干扰素的对立功能协调适应性和先天性免疫反应对癌症免疫检查点的阻塞
Joseph L Benci1, Lexus R Johnson2, Ruth Choa3
1Department of Radiation Oncology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
干扰素- (IFNG) 在癌症免疫力方面具有相反的作用. 阻断瘤IFNG信号增强免疫细胞反应,促进瘤排斥,影响免疫检查点阻断 (ICB) 的有效性.
科学领域:
- 免疫学
- 癌症生物学
- 分子生物学
背景情况:
- 干扰素- (IFNG) 增强免疫功能,但也通过PDL1诱导T细胞耗尽.
- 这些IFNG对抗作用对抗瘤免疫和免疫检查点阻塞 (ICB) 的整合尚未完全理解.
研究的目的:
- 阐明IFNG信号在癌细胞和免疫细胞中如何集成以调节抗瘤免疫力.
- 研究IFNG信号调节对免疫细胞功能和瘤排斥的影响.
主要方法:
- 在IFNG信号抑制的癌症和免疫细胞中分析干扰素刺激基因 (ISG).
- 在瘤中T细胞耗尽 (TEX) 和先天免疫细胞群 (ILC1s) 的特征.
- 在具有不同抗原性和MHC-I状态的模型中评估瘤排斥.
- 在黑色素瘤和肺癌患者中,IFNG信号干扰与ICB反应的相关性分析.
主要成果:
- 抑制瘤IFNG信号会降低癌细胞中的ISG,但会增加免疫细胞中的ISG,由TEX产生的IFNG驱动.
- 在抗原丰富的瘤中,TEX细胞调解瘤排斥.
- 在新抗原或MHC-I损失的瘤中,TEX衍生IFNG促进先天免疫细胞成熟,包括PD1+TRAIL+ ILC1s.
- 阻断瘤IFNG信号通过禁用涉及PD1和TRAIL的抑制电路来增强先天免疫杀伤.
结论:
- 在癌症和免疫细胞中,干扰素信号建立了相反的调节关系,限制了适应性和先天性抗瘤免疫反应.
- 在黑色素瘤和肺癌患者中,无论瘤的突变负担如何,扰乱这种调节关系都与ICB反应的改善有关.
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