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PAI-1 调节AT2 介导的再膜化和离子透性

Gibran Ali¹, Mo Zhang^1,2, Jianjun Chang¹

¹Department of Cellular and Molecular Biology, Texas Lung Injury Institute, University of Texas at Tyler Health Science Center, Tyler, TX, USA.

Stem cell research & therapy

|July 27, 2023

概括

在受伤的肺部中增加的等离子体激活剂抑制剂-1 (PAI-1) 会损害膜上皮的再生. 这是由于2型 (AT2) 膜细胞,特别是CD44+细胞的自我更新减少,阻碍了肺部的修复.

科学领域:

肺部医学肺部医学
再生医学是一种再生医学.
细胞生物学细胞生物学

背景情况:

急性肺损伤 (ALI) 标志着肺液和循环中高水平的等离子体激活剂抑制剂-1 (PAI-1).
由Serpine1基因编码的PAI-1在修复受伤的肺上皮的具体作用尚不清楚.

研究的目的:

研究Serpine1在调节2型 (AT2) 膜细胞命运中的作用.
在人类化小鼠模型中分析AT2细胞的行为,该模型具有突变的Serpine1 (Serpine1^Tg).

主要方法:

培养的野生类型 (wt) 和Serpine1^Tg AT2细胞作为单层和3D气球.
评估殖民地形成和有机体表面积.
使用免疫组织化学和FACS量化AT1和AT2细胞,并分析了上皮质屏障特性.

主要成果:

与wt对照组相比,Serpine1^Tg AT2细胞的自我更新和殖民地形成显著减少.
来自Serpine1^TgAT2细胞的器官体表现出表面积的减少,表明重新上皮质化受损.
FACS分析显示,Serpine1^Tg有机体中AT2细胞,特别是CD44+细胞较少,AT1:AT2细胞比变化.

结论:

在受伤的肺部中增加的PAI-1会对膜上皮质再生产生负面影响.
这种下调是通过减少AT2细胞自我更新来调节的,特别是影响CD44+亚群.
研究结果强调PAI-1是限制肺上皮质修复的关键因素.

关键词:

不同化的差异化器官类动物器官类动物核武器的扩散重新膜化 (Re-alveolarization) 是一种复发性疾病.塞尔平1是一个.

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