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系统性炎症中的内皮屏障功能障碍是由可溶性VE-cadherin介导的,它干扰VE-PTP信号传输
Juna-Lisa Knop1, Natalie Burkard1, Mahshid Danesh2
1Department of General, Visceral, Transplantation, Vascular and Paediatric Surgery (Department of Surgery I), University Hospital Wuerzburg, Oberduerrbacherstraße 6, D-97080 Wuerzburg, Germany.
iScience
|October 12, 2023
概括
可溶性血管内皮质 (VE) - 阴素碎片 (sVE- 阴素) 直接导致内皮质屏障功能障碍,这是与败血症相关的器官损伤的关键因素. 准VE-PTP/RhoA信号可能为败血症提供新的治疗策略.
科学领域:
- 血管生物学 血管生物学
- 败血症病理生理学病理生理学
- 内皮细胞功能 内皮细胞功能
背景情况:
- 内皮膜屏障的完整性对器官功能至关重要,特别是在败血症中.
- 增加可溶性血管内皮质 (VE) - 阴素碎片 (sVE-阴素) 与炎症诱导的内皮功能障碍相关.
研究的目的:
- 调查sVE-cadherin在内皮屏障功能障碍中的致病作用.
- 探索潜在的分子机制和潜在的治疗点.
主要方法:
- 在败血症患者和LPS诱导的老鼠模型中评估了sVE-cadherin水平.
- 使用复合人类sVE-cadherin (EC1-5) 在体外和体内模型.
- 研究了对内皮屏障功能,微循环流和VE-cadherin/VE-PTP/RhoA信号通路的影响.
- 测试了VE-PTP和Rho-酶抑制剂的疗效.
主要成果:
- 败血症患者的sVE-cadherin水平升高与器官功能障碍和液体复苏需求相关.
- 在体外和体内,sVE-cadherin (EC1-5) 诱导了内皮屏障的丧失,减少了微循环流.
- sVE-cadherin 破坏了 VE-cadherin 粘附和 VE-PTP/VE-cadherin 相互作用,导致 RhoA 激活.
- 抑制VE-PTP (AKB9778) 和Rho-kinase (Y27632) 的药物逆转了sVE-cadherin诱导的影响.
结论:
- 在败血症期间,sVE-cadherin在内皮屏障分解中起因作用.
- 失调的VE-PTP/RhoA信号传递是sVE-cadherin有害作用的关键机制.
- 针对VE-PTP/RhoA信号传输,为败血症引起的血管功能障碍提供了潜在的治疗途径.
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