骨髓瘤微环境分析预测了AML患者独特的免疫抑制表型和免疫治疗潜力
Leslie Correia da Cruz1, Yejin Lee2, Ji Yeon Paik2
1Laboratoire de Biologie Moléculaire du Cancer, BAM3 Pavillon 2, 6A rue Nicolas-Ernest Barblé, Luxembourg L-1210, Luxembourg.
概括
研究人员在急性髓性白血病 (AML) 中确定了两个不同的免疫微环境. 一个是富含T细胞但功能障碍的,而另一个是免疫抑制,指导未来的AML免疫疗法.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 在瘤学瘤学.
背景情况:
- 急性髓性白血病 (AML) 的免疫微环境是复杂的,人们对其了解甚少.
- 在AML中区分病态和免疫调节成分是具有挑战性的,因为它是髓状的起源.
研究的目的:
- 完善AML微环境 (AME) 的分类.
- 识别与AML血统和成熟阶段相关的独特免疫类型.
- 开发和验证多基因标记物,以根据其免疫特征对AML亚型进行分类.
主要方法:
- 开发并验证了13基因 (巨核细胞/红色球体 - MK/Ery) 和16基因 (骨髓单细胞/单细胞 - ML/Mo) 的多基因标记物.
- 利用xCell算法进行AME组成预测和TIDE用于免疫功能障碍计算.
- 进行了AML细胞系和CD8+T细胞的共同培养试验,并分析了转录组和单细胞RNA测序数据.
主要成果:
- 确定了两种不同的AME:MK/EryHigh AML表现出一种功能障碍的T细胞透的微环境,具有上调的免疫检查点 (例如PD-L1).
- ML/MoHigh AML 呈现出 T 细胞枯竭的利基,其中含有像 M2 巨细胞和胆蛋白等髓状细胞衍生抑制元素.
- 在试验室中,MK/Ery样和ML/Mo样AML细胞都抑制了T细胞的增殖;在一个模型中,PD-1/PD-L1阻断部分恢复了T细胞的功能.
结论:
- 精细的AMEE被分为两种不同的亚型:富含T细胞但功能障碍的,以及骨髓驱动和免疫抑制的.
- 这些发现提供了一个比传统的AML冷热分类更细致的方法.
- 这种精细的分类可以指导针对AML患者的定制免疫疗法的开发.
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