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Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
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相关实验视频

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皮埃佐通道调节人类肺纤维细胞的功能.

Mengning Zheng1,2, Yang Yao2,3, Niyati A Borkar2

  • 1Department of Respiratory and Critical Care Medicine, Guizhou Province People's Hospital, Guiyang, China.

American journal of physiology. Lung cellular and molecular physiology
|August 27, 2024
PubMed
概括
此摘要是机器生成的。

人类肺纤维细胞的机械拉伸通过Piezo 1 (PZ1) 通道增加了细胞外基质的产生. 针对这些机械敏感通道可能会减少气道重塑和纤维化.

关键词:
在ERK的信号传输中.皮埃佐道的道气道改造 气道改造 气道改造人类肺部纤维细胞.拉伸 拉伸 拉伸 拉伸 拉伸

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科学领域:

  • 细胞生物学 细胞生物学
  • 机械生物学 机械生物学
  • 肺部医学 肺部医学

背景情况:

  • 支气管和肺膜在呼吸过程中以及机械通风,喘和COPD等条件下经历机械拉伸.
  • 这种延伸可以导致气道重塑,其特点是细胞外基质 (ECM) 生产增加,这一过程关键地涉及纤维细胞.
  • 将机械拉伸与纤维细胞驱动的ECM重塑联系在一起的精确机制,特别是机械敏感通道的作用,仍未得到充分探索.

研究的目的:

  • 研究Piezo (PZ) 通道,特别是Piezo 1 (PZ1) 在人肺纤维细胞中机械拉伸诱导的气道重塑中的作用.
  • 阐明信号通路,包括ERK和流入,参与PZ1-介导的机械拉伸反应.
  • 评估针对PZ通道作为缓解气道改造的治疗策略的潜力.

主要方法:

  • 人类肺纤维细胞经历了48小时的静态 (10%) 和动态 (5%) 拉伸的组合.
  • 测量了 I 原,纤维素,α-SMA 和 PZ1 的表达水平.
  • 实验涉及使用PZ1激动剂 (Yoda1) 和抑制剂 (GsMTx4),以及通过siRNA击败PZ1.
  • 评估了ERK和Smad通路的激活,以及细胞内 ([Ca2+]i) 对组胺的反应.

主要成果:

  • 机械拉伸显著增加了原I,纤维素和α-SMA的表达.
  • 作为PZ1的激动剂,Yoda1模仿并增强了拉伸引起的ECM组件的增加.
  • 使用PZ1抑制剂GsMTx4或PZ1倒置的预处理减弱了这些拉伸诱导的效应.
  • 伸展激活了ERK通路,但不是Smad,这是一种依赖于PZ1.1的效应.
  • 在机械拉伸后观察到的PZ1敲击削弱了对基因素的增强[Ca2+]i反应.

结论:

  • 皮埃佐1通道是肺纤维细胞中机械拉伸诱导的细胞外基质生产的重要媒介.
  • PZ1信号涉及ERK通路激活和流入,有助于纤维细胞激活和潜在的气道重塑.
  • 准纤维细胞中的皮埃佐通道为减少ECM沉积和改善肺纤维化提供了一个有希望的治疗途径.