在慢性髓性白血病中,TGF-β-FOXO信号维持白血病发起细胞
Kazuhito Naka1, Takayuki Hoshii, Teruyuki Muraguchi
1Division of Molecular Genetics, Center for Cancer and Stem Cell Research, Cancer Research Institute, Kanazawa University, Kanazawa, Ishikawa 920-0934, Japan. kazunaka@kenroku.kanazawa-u.ac.jp
Nature
|February 5, 2010
概括
缺乏Foxo3a显著降低慢性髓性白血病 (CML) 的干细胞活性. 针对TGF-β-FOXO通路与伊马替尼一起,为CML根除提供了一个新的策略.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 慢性髓性白血病 (CML) 的发病包括BCR-ABL氨酸激酶,它激活了Akt信号,抑制了分叉体O转录因子 (FOXO).
- 伊马替尼治疗是有效的,但无法消除CML白血病发起细胞 (LICs),导致疾病复发.
研究的目的:
- 调查Foxo3a在维持CMLLICs中的作用.
- 探索TGF-β途径对CML LIC中Akt激活和Foxo3a局部化的影响.
- 为了评估CML LIC枯竭的组合疗法.
主要方法:
- 采用了一种合成的移植系统和一种类似CML的骨髓增殖性疾病小鼠模型.
- 在LIC中评估了Foxo3a局部化和Akt酸化.
- 进行了Fox3a缺乏和野生型CML LICs的连续移植实验.
- 在体外研究了TGF-β抑制对人类CMLLICs的影响.
主要成果:
- 福克索3a缺乏症显著降低了CML LICs的致病能力.
- 核Foxo3a局部化和减少Akt酸化在LICs中得到丰富.
- 确定TGF-β是LIC中Akt激活和Foxo3a定位的关键调节者.
- 结合抑制TGF-β,Foxo3a缺乏症和伊马替尼在体内有效地减少了CML.
- 抑制TGF-β降低了人类CML LICs的殖民地形成能力.
结论:
- 福克索3a在维持CML LICs方面发挥着至关重要的作用.
- 在体内,TGF-β-FOXO通路对于CML LIC维护至关重要.
- 针对这种途径为CML根除提供了一个有希望的治疗策略.
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