在神经炎症期间,VEGF-A介导的静脉内皮细胞增殖导致新血管生成
Sanjid Shahriar1,2, Saptarshi Biswas3, Kaitao Zhao3
1Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY, USA.
Nature neuroscience
|September 10, 2024
概括
静脉内皮细胞在多发性硬化症 (MS) 等脱髓化疾病中驱动新的血管生长. 向VEGF-A可以减少这种生长,但不能修复血脑屏障损伤.
科学领域:
- 神经免疫学 神经免疫学
- 血管生物学 血管生物学
- 脱线性疾病 脱线性疾病
背景情况:
- 多发性硬化症 (MS) 和实验性自身免疫脑膜炎 (EAE) 具有漏血血管和血脑屏障 (BBB) 损伤的特点.
- 在这些病变中,驱动新血管化的特定内皮细胞类型和信号通路在很大程度上是未知的.
研究的目的:
- 为了识别内皮细胞亚型和信号通路参与新血管化在脱髓化病变.
- 调查静脉内皮细胞和VEGF-A信号在MS和EAE病变发生过程中的作用.
主要方法:
- 在EAE的小鼠模型中单细胞转录概况.
- 在EAE小鼠体内验证研究.
- 对人类多发性硬化病变样本的分析.
- 在EAE小鼠中用VEGF-A阻断抗体进行治疗.
主要成果:
- 在EAE病变中的静脉内皮细胞表现出新血管生成基因特征和增加的增殖,导致静脉扩大和更大的静脉覆盖.
- 这些变化与高调节的血管内皮生长因子A (VEGF-A) 信号相关.
- 在人类多发性硬化病变中,新血管原生标志物也升高.
- 阻断VEGF-A降低了新血管生成特征和血管增殖,但没有恢复BBB功能或改善EAE病理.
结论:
- 静脉内皮细胞是神经炎症疾病中新血管生成的关键贡献者.
- 虽然VEGF-A信号驱动这种新血管生成,但仅仅阻止它不足以修复BBB或治疗EAE.
- 需要进一步的研究来了解MS中BBB修复的复杂机制.
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