无素酶FBXW7通过调节MYC稳定性来调节白血病发起细胞活性
Bryan King1, Thomas Trimarchi, Linsey Reavie
1Howard Hughes Medical Institute and NYU Cancer Institute, NYU School of Medicine, New York, NY 10016, USA.
Cell
|June 25, 2013
概括
在T细胞急性淋巴细胞白血病 (T-ALL) 中,Fbxw7基因突变通过稳定c-Myc瘤基因来提高癌症发起细胞活性. 抑制MYC活动为T-ALL缓解提供了一个潜在的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 血液学 血液学 血液学
背景情况:
- 癌症发起细胞的体质突变可以影响自我更新和分化.
- 针对Fbxw7泛素酶结合口袋的反复突变在各种瘤中发现,包括T细胞急性淋巴细胞白血病 (T-ALL).
- 在T-ALL中,Fbxw7突变很普遍,这表明它在白血病发生中起着作用.
研究的目的:
- 研究Fbxw7突变在致癌细胞中的功能后果.
- 确定Fbxw7突变导致T-ALL发育的机制.
- 探索针对Fbxw7驱动型白血病发生的治疗策略.
主要方法:
- 产生具有可调节Fbxw7突变等位基因的动物模型.
- 评估癌症发起细胞活动与Notch1瘤基因合作.
- 在Fbxw7突变细胞中分析c-Myc无处不在和蛋白质半衰期.
- 使用c-Myc融合等位基因的c-Myc表达与白血病发起活性的相关性.
- 评估小分子MYC抑制剂用于T-ALL治疗.
主要成果:
- Fbxw7突变特别增强了Notch1瘤基因的癌症发起细胞活性,同时保留了正常的造血干细胞功能.
- FBXW7突变破坏了c-Myc蛋白的无处不在,并缩短了其半衰期,影响了一个关键的T-ALL瘤基因.
- Fbxw7的功能与c-Myc的丰富性直接相关,而高的c-Myc表达与增加的白血病发起活性相关.
- 在动物模型中,小分子抑制MYC活性会诱导T-ALL缓解.
结论:
- Fbxw7突变通过稳定c-Myc蛋白来促进T-ALL.
- 向MYC活动代表了T细胞急性淋巴细胞白血病的有前途的治疗途径.
- 了解Fbxw7在c-Myc调节中的作用,可以了解白血病的发病和治疗.
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