透到肺瘤的Treg具有与检查点阻塞反应相关的不同的转录形状和功能
Arbor G Dykema1,2,3, Jiajia Zhang1,2,3, Laurene S Cheung1,3
1Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins School of Medicine, Baltimore, MD, USA.
Science immunology
|September 15, 2023
概括
调控性T细胞 (Treg) 子集在非小细胞肺癌的抗PD-1疗法中具有相反的作用. 虽然一些Treg抑制免疫力,但TAA特定的Treg可能会增强抗瘤反应.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 单细胞基因组学 单细胞基因组学
背景情况:
- 调节性T细胞 (Treg) 传统上被视为抗瘤免疫的抑制剂.
- 在调节对免疫检查点阻塞 (ICB) 的反应中Treg的具体作用尚不清楚.
- 非小细胞肺癌 (NSCLC) 治疗包括ICB疗法,如抗PD-1.
研究的目的:
- 研究NSCLC中瘤透Treg (TIL-Treg) 的异质性和功能.
- 确定特异性Treg子集对抗PD-1治疗的反应中的作用.
- 探索瘤相关抗原 (TAA) 特定Treg在抗瘤免疫中的潜力.
主要方法:
- 综合单细胞RNA-seq和TCRseq对来自NSCLC患者的73,000人TIL-Treg (接受抗PD-1治疗和原始治疗).
- 从小鼠瘤模型中对TAA特异性Treg进行单细胞分析.
- 计算转移学习将鼠Treg签名映射到人类数据集上.
主要成果:
- 确定了10个不同的人类TIL-Treg子集,与小鼠子集高度一致.
- 一个特定的OX40高GITR高Treg亚组表现出强大的抑制功能,与抗PD-1治疗的耐药性相关.
- 在采用类似T助手1 (TH1) 类表型的小鼠中发现了TAA特异性Treg的子集,降低了FoxP3的调节,并提高了IFNG和Tbet的调节.
- 类似于TH1的Treg子集群在响应抗PD-1治疗的人类瘤中得到了丰富.
结论:
- 在转录方面,TIL-Treg具有多样性,其中子集对ICB疗效表现出相反的影响.
- 抑制性OX40高GITR高Treg亚组可能会限制NSCLC中抗PD-1治疗反应.
- 特定于TAA的Treg可以获得一种类似TH1的亲炎性表型,可能对抗瘤免疫力作出积极贡献.
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