膜上皮表表型的Wnt依赖调节和在人类原始细胞类细胞中的屏障功能
Yu-Che Lin1, Miki Igarashi2, Yasuyuki Sakai2
1Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan.
Biochemical and biophysical research communications
|February 12, 2026
概括
这项研究开发了一种空气-液体接口 (ALI) 培养,以建模膜再生,表明YAC(-) 条件保持了具有优越屏障功能和修复的平衡AT1/AT2状态,而β-catenin抑制促进了AT1特征.
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:
- 膜再生需要协调的膜1型 (AT1) 和膜2型 (AT2) 细胞反应以及完整的上皮屏障.
- 目前的体外试验系统往往难以同时实现血统控制和高表皮抵抗力.
研究的目的:
- 建立一个强大的体外系统来研究膜上皮的分化和功能.
- 研究β-catenin调制对膜上皮质细胞命运和屏障特性的影响.
主要方法:
- 使用小分子尾酒 (YAC) 扩展人类AT2类祖先,随后进行空气-液体接口 (ALI) 培养.
- 细胞在尾酒中与 (YAC) 或没有 (YAC(-)) 的介质培养,其中一些ALI培养物用XAV939治疗以抑制β-catenin.
- 评估了横体电阻,标记物表达 (AT1和AT2),以及伤试验中的伤口闭合.
主要成果:
- 与潜水培养相比,ALI培养显著增加了AT1和AT2标志物.
- 在ALI培养中的β-catenin抑制转移了AT1特征的配置,但减少了AT2转录标记.
- 在YAC(-) ALI条件下,表现出高跨体电阻 (kΩ范围),连续性表皮和强大的伤口关闭 (24-48h),表明优越的屏障性能和修复能力.
- 通过数影响绝对标记水平和阻力,但维持了条件之间的相对差异.
结论:
- YAC(-) ALI培养系统有效地模拟了膜上皮质分化和屏障功能.
- 在ALI培养中调节β-catenin信号传递可以使膜上皮细胞偏向AT1-类表型.
- 开发的平台为剖析膜上皮细胞生物学,维护和再生过程提供了有价值的工具.
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