血栓形成素增加了对EVI1 + KMT2A-MLLT3驱动的AML表达干细胞基因的易感性,与糟糕的结果相关
Hugues-Étienne Châtel-Soulet1, Sabine Juge1, Ana Luisa Pereira2
1University Children's Hospital & Department of Biomedicine, University of Basel, Basel, Switzerland.
Nature communications
|December 19, 2025
概括
血栓形成素 (TPO) 加快来自血造干细胞 (HSC) 的积极性EVI1阳性急性髓性白血病 (AML). 这种AML亚型显示干细胞基因表达与患者的不良结果有关.
科学领域:
- 血液学 血液学 血液学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 患有KMT2A重组和EVI1表达的急性髓性白血病 (AML) 是积极的.
- 这种AML亚型的细胞起源和维持机制仍然不完全理解.
研究的目的:
- 为了调查EVI1-表达KMT2A重新排列的AML的细胞起源.
- 确定影响AML发病和进展的因素.
主要方法:
- 使用一种可诱导的KMT2A-MLLT3小鼠模型,具有Evi1-GFP记者等位基因.
- 服用血栓形成素 (TPO) 评估其对造血干细胞 (HSC) 和AML启动的影响.
- 在小鼠和人类AML样本之间比较基因表达特征.
- 进行了淘汰实验,以评估基因依赖性.
主要成果:
- 在小鼠模型中,TPO选择性地增加了循环Evi1阳性HSC,并加速了AML的启动.
- EVI1阳性KMT2A重组AML显示HSC基因 (例如IL12Rβ2,INPP4B) 的表达更高,与患者的不良结果相关.
- 对于EVI1-高AML细胞来说,MECOM是必不可少的,而IL12Rβ2的减少则影响了EVI1-低AML细胞系的生长.
结论:
- 像TPO这样的外源因素可以增加对KMT2A-MLLT3驱动的,HSC起源的EVI1-阳性AML的易感性.
- 这种AML亚型的干细胞基因表达与转化和不良预后有关.
- 在不同的EVI1-表达AML子集中确定了不同的基因依赖性 (MECOM,IL12Rβ2).
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