通过皮埃佐1调节平滑肌细胞体积,以应对增强的细胞外矩阵刚度
Robert T Johnson1, Reesha Solanki1, Finn Wostear1
1School of Pharmacy, University of East Anglia, Norwich, UK.
British journal of pharmacology
|December 3, 2023
概括
血管光滑肌细胞 (VSMC) 的体积通过Piezo1/PKC/aquaporin-1通路在刚性矩阵上增加. 针对这种途径可以增强VSMC对矩阵刚性的反应,而不会影响收缩性.
科学领域:
- 心血管生物学 心血管生物学
- 细胞力学 细胞力学
- 生物医学工程 生物医学工程
背景情况:
- 降低大动脉服从性是心血管疾病的先驱.
- 大动脉服从是由大动脉壁刚性和血管光滑肌细胞 (VSMCs) 调节的.
- 细胞外矩阵硬化降低了大动脉的服从性,并增强了VSMC硬化.
研究的目的:
- 定义驱动VSMC对矩阵刚性的反应的机制.
- 为了确定VSMC体积调节的调节器,以响应矩阵刚度.
主要方法:
- 人类大动脉-VSMCs是在模仿健康 (12 kPa) 或老年/患病 (72 kPa) 大动脉的多烯胺水凝上培养的.
- 用药理学剂处理VSMC,以确定VSMC体积的调节者.
- 研究了Piezo1的激活,离子的流入,PKC和aquaporin-1的参与.
主要成果:
- 在柔性矩阵上,VSMC的面积收缩和减少.
- 在VSMC中,呈现出类似过度化的反应,在刚性矩阵上增加面积和体积.
- Piezo1/PKC/aquaporin-1通路在刚性矩阵上调解了增加的VSMC体积;封锁阻止了这种反应,同时在柔性矩阵上保持了收缩性.
- 在VSMC表型调制中,Piezo1和aquaporin-1基因表达被上调,这与动脉样硬化相关,并在 carotid ligation 之后.
结论:
- 通过Piezo1/PKC/aquaporin-1通路,VSMC体积在响应细胞外矩阵刚性时增加.
- 该途径的药理向选择性地阻断了由矩阵刚性引起的VSMC体积增加,在健康的矩阵上保持了收缩性.
- 在疾病相关的VSMC表型中观察到Piezo1和aquaporin-1的上调,这表明了治疗潜力.
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