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WEE1 抑制剂触发了 GCN2 介导的综合应激反应的激活
Rinskje B Tjeerdsma1, Timothy F Ng2,3, Maurits Roorda1
1Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
Nature communications
|November 25, 2025
概括
WEE1抑制剂 (WEE1i) 触发有毒综合应激反应 (ISR) 激活和转化关闭. 低剂量或组合治疗可以预防这些影响,同时保持细胞周期的控制.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 癌症治疗方法 癌症治疗方法
背景情况:
- WEE1激酶通过抑制CDK1/2.2来调节DNA复制和线粒分裂.
- 对WEE1抑制剂 (WEE1i) 的敏感性受遗传因素的影响,这些因素尚未完全理解.
- WEE1i正在作为潜在的抗癌剂进行研究.
研究的目的:
- 确定影响对WEE1抑制剂敏感性的遗传因素.
- 阐明WEE1i发挥其影响的机制,包括潜在的非目标行动.
- 探索优化WEE1抑制剂治疗的策略.
主要方法:
- 全基因组插入性突变发生屏幕,以识别敏感突变.
- 全基因组的CRISPR-Cas9屏幕用于识别抵抗机制.
- 研究了综合应激反应 (ISR) 途径的激活.
- 评估了WEE1i对DNA损伤,线粒体进入和药物协同作用的影响.
主要成果:
- 在EIF2A对WEE1i.i.敏感细胞中的突变.
- 通过GCN2或GCN1的非激活,可以挽救WEE1i诱导的细胞毒性.
- 丢失ZNF598增加了对WEE1i的敏感性.
- WEE1i诱导了矛盾的GCN2激活和ATF4上调,表明ISR激活.
- ISR激活独立于WEE1的存在,并且发生在各种细胞类型中.
- 独立于ISR,WEE1i导致DNA损伤和早期的线粒体进入.
- 低剂量WEE1抑制与PKMYT1抑制产生协同作用,而不会诱导ISR.
结论:
- WEE1抑制剂可以触发有毒的ISR激活和转化关闭.
- 通过WEE1i激活ISR是一种由GCN2介导的非目标效应.
- 低剂量或组合疗法可以减轻WEE1i诱导的毒性,同时保持治疗效益.
- 了解这些机制可以指导开发更有效的WEE1抑制剂策略.
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