白血病发生是由骨质母细胞中激活β-catenin突变引起的
Aruna Kode1, John S Manavalan1, Ioanna Mosialou1
1Department of Medicine, Division of Endocrinology, College of Physicians & Surgeons, Columbia University, New York, New York 10032, USA.
Nature
|January 17, 2014
概括
激活骨质母细胞,骨形成细胞中的特定基因,可以通过Notch信号来破坏血细胞发育,从而触发急性髓性白血病 (AML). 抑制这种途径显示出治疗AML的前景.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 骨质细胞系细胞影响造血干细胞和B细胞发育.
- 骨质母细胞与白血病前的疾病有关,但对骨质母细胞诱导白血病的直接遗传原因尚不清楚.
研究的目的:
- 为了研究骨质母细胞中单一的遗传变异是否可以诱导白血病.
- 确定骨质细胞遗传变化导致白血病的分子机制.
- 探索针对白血病中已识别的途径的治疗潜力.
主要方法:
- 在小鼠骨质母细胞中诱导激活β-catenin突变.
- 对造血干细胞分化和白血病发展的分析.
- 评估Notch信号通路的激活和抑制.
- 临床相关性与患者样本显示骨髓质疏松综合征或急性骨髓性白血病.
主要成果:
- 在骨质母细胞中激活β-catenin突变改变了髓状和淋巴状前体的分化,导致具有染色体异常的急性髓状白血病.
- 激活的β-catenin上调了骨质母细胞中的Notch Ligand Jagged 1,随后激活了血造干细胞原始体中的Notch信号.
- 诺奇信号的遗传或药理抑制减少了急性髓性白血病的进展.
- 在38%的AML/MDS患者中观察到骨质母细胞中β-catenin信号的增加和血液细胞中Notch信号的增加.
结论:
- 骨质母细胞的遗传变化可以直接诱导急性髓性白血病.
- 骨质母细胞中的β-catenin-Notch信号轴是白血病发展的关键驱动因素.
- 准划分信号为急性髓性白血病提供了潜在的治疗策略.
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