在Myc驱动的淋巴瘤中,PRPS活动调整了还氧化稳态
Austin C MacMillan1, Bibek Karki1, Juechen Yang2,3
1Department of Cancer Biology, University of Cincinnati College of Medicine; Cincinnati, OH 45267, USA.
bioRxiv : the preprint server for biology
|January 27, 2025
概括
Myc通过改变细胞代谢和氧化还原平衡来驱动淋巴瘤. 准PRPS酶为MYC驱动的淋巴瘤提供了一种新的治疗策略,通过调节细胞的氧化还原状态.
科学领域:
- 在瘤学瘤学.
- 细胞的新陈代谢
- 生物化学 生物化学
背景情况:
- 肌肉过度活化通过改变细胞代谢来驱动淋巴发育.
- 氧化还原平衡对于维持癌症中细胞平衡至关重要.
- 了解Myc和氧化还原通路之间的相互作用对于开发向疗法至关重要.
研究的目的:
- 阐明控制Myc-overexpressing B细胞淋巴瘤中氧化还原稳态的途径之间的时间和功能关系.
- 确定淋巴瘤细胞中氧化还原状态的关键调节剂.
- 探索针对这些调节器的治疗策略.
主要方法:
- 在Myc-overexpressing B细胞中研究了代谢途径 (oxPPP,核酸合成,线粒体呼吸).
- 评估了基酸盐合成酶 (PRPS) 酶在调节氧化还原状态中的作用.
- 利用了PRPS1和PRPS2同酶的遗传失活.
- 进行药理学选,以评估药物敏感性.
主要成果:
- 菌的过度表达迅速刺激氧化酸路径 (oxPPP),核酸合成和线粒体呼吸,导致氧化状态.
- PRPS的依赖菌的过度激活是氧化还原状态的主要调节者.
- 在MYC驱动的淋巴瘤细胞中,PRPS2的基因失活,但不是PRPS1,会导致NADPH升高和减少性压力介导的死亡.
- 准PRPS1或PRPS2会引起对化学治疗剂的相反敏感性或耐药性.
结论:
- 菌根驱动淋巴瘤的发病包括细胞代谢和 redox 稳态的显著变化.
- PRPS酶是MYC驱动淋巴瘤中氧化还原平衡的关键调节者.
- 向PRPS1或PRPS2提供了一个潜在的治疗蓝图,通过调节氧化还原状态和药物敏感性来治疗MYC驱动的淋巴瘤.
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