结肠干细胞两极分化的致癌现象
Xiao Qin1, Ferran Cardoso Rodriguez1, Jahangir Sufi1
1Cell Communication Lab, Department of Oncology, University College London Cancer Institute, 72 Huntley Street, London WC1E 6DD, UK.
Cell
|December 8, 2023
概括
结肠直肠癌 (CRC) 突变会覆盖正常的细胞通信,将细胞陷入超增殖状态. 这项研究揭示了瘤基因和微环境信号如何相互作用来控制结肠癌中的细胞命运.
科学领域:
- 细胞生物学
- 癌症研究
- 基因组学
背景情况:
- 结肠直肠癌 (CRC) 的发展包括内在的致癌突变和外在的微环境信号.
- 了解这些因素之间的相互作用对于绘制细胞命运调节至关重要.
- 目前的研究往往单独研究这些影响.
研究的目的:
- 功能地绘制细胞内在和细胞外在线索如何共同调节结肠器官中的细胞命运.
- 系统地分析CRC瘤突变,微环境细胞,体连接体和信号抑制剂对细胞命运的影响.
- 阐明驱动不同癌症干细胞状态之间的转变机制.
主要方法:
- 对1107种结肠器官培养进行了系统的单细胞分析.
- 使用多重化单细胞分析来评估表皮分化表皮.
- 研究了特定的瘤基因 (APC,KRASG12D),结构元件 (纤维细胞,巨细胞,连接体) 和信号通路 (WNT3A,TGF-β,YAP,MAPK,PI3K) 的作用.
主要成果:
- 从复苏性结肠干细胞 (revCSCs) 到超增殖性CSCs (proCSCs) 的逐步表皮分化的现象.
- 包括WNT3A,TGF-β,YAP,KRASG12D和MAPK/PI3K信号传递在内的revCSC转变的关键调节者.
- 证明APC损失和KRASG12D协作限制了对revCSC的访问并破坏了树皮-上皮沟通.
- 表明瘤基因突变阻碍细胞外部调节,
结论:
- 在结直肠癌中,瘤基因突变占主导地位.
- 细胞命运可塑性的细胞外部调节受到瘤突变的阻碍.
- 了解这些相互作用是开发向CRC治疗的关键.
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