奥西默提尼布激活了一个TGFβ2依赖的分泌程序,该程序驱动肺腺癌的进展
Madhurima Ghosh1, Chao Wu1, Abhishek Kumar1
1Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, United States of America.
The Journal of clinical investigation
|December 9, 2025
概括
耐药EGFR突变肺癌细胞通过分泌因子促进瘤生长和转移. 这些耐奥西默提尼布的细胞使用表皮细胞到介质酶细胞的转变途径来推动癌症的进展.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 用Osimertinib (Osi) 治疗的EGFR突变肺腺癌 (LUADs) 由于耐药性持续性 (DTP) 细胞而经常复发.
- 具有表观遗传变化的DTP细胞可以恶化临床结果,但它们在LUAD进展中的作用尚未完全理解.
- 耐奥西默提尼布 (OR) 细胞表现出DTP特征,包括衰老和上皮细胞转化为介质酶体 (EMT),导致分泌状态改变.
研究的目的:
- 调查OR细胞通过近信号传递影响LUAD进展的假设.
- 阐明OR细胞促进瘤生长和转移的机制.
主要方法:
- 使用EGFR突变LUAD细胞系的先天性对,使无药 (DN) 细胞或通过慢性OSI暴露.
- 在小鼠体外共同培养和体内共同注射模型中使用.
- 分析了与EMT和衰老相关的秘密体,并调查了TGFβ2,ZEB1和分泌囊泡贩运的作用.
主要成果:
- 来自OR细胞的膜信号在体外和体外模型中显著增强了DN细胞的生长和转移潜力.
- OR细胞主要通过EMT促进了DN细胞的进展,而不是衰老,激活了不同的机密体.
- 奥西默蒂尼布治疗迅速增加了TGFβ2,启动了EMT和随后的戈尔吉重塑,以加速囊泡贩运.
- 对EMT依赖的分泌蛋白或ZEB1的耗尽减少了OR细胞的前瘤性活性.
结论:
- 抗奥西默提尼布的细胞通过副膜机制驱动LUAD的进展,主要是通过EMT诱导的信号传递.
- 准EMT依赖的分泌因子或ZEB1可能代表克服Osi抗性的治疗策略.
- 这些发现揭示了对LUAD中耐药性和瘤进化之间的复杂相互作用的关键见解.
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