通过增加BCL2L1表达,NSUN2-FOSB互惠促进了m5C依赖的白血病发生,从而增加了BCL2L1表达
Bin Zhou1, Yigang Yuan1, Yue Cai2
1Medical Research Center, The First Affiliated Hospital of Wenzhou Medical University, 1 Xuefubei Street, Ouhai District, Wenzhou, Zhejiang Province.
Haematologica
|March 12, 2026
概括
RNA甲基转移酶NSUN2在急性髓性白血病 (AML) 中被上调,并通过稳定FOSB mRNA来驱动白血病发生. 准NSUN2-FOSB-BCL2L1通路为AML提供了一个潜在的治疗策略.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 血液学 血液学 血液学
背景情况:
- NOP2/Sun RNA甲基转移酶家族成员2 (NSUN2) 在正常血液形成和白血病发生中的作用尚不清楚.
- NSUN2催化了RNA上的5甲基细胞因 (m5C) 修饰,影响了mRNA的稳定性.
- 在急性髓性白血病 (AML) 患者样本中发现NSUN2的升调.
研究的目的:
- 为了研究NSUN2在急性髓性白血病 (AML) 发病过程中的作用.
- 探索NSUN2作为AML治疗点的潜力.
主要方法:
- 在小鼠MLL-AF9 (MA9) 转化AML模型中,NSUN2敲除 (KD) 和基因切除.
- 分析白血病干细胞 (LSC) 的自我更新,增殖,亡和殖民地形成.
- 研究NSUN2的机制,包括FosB原瘤基因 (FOSB) 的mRNA稳定和B细胞淋巴瘤-2样蛋白1 (BCL2L1) 的表达.
主要成果:
- 在小鼠AML模型中,NSUN2敲除/切除损害了AML细胞增殖,诱导了亡,减少了殖民地形成,并延长了生存时间.
- 缺乏NSUN2会损害LSC的自我更新,而不会导致正常的造血.
- 通过m5C修饰,NSUN2稳定了FOSB mRNA,对FOSB进行上调,后者反过来转录地激活NSUN2,创建一个前循环. 此外,FOSB还促进了BCL2L1的表达.
结论:
- 在AML白血病发生过程中,NSUN2通过一种m5C依赖的机制,涉及FOSB-BCL2L1轴,在AML白血病发生过程中发挥关键作用.
- NSUN2-FOSB-BCL2L1通路代表了AML治疗的新型治疗标.
- 准NSUN2可以提供一种选择性的AML治疗方法,避免正常的血液形成.
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