化学机械调节EZH2局部化控制表皮层-介质细胞过渡
Jessica L Sacco1, Zachary T Vaneman1, Ava Self1
1Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
Journal of cell science
|October 25, 2024
概括
刚性矩阵和TGF-β1信号传递促进EZH2的核局部化 (增强性基因同类物2的增强者),这是基因表达的关键调节者. 这种机制通过EZH2.2将细胞收缩性与纤维化和癌症进展联系在一起.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 甲基转移酶增强剂的zeste同源2 (EZH2) 在调节基因表达方面发挥着至关重要的作用.
- 异常的EZH2信号与纤维化和癌症的进展有关.
- 化学和机械信号在调节EZH2中的整合仍然不太清楚.
研究的目的:
- 研究化学 (TGF-β1) 和机械 (矩阵刚性) 信号是如何集成来调节EZH2.2.
- 阐明EZH2在介导矩阵刚性和TGF-β1诱导的细胞变化的作用.
- 为了确定参与EZH2.2机械传导的信号通路.
主要方法:
- 在不同硬度的矩阵上培养细胞.
- 用转化生长因子 (TGF) 治疗-β1.1.
- 对EZH2核定位和H3K27me3水平的评估.
- 抑制Rho关联激酶 (ROCK) 和肌酸酶II信号传递.
- 对基因表达和细胞形态变化的分析.
主要成果:
- 用TGF-β1在刚性矩阵上的培养促进了EZH2的核定位,并增加了H3K27me3水平.
- EZH2的活性和表达对于TGF-β1和硬度诱导的H3K27me3增加以及上皮-介质酶过渡 (EMT) 是必不可少的.
- 抑制ROCK或myosin II信号传递会降低TGF-β1诱导的EZH2核定位和H3K27me3水平在硬基质上.
结论:
- 细胞收缩性,由ROCK和myosin II调节,与TGF-β1信号集成,以控制EZH2亚细胞定位.
- 矩阵刚性和TGF-β1通过一个依赖于收缩性的机制合作调节EZH2信号传输.
- 这种机制提供了关于机械线索和生长因素如何促进EMT的洞察力,可能导致纤维化和癌症.
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