在应对流量控制的Kindlin-2相分离 血管稳定性
Nina Ma1,2, Fangfang Wu1,2, Jiayu Liu3
1Department of Pharmacology, Tianjin Key Laboratory of Inflammation Biology, State Key Laboratory of Experimental Hematology, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics (N.M., F.W., Z.W., L.W., Y.L., X.D., X.W.), School of Basic Medical Sciences, Tianjin Medical University, China.
Circulation research
|November 4, 2024
概括
机械力量改变Kindlin-2的氨酸甲基化,影响其液体-液体相分离 (LLPS) 和内皮细胞完整性. 针对这一过程提供了治疗动脉样硬化和血管疾病的新策略.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 血管生物学 血管生物学
背景情况:
- 内皮膜屏障功能是由剪切应力调节的,以动脉动脉保护和动脉动脉的模式影响内皮细胞 (EC) 完整性.
- 通过不同的血流模式调节EC完整性的精确机制仍然不完全理解.
- Kindlin-2是一种焦点粘附和粘附结蛋白,对EC完整性和血管稳定性至关重要.
研究的目的:
- 研究Kindlin-2在不同剪切应力条件下调节内皮细胞完整性的作用.
- 阐明机械力影响Kindlin-2功能的分子机制.
- 探索Kindlin-2在动脉动脉生成中的参与.
主要方法:
- 使用了EC特定的Kindlin-2淘汰赛小鼠模型和动脉样硬化模型 (ApoE淘汰赛).
- 在培养的EC上应用了不同的剪切应力模式 (脉动和振荡).
- 采用活细胞成像,生物化学分析 (共免疫沉,质谱) 和生物物理技术 (OptoDroplet,FRAP) 来研究Kindlin-2局部化,液态相分离 (LLPS) 和翻译后修改.
主要成果:
- kindlin-2的定位和功能是由剪切应力模式调节的.
- 在EC中Kindlin-2缺陷导致小鼠血管透性增加和动脉样硬化恶化.
- 振荡剪切会通过PRMT5诱导Kindlin-2的氨酸甲基化,抑制其LLPS,损害焦点粘附和结点成熟.
- 药理上抑制阿金甲基化减少了EC激活和动脉样硬化斑块的形成.
结论:
- 机械力量通过诱导Kindlin-2的氨酸甲基化来调节血管稳定性,这会影响其LLPS.
- 肯德林-2的氨酸甲基化是流量依赖EC完整性的关键调解者.
- 针对Kindlin-2氨酸甲基化,为血管疾病和动脉样硬化提供了一个潜在的基于血液动力学的治疗策略.
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