在用检查点抑制治疗的瘤中,新抗原和免疫细胞之间的相互作用
Irantzu Anzar1,2, Brandon Malone1, Pubudu Samarakoon1
1Oslo Cancer Cluster, NEC OncoImmunity AS, Oslo, Norway.
Frontiers in immunology
|October 6, 2023
概括
免疫检查点抑制 (ICI) 在肉瘤中表现出适度的疗效. 在瘤微环境 (TME) 中,高质量的新抗原和特定的免疫细胞,如CD8+ T细胞,预测ICI治疗的肉瘤患者的无进展生存率 (PFS) 更好.
科学领域:
- 在瘤学瘤学.
- 免疫治疗是一种免疫疗法.
- 癌症基因组学 癌症基因组学
背景情况:
- 瘤,各种连接组织瘤,对于晚期疾病的治疗选择有限.
- 免疫疗法,特别是免疫检查点抑制 (ICI),在许多肉瘤亚型中提供了潜力,但显示出适度的疗效.
研究的目的:
- 调查与抗性相关的免疫参数或在肉瘤中逃避ICI治疗.
- 在接受ICI治疗的肉瘤患者中,确定改善无进展生存 (PFS) 的预测生物标志物.
主要方法:
- 整体外体序列 (WES) 和RNA-seq在瘤上进行,并匹配了31名接受 pembrolizumab 治疗的肉瘤患者的血液.
- 计算分析的重点是瘤微环境 (TME) 中的新抗原质量和免疫细胞组成.
主要成果:
- 高质量的新抗原和特异性免疫细胞透 (T细胞,B细胞,巨细胞) 在TME中是PFS的关键预后标志物.
- 与单独的任何一个因素相比,CD8+ T 细胞和新抗原的联合存在显著改善了生存率.
- 在CD8+ T细胞和瘤突变负担 (TMB) 之间没有观察到这种协同效应,这凸显了新抗原质量的重要性.
结论:
- 了解新抗原和免疫细胞之间的相互作用,可以为提高ICI在肉瘤中的疗效制定策略.
- 未来的临床试验可以利用这些发现来改善接受免疫治疗的肉瘤患者的治疗结果.
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