软机械传导的YAP无活化缓解了MAFG的瘤细胞分化
Jiadi Lv1, Xiaohan Liu2, Yabo Zhou1
1Department of Immunology & State Key Laboratory of Common Mechanism Research for Major Diseases, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College (PUMC), Beijing, 100005, China.
来自软矩阵的低机械力驱动瘤细胞去分化成类似干细胞. 这个过程涉及整合蛋白β8,RhoA,YAP和MAFG,影响癌症预后和治疗策略.
科学领域:
- 在瘤学瘤学.
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
背景情况:
- 固体瘤细胞存在于一个动态的机械微环境中.
- 细胞外矩阵的机制传导影响瘤细胞的发展,但机制尚不清楚.
研究的目的:
- 研究细胞外矩阵力学如何调节瘤细胞分化.
- 阐明参与机械转导诱导瘤细胞脱差的分子途径.
主要方法:
- 研究了矩阵刚度对瘤细胞表型的影响.
- 利用分子生物学技术来识别关键的信号蛋白 (整体蛋白β8,RhoGDI1,RhoA,YAP,MAFG).
- 分析了干性基因 (NANOG,SOX2,NESTIN) 的表达.
主要成果:
- 软矩阵机械力诱导了中度硬的瘤细胞转化为干细胞类细胞的脱差.
- 集成蛋白β8转导机械信号,导致RhoA通过RhoGDI1被禁用,随后YAP被禁用.
- YAP无活化释放MAFG抑制,促进干性基因的转录和恢复整合蛋白β8表达,形成一个反循环.
- MAFG表达与较差的患者预后相关.
结论:
- 来自细胞外基质的机械力量在调节瘤细胞脱差方面发挥着至关重要的作用.
- 一个涉及整蛋白β8,RhoA,YAP和MAFG的新型信号轴调解了这个机械转导过程.
- 这些发现通过调节瘤机械微环境,为癌症治疗提供了新的治疗点.
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