在肺腺癌中,MYC 和表皮转移到介质细胞转移 (EMT) 独立预测昼夜节律障碍
bioRxiv : the preprint server for biology
|September 2, 2025
概括
肺癌中的分子昼夜钟受损与MYC表达和细胞状态有关. 在腺癌中,高MYC和中细胞特征都独立地影响昼夜节律的破坏.
科学领域:
- 癌症学
- 时间生物学
- 分子生物学
背景情况:
- 在肺腺癌中,分子生理时钟被破坏,在小鼠模型中促进瘤生长.
- 人类肺癌中昼夜时间干扰的决定因素尚不清楚.
研究的目的:
- 研究MYC表达,上皮介质过渡 (EMT) 和人肺腺癌中昼夜时钟干扰之间的相关性.
- 确定肺瘤中昼夜干扰的新决定因素.
主要方法:
- 使用时钟相关距离 (CCD) 来评估基于人类肺瘤基因表达的昼夜时钟顺序和强度.
- 分析了MYC表达,MYC通路激活和EMT相关的基因程序.
- 在肺腺癌细胞中使用TGF-β进行实验诱导EMT,以观察对昼夜振荡的影响.
主要成果:
- 高MYC表达或MYC通路激活与显著扰乱的昼夜节律相关.
- 肺部MYC表达非常低,低于正常水平的瘤也表现出昼夜干扰.
- 在低MYC瘤中,表皮细胞转化为介质细胞 (EMT) 程序和TGF-β信号增强.
- 中瘤显示出更有序 (更强烈) 的昼夜节律.
- 在肺腺癌细胞中TGF-β诱导EMT增加了昼夜振荡的幅度.
结论:
- MYC表达和通路激活是肺腺癌中昼夜干扰的独立决定因素.
- 由TGF-β等因素诱导的中细胞状态也独立地影响肺癌的昼夜节律.
- 癌症途径 (MYC) 和细胞状态可塑性 (EMT) 都对肺腺癌的分子时钟产生重大影响.
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