在胰腺癌中,垂直RAS通路的抑制驱动了可用于治疗的线粒体变化
Philipp Hafner1,2, Steffen J Keller1,2, Xun Chen1,3
1Department of General and Visceral Surgery, Center for Surgery, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany.
胰腺癌中双重SHP2/MEK1/2抑制导致线粒体变化和铁亡的脆弱性. 将其与GPX4抑制相结合,抑制了瘤生长,为KRAS突变的PDAC提供了一个新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 代谢途径 代谢途径
- 癌症治疗 癌症治疗
背景情况:
- 瘤性KRAS突变是胰腺管腺癌 (PDAC) 和其代谢重编程的关键驱动因素.
- SHP2对于KRAS活性至关重要,双重SHP2/MAPK抑制正在PDAC治疗中进行临床研究.
- 在PDAC中,耐疗性可能来自可利用的代谢适应.
研究的目的:
- 研究PDAC中双重SHP2/MEK1/2抑制引起的代谢变化.
- 确定脆弱性和潜在的治疗策略,以克服PDAC中对SHP2/MEK1/2抑制的抗性.
主要方法:
- 对人类和小鼠PDAC细胞系,内源性瘤模型和患者衍生器官的全面分析.
- 评估线粒体质量和功能,ROS恒温,脂质过氧化,合成体路径,自和糖解.
- 通过组合治疗和体内瘤抑制研究来评估ferroptosis诱导.
主要成果:
- 双重SHP2/MEK1/2抑制显著改变了线粒体功能,ROS稳态,并在PDAC中诱导了脂质过氧化酶依赖.
- 线粒体重塑持续到耐治疗状态,从而造成对铁亡的脆弱性.
- 组合疗法包括SHP2/MEK1/2抑制和GPX4抑制,或与甲斐林A一起,在体内抑制了瘤进展.
结论:
- 代谢适应,特别是线粒体重塑,对于PDAC对SHP2/MEK1/2抑制的反应至关重要.
- 与SHP2/MEK1/2抑制相结合,向铁亡是一种有前途的PDAC治疗策略,不论分子亚型如何.
- 这项研究确定了一个代谢脆弱性,可以利用它来增强PDAC治疗RAS通路干扰.
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