干白素-1受体类型-1在干扰的流动诱导的内皮介质激活中
Evan Kidder1, Meleah Pea1, Siyuan Cheng2,3
1Department of Internal Medicine-Division of Cardiology, Louisiana State University Health Sciences Center at Shreveport, Shreveport, LA, United States.
Frontiers in cardiovascular medicine
|August 4, 2023
概括
在动脉样硬化中,受损的血液流动会触发内皮细胞到介质细胞的转变 (EndMT). 内皮细胞上的介质素-1受体1 (IL-1R1) 作为机械敏感受体,调解 EndMT 响应扰乱的流动.
科学领域:
- 心血管生物学 心血管生物学
- 细胞机械传导 细胞机械传导
- 动脉样硬化病原体的产生
背景情况:
- 动脉样硬化发生在血液流动 (d-flow) 受到干扰的区域,其特点是炎症和斑块不稳定.
- 内皮细胞在对d流的反应中经历了内皮细胞到介质细胞的转变 (EndMT),这有助于斑块的进展.
- 连接d-flow与EndMT的精确信号通路仍然不完全理解.
研究的目的:
- 为了研究互乐金-1受体1 (IL-1R1) 在调解d流诱导的EndMT中的作用.
- 为了确定IL-1R1作为机械敏感受体,将d流与动脉样硬化中的EndMT联系起来.
主要方法:
- 对SNAI1和IL-1R1表达的人类动脉样硬化病变的分析.
- 利用内皮特异性的Cre-lox血统追踪小鼠在体内研究IL-1R1功能.
- 在体外研究中,将内皮细胞暴露在振荡式剪切应力 (OSS) 中.
- 在内皮细胞中对IL-1R1进行遗传沉默.
主要成果:
- 在不稳定的动脉样硬化病变中,SNAI1和IL-1R1在内皮细胞中共同表达.
- 振荡剪切应力 (OSS) 在内皮细胞中增加了IL-1R1和Snail1的表达,促进了EndMT.
- 对IL-1R1的基因沉默显著降低了EndMT标记物和SNAI1核转位.
- 内皮特异性IL-1R1淘汰赛小鼠在对d-flow的反应中显示SNAI1表达减少.
结论:
- 内皮IL-1R1是一种新型机械敏感受体,它与干扰的流动对接,以传递Interleukin-1信号.
- IL-1R1在干扰流动的反应中,在介导内皮细胞到介质细胞的过渡中发挥着至关重要的作用.
- 向内皮IL-1R1可能为动脉样硬化提供治疗策略.
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