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Mechanically-gated Ion Channels01:12

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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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高水静压通过激活Piezo1来加剧膀纤维化.

Bo-Lang Deng1, Dong-Xu Lin1, Zhi-Peng Li1

  • 1Department and Institute of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.

Current medical science
|June 26, 2024
PubMed
概括

高水静压 (HHP) 激活Piezo1通道,通过促进纤维细胞增殖和亲纤维细胞因子表达,恶化膀纤维化. 这表明Piezo1是膀出口阻塞并发症的潜在治疗标.

关键词:
这是一个Piezo1.膀出口阻塞 膀出口阻塞纤维化 纤维化高水静压的高水静压压力

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科学领域:

  • 泌尿器科 泌尿器科 泌尿器科 泌尿器科
  • 细胞生物学 细胞生物学
  • 生物物理学的生物物理.

背景情况:

  • 膀出口阻塞 (BOO) 会导致慢性纤维化和膀压力增加.
  • 皮埃佐1通道具有机械敏感性,对机械刺激做出反应.

研究的目的:

  • 研究高水静压 (HHP) 对Piezo1活动的影响.
  • 确定Piezo1在膀纤维化进展中的作用.

主要方法:

  • 通过免疫光检测评估了老鼠膀纤维细胞中的Piezo1蛋白水平.
  • 暴露在HHP (50或100cmH2O) 或正常条件下的纤维细胞.
  • 使用Piezo1,YAP1和ROCK1激动剂/抑制剂来阐明机制.

主要成果:

  • HHP增加了Piezo1表达,亲纤维细胞因子和纤维细胞增殖.
  • 增加的Piezo1,YAP1和ROCK1水平和流与增加的压力相关.
  • 抑制Piezo1减弱了HHP诱导的影响;Piezo1激活模仿了这些影响.

结论:

  • 高水静压可能会通过激活Piezo1.1,使膀纤维化恶化.
  • 准Piezo1可能为BOO诱导的纤维化提供治疗策略.