垒的形成.
- 这种Wnt7a效应可能对内皮细胞增殖和血管生成很重要.
- 虽然HIF1α不调节紧张的结节,但可能会导致大脑血管新生和涉及Wnt/HIF1α信号的疾病病原体.
关键词:
这是BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB贝塔-catenin 的使用情况.氧气过低是因为缺氧.在这里,Teer Teer.血管痴呆症是一种精神疾病.cSVD 在线视频相关概念视频
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