在HPV抗原表达状细胞癌 (SCC) 模型中,不同瘤免疫微环境与瘤进展或瘤根除相结合
Arpitha H Shivarudrappa1, Jessy John1, Monika Vashisht1
1University of Pittsburgh Medical Center UPMC Hillman Cancer Center, Division of Hematology and Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States.
Frontiers in immunology
|July 26, 2024
概括
人类乳头瘤病毒 (HPV) 导致头癌. 研究人员发现,HPV表达性瘤会引发不同的免疫反应,其中一些被完全根除,而另一些则生长,揭示了瘤免疫力的关键差异.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 病毒学 病毒学
背景情况:
- 人类乳头瘤病毒 (HPV) 是已知的头部和部状细胞癌 (HNSCC) 的原因之一.
- 了解HPV抗原和抗瘤免疫之间的相互作用对于开发有效的癌症疗法至关重要.
- 现有研究强调了瘤微环境 (TME) 在调节对癌症的免疫反应方面的复杂性.
研究的目的:
- 研究HPV抗原在塑造抗瘤免疫反应中的作用.
- 建立和表征与HPV相关的HNSCC与不同的免疫结果的小鼠模型.
- 确定与瘤根除相对应的免疫TME的差异与逐步生长.
主要方法:
- 通过在状细胞癌细胞系中表达HPV16 E6和E7抗原,建立了小鼠模型.
- 利用流细胞测量来分析瘤微环境中的免疫细胞群和激活标志物.
- 采用DNA测序来检查T细胞受体多样性,并识别瘤系中的体质突变.
主要成果:
- 两种HPV抗原表达克隆 (C-225和C-100) 显示出不同的结果:C-225被消灭,而C-100逐渐增长.
- 增长中的瘤 (C-100) 的CD8和CD4瘤透性淋巴细胞 (TIL) 的百分比较高,但显示上调的疲劳标志物 (PD-1,LAG-3) 和受损的效应器功能.
- 根除的瘤 (C-225) 富含髓状细胞,包括多态核核髓状细胞衍生抑制细胞 (PMN-MDSC),而生长的瘤 (C-100) 具有更多的单细胞MDSC和M2-偏离的瘤相关巨细胞 (TAM).
结论:
- 不同的免疫TME概况是HPV相关的HNSCC中不同抗瘤免疫结果的基础.
- 该研究确定了与瘤根除与进展相关的不同免疫细胞组成和功能状态.
- 这些实验模型为探索影响免疫抑制的瘤内在和宿主内在因素以及在HNSCC中识别新的治疗点提供了一个平台.
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