预免疫疗法改变了早期NSCLC的刻板体除性放射疗法诱导的全身T细胞反应
Chao Liu1, Yanjuan Chen2, Xiaohui Li3
1Department of Radiation Oncology, Peking University First Hospital, Beijing, 100034, China.
Cancer immunology, immunotherapy : CII
|February 1, 2025
概括
立体除性放射治疗 (SABR) 在非小细胞肺癌 (NSCLC) 患者中激活了不同的T细胞反应. 将SABR与免疫疗法/化疗相结合,可以逆转这些T细胞模式,影响瘤根除的治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 辐射疗法 辐射疗法
背景情况:
- 立体性除性放射疗法 (SABR) 正在研究其在癌症患者中激活T细胞反应的潜力.
- 在非小细胞肺癌 (NSCLC) 治疗中,SABR与免疫疗法和化疗相结合.
- 了解系统性T细胞对SABR的反应,有或没有先前治疗,至关重要.
研究的目的:
- 在SABR之后,对全身T细胞反应进行高分辨率的转录基因分析.
- 为了分析NSCLC患者的T细胞反应,仅用SABR治疗与SABR与免疫治疗/化疗 (icSABR) 结合治疗.
主要方法:
- 单细胞RNA和T细胞受体 (TCR) 测序来自七名早期NSCLC患者外周血液中的T细胞.
- 在SABR前和之后采样,有或没有先前的免疫疗法和化疗 (icSABR).
- 使用流细胞计,单细胞RNA-seq和批量RNA-seq数据进行验证.
主要成果:
- 在终端效应细胞CD8+ T细胞中,SABR增加了细胞毒性和抑制性得分,而icSABR显示了反向反应.
- SABR治疗导致大T细胞克隆的增加和单个克隆的减少,而icSABR显示相反的效果.
- SABR和icSABR都改变了TCR克隆类型;SABR主要涉及来自CD8+T细胞的大克隆,而icSABR涉及来自T辅助细胞的单个克隆.
结论:
- 这些发现揭示了SABR和免疫疗法在调节全身T细胞反应中的复杂相互作用.
- 由SABR和icSABR诱导的独特的T细胞模式对NSCLC治疗策略有潜在的有价值的影响.
- 优化涉及SABR和免疫治疗的组合疗法可能会增强全身T细胞对瘤根除的反应.
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