针对tRNA-依赖型铁素的使用揭示了肝细胞癌中的代谢脆弱性
Hongli Zhang1, Zixuan Wang1, Yiqi Zhao1
1State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, P. R. China.
Nature communications
|March 6, 2026
概括
肝癌细胞使用氨酸来生长,但限制其可用性会阻止瘤的发展. 针对这种铁素依赖性为肝细胞癌 (HCC) 提供了一个新的治疗策略.
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:
- 癌细胞重新编程翻译和新陈代谢以支持瘤发生.
- 肝细胞癌 (HCC) 呈现出矛盾的低氨酸水平,尽管吸收增加和代谢减少.
研究的目的:
- 研究氨酸在HCC进展中的作用.
- 探索限制氨酸翻译可用性 (RTTA) 在HCC中的治疗潜力.
主要方法:
- 分析了MYC驱动的铁基-tRNA合成酶1 (YARS1) 和tRNA-TyrGUA的上调.
- 通过饮食限制,YARS1/tRNA-TyrGUA切除,氨酸降解 (TAL) 或YARS1抑制 (tyrosinol) 来诱导RTTA.
- 用全基因组的CRISPR查来识别基因修饰剂.
主要成果:
- 在HCC模型中,RTTA减轻了瘤发生和延长了存活时间.
- RTTA降低了NDUFB8和SCD1的翻译,导致线粒体功能障碍和铁亡.
- 失去GPX4和BCL2增强了RTTA的抗癌作用.
结论:
- RTTA是一种可行的治疗策略,针对HCC的铁素依赖.
- 翻译代谢交叉和铁亡途径的组合向对肝癌治疗有希望.
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