液体-液体相分离的EphB4驱动通过YAP激活的肺高血压
Jia-Yu Liu1, Jing Chen1, Qin-Ye Chen1
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou 350122, China.
Cell reports
|February 14, 2026
概括
肺高血压 (PH) 涉及血管硬化. 研究人员发现Eph受体B4 (EphB4) 通过促进细胞生长来驱动这种作用,为PH提供了一个新的治疗点.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 心血管研究研究心血管研究
背景情况:
- 血管细胞外矩阵硬化是肺高血压 (PH) 的关键因素.
- 将矩阵硬化与PH中的细胞功能障碍联系在一起的精确机制尚未完全理解.
- 肺动脉光滑肌细胞 (PASMCs) 在PH病变发生过程中发挥着关键作用.
研究的目的:
- 在PASMC中识别度诱导的细胞反应的关键调解者.
- 阐明Eph受体B4 (EphB4) 在肺高血压发展中的作用.
- 探索EphB4相分离作为PH的潜在治疗点.
主要方法:
- 在PH模型中研究了EphB4表达.
- 在体外和体外模型中使用了矩阵硬化和PH的模型.
- 分析了EphB4内在无序区域 (IDR) 在液态液相分离 (LLPS) 中的作用.
- 开发并测试了一种通过纳米颗粒传递的以EphB4 IDR为目标的逆向.
主要成果:
- 在老鼠中,EphB4在PH上调,其缺乏改善了PH.
- 矩阵硬化诱导了EphB4 LLPS,隔离了YAP调节蛋白 (ANXA2,YWHA).
- 这一过程破坏了YAP的保留,促进了核转移和PASMC扩散.
- 针对EPHB4的IDR用一种来抑制LLPS和减弱PH的进展.
结论:
- 在PH中,EphB4充当度诱导的PASMC增殖的关键调解者.
- 以B4驱动的LLPS和随后的YAP激活在PH中形成了一个新的病理轴.
- 抑制EphB4相分离是一种有前途的肺高血压治疗策略.
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