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急性髓性白血病的微环境通过NFκB信号传递损害了中性粒细胞的成熟和功能

Paran Goel¹, Sajesan Aryal², Alana M Franceski¹

¹The University of Alabama at Birmingham, Birmingham, Alabama, United States.

|July 15, 2025

概括

急性髓性白血病 (AML) 导致不成熟的炎症性中性粒细胞,损害免疫功能并增加患者的感染风险. 这项研究揭示了AML如何影响健康的中性粒细胞发育和功能.

科学领域:

血液学血液学血液学
免疫学免疫学免疫学
癌症生物学癌症生物学

背景情况:

急性髓性白血病 (AML) 是由造血干细胞的突变驱动的.
对于AML对健康,非突变的血细胞,特别是中性粒细胞的影响尚不清楚.
在AML患者中,中性症增加了对感染的易感性,强调了研究中性粒细胞功能的必要性.

研究的目的:

研究暴露于AML的中性粒细胞的特征和功能后果.
了解AML病理生物学如何影响颗粒形成和中性粒细胞成熟.
确定AML相关的中性粒细胞功能障碍和免疫抑制的基础分子机制.

主要方法:

利用一个临床前AML小鼠模型与中性粒细胞记者宿主.
在AML暴露的中性粒细胞上进行单细胞转录组学.
对骨髓中性粒细胞进行了ex vivo细胞因子查.
分析了染色体重塑和转录因子结合部位.
评估了AML暴露中性粒细胞对T细胞增殖的影响.

主要成果:

暴露于AML的中性粒细胞表现出成熟受损和炎症特征增加,包括CD14表达.
鉴定出NFκB信号传递是中性粒细胞中CD14表达的驱动因素.
染色体重塑表明C/EBPs和IRFs的结合发生了变化.
暴露于AML的中性粒细胞抑制了T细胞的增殖,表明免疫抑制能力.
在人类AML患者中观察到类似的中性粒细胞生物学,证实了失调的颗粒形成.

结论:

与AML相关的炎症显著改变了中性粒细胞的颗粒形成和功能.
功能失调,不成熟的中性粒细胞有助于AML的免疫抑制环境.
这些发现提供了关于AML患者感染易感性增加的见解.

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