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Piezo1和TRPM4之间的功能合会影响HL-1心房肌细胞的电活动

Yang Guo^1,2, Delfine Cheng^1,2, Ze-Yan Yu^1,2

¹Victor Chang Cardiac Research Institute, Sydney, NSW, Australia.

The Journal of physiology

|December 15, 2023

概括

这项研究表明,Piezo1通道的

科学领域:

心脏病学心脏病学
细胞生物学细胞生物学
离子通道生理学离子通道生理学

背景情况:

暂时受体潜力美拉斯4 (TRPM4) 通道对于心脏电活动至关重要.
机械敏感的Piezo1通道存在于心脏中,对机械应力做出反应.
之前的研究表明TRPM4和Piezo1共同定位并促进心脏缩信号传递.

研究的目的:

在心肌细胞模型中研究Piezo1和TRPM4之间的体外功能合.
为了确定Piezo1激活是否影响心脏动作潜力的特性.
评估TRPM4在调解Piezo1对作用潜力的影响中的作用.

主要方法:

使用小鼠HL-1心房肌细胞样细胞作为体外模型.
使用特定的激素Yoda1激活Piezo1,模仿机械拉伸.
使用电压敏感染料FluoVolt测量了动力电位变化.
通过siRNA和TRPM4抑制 (药理/遗传) 进行Piezo1敲击.

主要成果:

Yoda1诱导的Piezo1激活改变了HL-1细胞中的动作潜能频率.
皮埃佐1敲击降低了约达1对动作潜能频率的影响.
TRPM4的淘汰或抑制显著调节了Piezo1激活对动作潜能频率的影响.

结论:

提供了Piezo1和TRPM4在心肌细胞样细胞系中的功能合的体外证据.
表明机械敏感Piezo1和Ca2+激活TRPM4通道之间的相互作用是机械传感转导的关键机制.
突出了TRP道参与各种生理和病理过程的潜在无处不在的模型.

关键词:

优达1是什么意思行动潜力行动潜力行动潜力这是心肌细胞 (cardiomyocyte).芬胺酸是什么芬胺酸是什么机械敏感的机械敏感的

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