在头癌中,功能性HPV特异性PD-1+干状CD8T细胞
Christiane S Eberhardt1,2,3,4, Haydn T Kissick1,2,5,6, Mihir R Patel5,7
1Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA.
Nature
|September 2, 2021
概括
研究人员在头癌中发现了不同的人类乳头瘤病毒 (HPV) 特定的CD8T细胞子集. 功能性干细胞T细胞表明可能用于PD-1阻断疗法和更广泛的HPV疫苗抗原标.
科学领域:
- 免疫学
- 癌症学
- 病毒学
背景情况:
- 对抗瘤免疫力至关重要,但它们在人类癌症中的分化需要进一步研究.
- 了解抗原特异性T细胞反应是开发有效癌症免疫疗法的关键.
研究的目的:
- 在HPV阳性头癌中研究人类乳头瘤病毒 (HPV) 特定的CD8T细胞的分化和功能.
- 确定增强抗瘤免疫力的潜在治疗点.
主要方法:
- 主要组织相容性复合体 (MHC) 类I四色素染色以识别HPV特异性CD8T细胞.
- 单细胞RNA测序用于分析T细胞的转录特征.
- 在体外刺激测试以评估T细胞的增殖和分化.
主要成果:
- 鉴定出了三种不同的HPV特异性CD8T细胞子组:类似干细胞的,过渡性的和终端分化的.
- 干细胞类的HPV特异性CD8T细胞表达PD-1和TCF7,保持增殖能力,并在刺激时分化为效应细胞.
- 终端分化的细胞表现出有限的增殖,表明T细胞反应的等级.
结论:
- 在HPV阳性头癌中存在HPV特异性PD- 1+ TCF- 1+类干细胞,支持PD- 1阻断疗法.
- 包括HPV E2和E5蛋白作为疫苗抗原可能会扩大CD8T细胞的反应,从而增强瘤免疫力.
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