联合抑制HRAS和MEK诱导瘤回归并恢复HRAS-突变性狂宫肌肉瘤中的肌源性差异化
Patience Odeniyide1, Alyza Skaist2, Elizabeth Fenner3
1Johns Hopkins University Baltimore, Maryland United States.
Cancer research
|February 11, 2026
概括
费尔内赛转移酶抑制剂 (FTIs) 对抗RAS驱动的Rabdomyosarcomas具有有限的耐用性. 将FTIs与MEK抑制剂结合起来,通过阻断ERK的再激活来克服耐药性,为HRAS突变瘤提供了一个有希望的策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 由NRAS,HRAS或KRAS突变驱动的过度活跃的RAS信号传递是大多数PAX3/7::FOXO1融合负性狂宫瘤 (FN-RMS) 的关键驱动因素.
- 目前的间接RAS通路疗法在RAS驱动的RMS中显示出有限的疗效,需要新的治疗方法.
研究的目的:
- 研究适应性耐药性机制,限制法纳西转移酶抑制剂 (FTIs) 在HRAS突变FN-RMS中的疗效.
- 评估FTI与MEK抑制剂 (MEKi) 结合的潜力,以克服FTI耐药性并增强抗瘤效果.
主要方法:
- 利用HRAS突变FN-RMS的临床前模型来研究对FTIs的适应性抵抗力.
- 研究了ERK信号再激活和野生型 (WT) RAS上调在FTI抵抗中的作用.
- 在临床前模型中评估了结合FTase抑制与MEK抑制的疗效.
主要成果:
- FTI治疗导致了ERK信号的自适应反再激活和WT RAS的上调,限制了持久的抗瘤效应.
- 在HRAS突变RMS模型中,FTI和MEKi的组合有效抑制了ERK的活性化,并降低了ERK的转录输出.
- 结合FTase和MEK抑制抑制了瘤进展,并在临床前模型中诱导了终端肌原分化.
结论:
- 在HRAS突变RMS中对FTIs的自适应性抵抗是由ERK信号再激活和WT RAS上调调节的介导.
- 将FTase抑制剂与MEK抑制剂结合在一起,是一种有效的组合策略,可以克服耐药性.
- 这种组合疗法为HRAS突变RMS患者提供了临床前翻译的理由.
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