在AML中,PHF6抑制白血病干细胞的自我更新
Sapana S Jalnapurkar1, Aishwarya S Pawar1,2, Subin S George3
1Division of Hematology and Oncology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Leukemia
|July 14, 2024
概括
丢失PHF6基因通过增加白血病干细胞自我更新,增强急性髓性白血病 (AML) 的攻击性. 这是因为PHF6的丧失扩大了白血病发起细胞群,并促进了更像干细胞的状态.
科学领域:
- 血液学 血液学 血液学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 急性髓性白血病 (AML) 是一种由白血病干细胞 (LSC) 驱动的异质癌症,具有不受控制的自我更新和受损的分化.
- 染色体结合蛋白PHF6在骨髓性白血病中经常发生突变.
- 仅PHF6的损失就增强了造血干细胞 (HSC) 的自我更新,但不会导致恶性转变.
研究的目的:
- 研究PHF6在AML病原和LSC功能中的作用.
- 确定PHF6损失如何影响AML的攻击性和白血病发起细胞 (LICs) 的频率.
- 阐明PHF6损失影响LSC身份和自我更新的机制.
主要方法:
- 在连续移植实验中使用了Hoaxa9驱动的AML小鼠模型.
- 通过识别白血病发起细胞丰富 (LIC-e) 群体,定义了AML的体内层次.
- 对小鼠AML细胞,人类AML细胞系和患者样本 (BEAT AML数据集) 进行了转录组分析,这些样本具有和没有PHF6.
- 评估细胞周期和细胞亡率,以了解LIC-e积累机制.
主要成果:
- Phf6淘汰赛显著增加了AML的攻击性和连续移植中的LIC频率.
- f6的丧失扩大了LIC-e群体,并诱导了更类似于干的转录状态.
- 在Phf6淘汰赛模型中观察到的转录组转移在小鼠模型,人类AML细胞系和患者样本中一致.
- 在Phf6淘汰赛AML中的LIC-e积累归因于后代保持LIC-e身份的比例增加,而不是细胞周期变化或细胞亡.
结论:
- 通过特定环境的机制促进LSC自我更新,PHF6的损失加剧了AML.
- PHF6在调节LSC身份和防止AML不受控制的自我更新方面发挥着关键作用.
- 准PHF6功能可能通过调节LSC行为为AML提供治疗策略.
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