丢失的ROR2 氨酸激酶受体是通过不适当的整体蛋白β1激活PAH中内皮功能障碍相关的
Ankita Mitra1, Stuti Agarwal1, Ananya Chakraborty1
1Division of Pulmonary and Critical Care (A.M., S.A., A.C., A.R., A.B., A.P., N.A., P.C., A.J., J.A.M.M., E.S.G., V.A.d.J.P.), Stanford University, Palo Alto, CA.
Hypertension (Dallas, Tex. : 1979)
|February 4, 2026
概括
受体氨酸激酶类孤儿受体2 (ROR2) 的丧失,通过损害内皮屏障完整性,使肺动脉高血压恶化. 恢复ROR2功能可能为PAH提供新的治疗策略.
科学领域:
- 心血管研究研究心血管研究
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
背景情况:
- 内皮功能障碍是肺动脉高血压 (PAH) 的标志.
- 以前的研究将减少的Wnt7a转录水平与降低的PAH血管生成联系起来.
- Wnt7a的表达与通过受体氨酸激酶类孤儿受体2 (ROR2) 的尖端形成相关.
研究的目的:
- 研究ROR2激活在肺微血管内皮细胞 (PMVECs) 中的作用.
- 为了确定ROR2是否促进血管生成和内皮屏障的建立.
- 测试ROR2损失导致PAH的假设.
主要方法:
- 研究了内皮特异性ROR2淘汰 (ROR2 ECKO) 和野外型小鼠在正常和缺氧条件下.
- 使用心声回声学,血液动力学和肺形态学.
- 使用ROR2siRNA/构造和转录组分析对PMVEC进行了功能和分子研究.
主要成果:
- ROR2 ECKO小鼠表现出恶化的肺高血压和血管重塑.
- 单细胞RNA测序揭示了ROR2 ECKO肺中的失调屏障形成和血管生成.
- 在PAH PMVEC中ROR2缺乏增加了粘附和透性,在焦点粘附中ROR2与整蛋白β1 (ITGB1) 相互作用.
结论:
- 通过保持内皮屏障的完整性和促进整体蛋白回收利用,ROR2对于肺血管生成至关重要.
- 由Rab12介导的ROR2-ITGB1交叉声是关键通路之一.
- ROR2恢复为PAH提供了一个潜在的治疗途径.
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