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在心肌梗塞后进行心室重塑

Meiyan Sun^1,2,3, Sui Mao^1,2, Chao Wu^1,2

¹Department of Anesthesiology and Perioperative Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China (M.S., S.M., C.W., C.G., J.H., S.X., H.T., S.H., Y.Z.).

|January 18, 2024

概括

背部根神经元中的机械敏感Piezo1通道驱动心脏病发作后的神经性炎症和心室重塑. 抑制Piezo1或IL-6可以减少这种损伤,从而揭示出新的治疗点.

科学领域:

心血管生物学
神经免疫学
机械生物学

背景情况:

心室重塑是心力衰竭死亡率和发病率的关键预测因素.
通过神经和免疫系统调节的机械传导驱动心室重塑.
在机械传导中控制神经/免疫/心脏轴的特定分子因素仍然不清楚.

研究的目的:

调查机械敏感的皮埃佐离子通道介导的神经性炎症级联在心室重塑中的作用.
确定胸腔背根 (TDRG) 中的Piezo1是否会影响心肌梗塞 (MI) 后心室重塑过程中的机械传导.

主要方法:

通过左冠状动脉绑定建立了慢性心肌梗塞 (MI) 的小鼠模型.
分别在老鼠和小鼠的TDRG神经元中使用了lentivirus介导的淘汰和腺相关病毒介导的淘汰.
通过中和抗体和基因淘汰,研究了interleukin-6 (IL-6) 在TDRG神经元中的作用,同时对初级TDRG神经元进行了体外研究.

主要成果:

在心脏病发作后4周,TDRG神经元中的Piezo1和IL-6表达和激活增加.
在TDRG神经元中降低或淘汰Piezo1,降低了心室重塑的严重性和IL-6水平.
在TDRG神经元中抑制或降低IL-6改善了心室重塑,但没有影响Piezo1水平.
增强的Piezo1活动增加了TDRG神经元的IL-6释放.

结论:

在心脏病发作4周后,Piezo1在心室重塑中起着至关重要的作用.
涉及Piezo1和IL-6的神经性炎症级联是神经免疫信号轴的关键组成部分.
这项研究揭示了导致心力衰竭的新途径.

关键词:

皮耶索背部根结其他类型机械传导心肌梗塞神经性炎症心室重塑

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