RTK信号传递促进了人类肺前代细胞中的上皮层柱状细胞形状和顶峰结维护
Shuyu Liu1,2, Dawei Sun1,2, Richard Butler1
1Wellcome Trust/CRUK Gurdon Institute, University of Cambridge, Cambridge CB2 1QN, UK.
概括
人类胚胎肺部有机体揭示了控制原生细胞形状的关键信号通路. 纤维细胞生长因子7 (FGF7) 激活MAPK/ERK和PI3K/AKT,这对于维持肺尖前细胞结构和增殖至关重要.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 有机物技术 有机物技术
背景情况:
- 来自人类胚胎肺部的多能上皮原生细胞可以培养成自我更新的有机体.
- 这些有机体模仿了发育中的肺尖上皮的柱状形态.
- 了解控制细胞形状的信号通路对于肺部发育研究至关重要.
研究的目的:
- 通过器官模型确定负责维持人类肺尖前代细胞柱状形状的信号通路.
- 阐明表皮生长因子 (EGF),纤维细胞生长因子7 (FGF7) 和纤维细胞生长因子10 (FGF10) 在肺原生细胞维护中的不同作用.
主要方法:
- 人类胚胎肺前代细胞在定义的介质中扩张为自我更新的有机体.
- 利用抑制剂实验来剖析下游的信号通路.
- 研究特定生长因子 (EGF,FGF7,FGF10) 对细胞形态和信号的影响.
主要成果:
- FGF7激活MAPK/ERK和PI3K/AKT信号通路,这些通路对于维持祖细胞增殖和柱状形状至关重要.
- 在MAPK/ERK下游的整合蛋白信号传递,在调节细胞极性,粘附和紧密结合组合方面发挥着至关重要的作用.
- 单独的EGF和FGF10不足以保持有机体中的柱状细胞形状.
结论:
- 通过MAPK/ERK和PI3K/AKT通路传递FGF7信号,是人类肺尖前代细胞形状和增殖的关键调节者.
- 集成蛋白信号传递是维护祖细胞结构和功能的关键下游效应因子.
- 这种有机体系统为控制人类肺部发育的细胞机制提供了宝贵的见解.
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