MARCH8/NSUN6/ROS介导的DNA损伤正反循环调节骨髓瘤中西斯普拉丁耐药性
Mingyu He1,2, Tao Li2, Ao Wang2
1Department of Pharmacy (The University Key Laboratory of Drug Research, Heilongjiang Province), The Second Affiliated Hospital of Harbin Medical University, State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD), Harbin, China.
Cell death and differentiation
|July 19, 2025
概括
研究人员发现,NSUN6蛋白水平通过调节过氧体合成,影响骨髓瘤进展和药物耐药性. 较低的NSUN6导致骨髓瘤细胞对思普拉丁化疗的敏感性增加.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 骨髓瘤是一种常见的儿童骨癌,经常表现出化学疗法耐药性.
- 对于RNA5甲基细胞因子 (m5C) 修饰在骨髓瘤药物耐药性的作用尚不清楚.
研究的目的:
- 研究NSUN6 (NOP2 / SunRNA甲基转移酶家族成员6) 在骨髓瘤进展和化学抵抗中的功能.
- 阐明NSUN6在骨髓瘤中的作用背后的分子机制.
主要方法:
- 确定NSUN6是一种m5C甲基转移酶,与骨髓瘤进展相关.
- 在MARCH8.8之前研究了NSUN6的无化和降解.
- 分析了NSUN6对PEX1和PEX3mRNA稳定性和过氧体生物发生的影响.
- 评估了对活性氧物种 (ROS) 水平和西斯丁敏感性的影响.
主要成果:
- NSUN6与骨髓瘤进展具有积极的相关性.
- 通过MARCH8介导的全方位化导致NSUN6的蛋白质体降解.
- 减少NSUN6会损害PEX1/PEX3mRNA上的m5C修饰,降低过氧体合成和催化酶的产生.
- 这导致ROS,DNA损伤增加,骨髓瘤细胞对西斯普拉丁的敏感性增加.
- 一个积极的反循环存在,在高的ROS增强NSUN6降解.
结论:
- 一个NSUN6-m5C-YBX1-PEXs信号轴调节过氧体生物发生,ROS积累和骨髓瘤中platin反应.
- 这一途径阐明了m5C在骨髓瘤化学抵抗中的作用.
- 针对NSUN6及其相关网络提供了一个潜在的战略,以克服抗化学物质.
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