综合应激反应的血统可塑性是癌症进化的一个标志
bioRxiv : the preprint server for biology
|February 24, 2025
概括
综合应激反应 (ISR) 通过促进可塑性和干性来驱动癌症脱差和治疗耐药性. 抑制ISR信号阻断了肺癌模型中的瘤生长和线粒体功能障碍.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- "压力表型"和综合应激反应 (ISR) 对癌症生存至关重要,但它们在瘤进化和异质性中的作用尚不清楚.
- ISR促进瘤生长,但其驱动瘤进化和异质性的特定机制需要进一步阐明.
研究的目的:
- 调查ISR激活在脱差,耐治疗癌细胞状态的出现中的作用.
- 阐明ISR驱动瘤进化,可塑性和异质性的机制.
主要方法:
- 利用基因工程小鼠模型研究ISR激活.
- 分析了酸化eIF2 (p-eIF2) 和ATF4在瘤进展中的作用.
- 研究了p-eIF2-ATF4轴的遗传或药理抑制的影响.
主要成果:
- 通过高的p-eIF2和ATF4标志着ISR激活,对于非分化,耐治疗的细胞状态至关重要.
- 通过ATF4和MYC,ISR促进瘤细胞的可塑性,干性和表皮-介质细胞过渡 (EMT) 现型.
- 通过ISR介导的基因表达维持了线粒体功能,这对瘤进展至关重要.
- 抑制p-eIF2-ATF4信号破坏瘤生长,并在肺腺癌 (LUAD) 模型中引起线粒体功能障碍.
- 由ISR驱动的脱差与人类LUAD的不良预后和治疗耐药性相关.
结论:
- ISR激活是瘤脱差,可塑性和治疗耐药性的关键驱动因素.
- 阻断ISR是一种有前途的治疗策略,可以破坏瘤的演变并克服LUAD中的抗性.
- 针对p-eIF2-ATF4轴及其对线粒体的下游影响,为癌症治疗提供了一种新的方法.
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