铁素系统通过对核糖核酸还原酶活性的氧化还原介导调节来确定CHK1抑制剂的敏感性
Chandra Bhushan Prasad1, Adrian Oo2, Yujie Liu1
1Department of Radiation Oncology, James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University, Columbus, OH, 43210, USA.
Nature communications
|May 31, 2024
概括
检查点激酶1 (CHK1) 抑制剂在非小细胞肺癌 (NSCLC) 治疗中表现有前途. 将CHK1抑制剂与抗氧化药物auranofin结合起来,通过向脱氧核酸池来提高疗效.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 检查点激酶1 (CHK1) 在复制应激 (RS) 期间对细胞存活至关重要.
- 结合化疗的CHK1抑制剂 (CHK1i) 显示出临床前前景,但临床疗效有限,毒性显著.
- 需要新的组合策略来提高CHK1抑制剂在癌症治疗中的有效性.
研究的目的:
- 确定增强非小细胞肺癌 (NSCLC) 中CHK1抑制剂敏感性的新目标.
- 探索抗氧化剂系统的作用,特别是thioredoxin1 (Trx1),在调解CHK1抑制剂反应中的作用.
- 评估结合CHK1抑制剂与Trx1调节器的协同潜力.
主要方法:
- 在一个NSCLC细胞系中进行了无偏高通量选,以确定CHK1抑制剂敏感性的决定因素.
- 研究了Trx1介导敏感性的机制,重点研究了核糖核酸还原酶 (RNR) 活性和脱氧核酸池动态.
- 评估了NSCLC细胞中CHK1抑制剂和auranofin (TrxR抑制剂) 之间的协同相互作用.
主要成果:
- 在NSCLC中确定了硫素1 (Trx1) 作为CHK1抑制剂敏感性的关键决定因素.
- 确定Trx1通过RRM1 (RNR的一个子单元) 的氧化还原调节和随后的脱氧核酸池耗尽来影响CHK1抑制剂的敏感性.
- 证明了CHK1抑制剂和auranofin之间的协同相互作用,它中断了脱氧核酸池,导致增强的抗癌作用.
结论:
- 在NSCLC中,Trx1在调节对CHK1抑制剂的敏感性方面发挥着至关重要的作用.
- 结合CHK1抑制剂与奥拉诺芬,通过通过氧化还原调节向脱氧核酸池,为NSCLC提供了一个有前途的治疗策略.
- 这项研究强调了一种基于Trx系统和哺乳动物RNR活性之间的氧化还原调节联系的新药组合,用于NSCLC治疗.
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