在皮肤伤口愈合过程中,GRHL2调节质细胞EMT-MET动态和痕形成
Tianying Chen1, Bo Zhang1, Hanqi Xie1
1MOE Key Laboratory of Bioinformatics, Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
Cell death & disease
|October 14, 2024
概括
在伤口愈合后恢复皮肤细胞上皮质特征至关重要. 该研究确定GRHL2作为一个关键因素,当缺乏时,通过防止这种必要的细胞逆转,促进痕纤维化.
科学领域:
- 皮肤病学和细胞生物学
- 伤口治愈研究研究 伤口治愈研究
- 痕的机制 痕的机制
背景情况:
- 外皮细胞在伤口愈合期间经历了上皮-介质细胞过渡 (EMT),但应该恢复到上皮状态才能正常愈合.
- 在痕组织中,表皮细胞通常保持在介质细胞状态,阻碍完整的愈合并促进纤维化.
- 控制这种介质细胞-上皮细胞过渡 (MET) 的监管机制以及其失败的后果尚不清楚.
研究的目的:
- 研究GRHL2在伤口愈合期间调节角质细胞上皮质状态中的作用.
- 为了确定持久的中细胞类表皮细胞对痕形成和纤维化的影响.
- 阐明分子通路,包括miR-200s/Zeb1轴,参与GRHL2-介导的角质细胞EMT/MET.
主要方法:
- 在伤口愈合期间分析正常,EMT和MET表皮细胞中的GRHL2表达水平.
- 在表皮细胞中操纵GRHL2表达 (敲击和过度表达) 以研究EMT/MET.
- 在皮肤伤口模型中体内干扰GRHL2,以评估对痕形成的影响.
- 在GRHL2-操纵的角质细胞中研究miR-200s/Zeb1轴.
- 用miR-200s类似物传染细胞来观察EMT逆转.
主要成果:
- 在伤口愈合期间,GRHL2的表达是动态调节的,在上皮细胞中高,在EMT细胞中低,并在MET期间增加.
- 在表皮细胞中,GRHL2 knockdown诱导EMT,而GRHL2过度表达则促进MET.
- 在伤口愈合过程中,GRHL2功能受损导致持续的介质细胞表皮细胞,促进痕纤维化 (增加厚度,原,纤维素,肌纤维细胞激活).
- GRHL2 影响 miR-200s/Zeb1 轴,miR-200s 的类似物可以在角质细胞中逆转EMT.
结论:
- 在EMT后的表皮细胞上皮质状态的恢复对于有效的伤口愈合至关重要.
- GRHL2在促进MET和预防痕纤维化方面发挥着至关重要的作用.
- 这种miR-200s/Zeb1通路与GRHL2介导的角质细胞EMT/MET有关.
- 向GRHL2或相关途径可能为预防痕形成提供治疗策略.
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