转录因子HOXA9诱导染色体修饰剂SMYD3的表达,以驱动白血病发生
Liping Zhang1, Jinqiu Zhong1, Luo Yang2
1State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University Institute of Tumor Pharmacology, College of Pharmacy, Jinan University, Guangzhou, China.
The Journal of biological chemistry
|June 1, 2025
概括
含有SET和MYND域的蛋白3 (SMYD3) 通过激活HOXA9转录来驱动急性髓性白血病 (AML). 在DOT1L抑制的同时针对这个SMYD3-HOXA9循环显示出治疗MLL-AF9驱动的AML的希望.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 融合瘤基因MLL-AF9驱动急性髓性白血病 (AML) 通过像HOXA9.9这样的目标.
- 驱动AML晚期进展的机制仍然不完全理解.
- 在MLL-AF9 AML中,HOXA9的上调会加剧DOT1L介导的H3K79甲基化效应.
研究的目的:
- 研究SET和MYND域含有蛋白3 (SMYD3) 在AML病变发生过程中的作用.
- 阐明SMYD3,H3K4三甲基化和MLL-AF9 AML中的HOXA9转录之间的调控关系.
- 评估针对SMYD3-HOXA9轴的治疗潜力.
主要方法:
- 在AML患者样本中分析SMYD3的过度表达.
- 测试确定SMYD3在H3K4me3丰富和HOXA9转录中的作用.
- 调查HOXA9和SMYD之间的反循环3.
- 结合SMYD3循环破坏和DOT1L抑制的体外和体内研究.
主要成果:
- 在AML中,SMYD3过度表达,与预后不佳相关.
- 通过H3K4me3丰富,SMYD3直接激活HOXA9转录.
- 在SMYD3和HOXA9之间的正反循环促进白血病细胞的增殖,并抑制分化.
- 联合准SMYD3-H3K4me3-HOXA9循环和DOT1L可以增强抗白血病活性.
结论:
- SMYD3通过建立一个自给自足的SMYD3-H3K4me3-HOXA9信号循环,为MLL-AF9 AML做出贡献.
- 这种循环驱动白血病发生,并呈现出潜在的治疗脆弱性.
- 针对SMYD3提供了一个有希望的策略,以克服先进的AML治疗中的挑战.
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