孕前的细胞外囊泡通过减少CLDN5来破坏血脑屏障
Hermes Sandoval1, Belén Ibáñez1, Moisés Contreras1
1Vascular Physiology Laboratory, Department of Basic Sciences, Universidad del Bío-Bío, Chillán, Chile (H.S., B.I., M.C., F.T., E.E.-G., J.A., C.E.).
Arteriosclerosis, thrombosis, and vascular biology
|December 12, 2024
概括
孕前 (PE) 和缺氧胎盘的小细胞外囊 (sEV) 通过降低克劳丁-5 (CLDN5) 水平来破坏血脑屏障. 这些发现阐明了先兆子中脑血管并发症的机制.
科学领域:
- 产科和妇科 产科和妇科
- 神经科学是一个神经科学.
- 血管生物学 血管生物学
背景情况:
- 在孕前中严重的脑血管问题的根本原因尚不清楚.
- 孕前与中风和其他神经系统并发症的重大风险有关.
研究的目的:
- 为了检查是否小细胞外囊泡 (sEVs) 从孕前患者或胎盘下缺氧扰乱血脑屏障 (BBB).
- 确定紧结蛋白,血管内皮生长因子 (VEGF) 和KDR (VEGFR2) 在sEV介导的BBB破坏中的作用.
主要方法:
- 使用了正常怀孕,妊娠前和在normoxia或hypoxia培养的胎盘中的sEVs.
- 在实验室内使用脑内皮细胞模型和在实验室内使用注射sEVs的小鼠模型评估了BBB完整性.
主要成果:
- 产前的sEVs (sEVs-PE) 和缺氧胎盘 (sEVs-Hyp) 降低了Claudin-5 (CLDN5) 的水平.
- 在体内,sEVs-Hyp诱导了神经缺陷和BBB干扰,与CLDN5减少有关.
- sEVs-PE和sEVs-Hyp显示VEGF升高;sEVs-PE降低了KDR激活.
结论:
- sEVs-PE破坏了BBB,这种效应被sEVs-Hyp模仿,涉及降低的CLDN5和升高的VEGF.
- 显然,KDR激活不影响sEVs-Hyp.观察到的CLDN5下调.
- 这些发现有助于人们更好地了解预先怀孕症中脑血管病理生理学.
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