内皮细胞的sphingosine 1-phosphate受体1抑制VE-cadherin裂变,并减轻实验性炎症性关节炎
Nathalie Burg1, Ryan Malpass1, Linda Alex1
1Hospital for Special Surgery, New York, New York, USA.
JCI insight
|June 10, 2024
概括
内皮细胞的sphingosine 1-phosphate受体1 (S1PR1) 在风湿性关节炎中保持血管屏障的完整性. 破坏EC S1PR1信号增加了血管泄漏和关节损伤,突出了S1PR1作为治疗点.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
背景情况:
- 在类风湿性关节炎中,炎症媒介通过内皮细胞 (EC) 间隙进入关节.
- 内皮细胞S1PR1对于维持血管屏障功能至关重要.
- 对于ECs和S1PR1在关节炎相关关节损伤中的作用尚不清楚.
研究的目的:
- 研究血管完整性和EC S1PR1信号对血清诱导性关节炎 (SIA) 关节损伤的贡献.
- 确定S1PR1调节EC连接点完整性的机制.
主要方法:
- 使用具有EC特异性S1PR1删除或过度表达的小鼠.
- 药理学S1PR1阻断和激动剂治疗进行.
- 评估了VE-cadherin裂变和ADAM10的作用.
- 在SIA中量化了血管泄漏和关节损伤.
主要成果:
- 删除或阻断EC S1PR1导致血管泄漏和SIA恶化.
- 过度表达EC S1PR1或激动剂治疗改善了SIA.
- 通过ADAM10调解的S1PR1阻断增加了VE-cadherin的分泌.
- 稳定VE-cadherin可以防止血管泄漏和SIA.
- 类风湿性关节炎患者的循环S1P和微血管S1PR1.1减少.
结论:
- 在炎症性关节炎中,EC S1PR1信号对于维持血管屏障功能至关重要.
- 通过ADAM10,S1PR1限制了VE-cadherin的分泌,从而防止了血管的透性.
- S1P/S1PR1轴的失调有助于风湿性关节炎中的血管脆弱性.
- 针对EC S1PR1轴为炎症性关节炎提供了一个潜在的治疗策略.
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