破坏tRNA修改以准耐药白血病细胞中的线粒体脆弱性
Cornelius Pauli1, Michael Kienhöfer1, Maximilian Felix Blank2
1German Cancer Research Center DKFZ, Heidelberg, Germany.
Blood
|August 1, 2025
概括
RNA的修改会影响癌症药物耐药性. 准TRMT5,对线粒体功能和tRNA甲基化至关重要,可以克服急性髓性白血病中对cytarabine和venetoclax的抵抗.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 生物化学 生物化学
背景情况:
- 不调节的RNA修改与癌症进展和治疗耐药性有关.
- 将RNA修饰与药物耐药性联系在一起的机制往往不太清楚.
- 需要进行系统的探索,以确定参与抗白血病药物耐药性的RNA修饰途径.
研究的目的:
- 使用基于CRISPR的合成致死性屏系统识别RNA修饰,以介导抗白血病药物的耐药性.
- 阐明TRMT5介导的N1-甲基瓜诺辛 (m1G) 在急性髓性白血病 (AML) 药物耐受性中的作用.
- 研究TRMT5在药物治疗下促进白血病细胞存活中的线粒体依赖性.
主要方法:
- 基于CRISPR的合成致死性选被用于识别参与抗药性基因.
- 在AML细胞中评估了TRMT5功能及其在tRNA甲基化 (m1G) 中的作用.
- 分析了线粒体功能,mRNA翻译和氧化酸化 (OXPHOS).
- 在一组AML患者中检查了基因表达和患者结局之间的相关性.
主要成果:
- 在tRNA中由TRMT5介导的m1G形成对于AML中对cytarabine和venetoclax的耐受性至关重要.
- 在药物耐受性中TRMT5的作用取决于它的线粒体功能,而不是核功能.
- TRMT5动态上调线粒体mRNA翻译和OXPHOS,支持耐药白血病细胞.
- 电子运输链基因的表达较低与AML患者的较差结果相关.
结论:
- TRMT5是通过线粒体通路在AML中药物耐受性的关键调解者.
- 准TRMT5,特别是它的线粒体功能,提供了一种潜在的策略来克服治疗阻力.
- TRMT5代表了治疗耐药白血病的一个有前途的治疗标.
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