铁过载促进正常造血干细胞的骨髓分化,并在急性骨髓白血病中培养巨介导的免疫抑制
Feifei Yang1, Shulin Luo1, Dan Yang1
1Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
Frontiers in immunology
|August 29, 2025
概括
在急性髓性白血病 (AML) 中,铁过载会破坏正常的造血干细胞 (HSC),并促进白血病相关的巨细胞 (LAM) 转变为M2表型,从而降低抗白血病免疫力.
科学领域:
- 血液学
- 免疫学
- 癌症生物学
背景情况:
- 系统性铁过载是急性髓性白血病 (AML) 的重大临床挑战.
- 已知过量的铁会影响AML细胞并重塑造血细胞生态系统.
- 铁过载对AML微环境中的正常HSC和免疫细胞的影响尚不清楚.
研究的目的:
- 研究白血病微环境中的铁过载如何调节AML中的正常造血干细胞 (HSC) 和白血病相关的巨细胞 (LAM).
- 在AML进展的背景下,阐明铁过载对HSC和LAM的功能后果.
主要方法:
- 建立了一个MLL-AF9诱导的AML小鼠模型,具有铁过载 (MA9/FE).
- 通过流细胞计,增殖,亡和移植测定来评估HSC的维持和分化.
- 通过RNA测序,流细胞测量,培试验和LAM枯竭研究分析了LAM激活和功能.
主要成果:
- 铁过载导致正常的骨髓细胞分化.
- 铁过载促进了LAM偏向到M2表型,降低了它们对白血病细胞的细胞功能.
- 铁过量诱导的LAM表现出耐受性表型,抑制T细胞激活并加速AML的进展.
结论:
- 在AML中,铁过载显著重塑了造血生态系统.
- 铁过载会损害HSC功能,并促进M2型白血病LAM表型.
- 向LAM可能在AML治疗中具有治疗潜力.
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