PI3K和MAPK信号节点作为癌症相关纤维细胞的表型可塑性在结肠直肠癌中的不同驱动因素
Zihan Xia1, Felix De Vuyst1, Sam Ernst1
1Ghent University Ghent Belgium.
Cancer research
|March 12, 2026
概括
与癌症相关的纤维细胞 (CAFs) 显示出影响瘤生长的多种亚型. 针对PI3K/mTOR和MAPK/ERK通路可以重新编程这些CAF,为结直肠癌 (CRC) 提供新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 瘤微环境研究 研究
背景情况:
- 与癌症相关的纤维细胞 (CAFs) 显示出显著的表型异质性,影响瘤进展.
- 亚型包括具有高化学/细胞因子分泌的炎症性CAF (iCAF) 和具有增强细胞外基质 (ECM) 沉积的肌纤维细胞样CAF (myCAF).
- 根据瘤微环境 (TME) 和疗法,CAFs可以切换表型,突出显示需要了解潜在的信号通路.
研究的目的:
- 阐明控制CAF表型异质性和可塑性的信号通路.
- 调查针对特定信号通路的治疗潜力,以重编程结直肠癌 (CRC) 中的CAF.
主要方法:
- 来自CRC患者的单细胞RNA测序数据的分析,以确定与myCAF和iCAF亚型相关的途径.
- 在3D人体CRC衍生的CAF培养物,ex vivo患者衍生的瘤碎片和小鼠模型中,对12种不同的信号通路的药理抑制.
- 评估CAF的功能行为,包括ECM沉积,细胞因子分泌和对瘤生长和透的影响.
主要成果:
- 确定PI3K/mTOR和MAPK/ERK信号通路分别是myCAF和iCAF形成的关键调节者.
- PI3K/mTOR抑制通过FGF-2/FGFR1/JAK2/STAT3信号传递促进了iCAF表型,增加了瘤球状细胞的生长和中性粒细胞的透.
- 通过干扰素依赖的ROCK和JAK1信号传递,MEK抑制诱导了myCAF表型,增强了ECM产生和瘤殖民地形成.
结论:
- 在CRC TME中,PI3K/mTOR和MAPK/ERK信号通路在CAF可塑性和功能状态中发挥着关键作用.
- 针对这些途径可以在治疗上重编程CAF,从而影响瘤的进展.
- 标准护理的向疗法可以直接调节CRC中的CAF表型,强调它们在治疗策略中的重要性.
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