转录组范围的映射揭示了白金癌症药物的RNA依赖机制
bioRxiv : the preprint server for biology
|January 9, 2026
概括
作为一种关键的化疗药物,西斯普拉丁与RNA G-四重复合体结合,影响其有效性,并揭示了一种新的基于RNA的作用机制. 这种药物-RNA相互作用预测了患者对基化疗的反应.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 小分子瘤学药物可以与RNA相互作用,但范围和意义尚不清楚.
- 众所周知,一种常见的化疗药物西斯,可以结合DNA,但也与RNA相互作用,对细胞的影响尚不清楚.
- 了解药物-RNA相互作用对于优化癌症治疗至关重要.
研究的目的:
- 系统地分析批准的抗癌药物的RNA相互作用.
- 为了研究cisplatin的体内RNA标及其功能相关性.
- 探索癌症患者药物-RNA相互作用的预后价值.
主要方法:
- 开发了PlatRNA-seq,一种点击化学试验,用于绘制全转录组的思丁-RNA相互作用图.
- 综合基因组,生物物理和计算分析.
- 分析了来自卵巢癌患者的单细胞RNA-seq数据.
主要成果:
- 发现抗癌药物广泛的RNA脱,其中西斯具有突出的结合作用.
- 西斯普拉丁在转录的5'端附近优先结合富含关氨酸的区域和RNA G-四重复合体 (rG4s).
- 西斯-rG4相互作用调节rG4的形成,RNA结合有助于西斯诱导的细胞毒性.
- 富含rG4的cisplatin-RNA标的表达预测了卵巢癌中的白金敏感性.
结论:
- 西斯普拉丁表现出一种非正规的,基于RNA的作用机制,有助于其细胞毒性.
- 药物-RNA相互作用是显著的,可以利用它来提高化疗疗效.
- 研究小分子的RNA相互作用对于治疗和预后策略至关重要.
- 药物-RNA相互作用,特别是rG4s,对于敏感性具有预后价值.
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