核心生理时钟基因调节AML中的白血病干细胞
Rishi V Puram1, Monika S Kowalczyk2, Carl G de Boer2
1Department of Medicine, Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA; Program in Biological and Biomedical Sciences, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of Harvard University and MIT, Cambridge, MA 02142, USA.
核心生物钟基因Clock和Bmal1对于急性髓性白血病 (AML) 细胞生长至关重要. 破坏这些基因会阻止白血病的进展,并消耗白血病干细胞 (LSC).
科学领域:
- 血液学
- 分子生物学
- 时间生物学
背景情况:
- 白血病干细胞 (LSC) 驱动急性骨髓性白血病 (AML),并且是关键的治疗点.
- 鉴定LSC存活和扩散的重要基因是开发治疗AML的关键.
研究的目的:
- 在急性髓性白血病 (AML) 中确定白血病干细胞 (LSC) 功能的基本转录因子 (TFs).
- 研究生物钟在AML病变和LSC维持中的作用.
主要方法:
- 在小鼠AML模型中使用组合的体内RNA干扰 (RNAi) 查.
- 分析了在AML细胞增殖,分化和LSC枯竭中发现的基因的功能.
- 采用基因淘汰模型来评估白血病对昼夜通路的特定依赖.
主要成果:
- 在体外和体内的AML细胞生长中确定了昼夜节律转录因子Clock和Bmal1.
- 证明核心昼夜通路组件的干扰具有抗白血病作用,包括增殖受损,骨髓分化增强和LSC枯竭.
- 证实正常和恶性造血细胞都具有功能性生理时钟, 但AML对这种途径有特定的依赖性.
结论:
- 核心生物钟基因在急性髓性白血病的生物学和传播中起着至关重要的作用.
- 昼夜路径代表了AML的潜在治疗脆弱性,为治疗开发提供了新的途径.
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