ICOS+CD4+ T细胞定义了对抗PD-1疗法诱导的肺病原发生的高度敏感性
Mari Yokoi1,2, Kosaku Murakami1, Tomonori Yaguchi3
1Division of Clinical Immunology and Cancer Immunotherapy, Center for Cancer Immunotherapy and Immunobiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
JCI insight
|April 8, 2025
概括
衰老通过激活特定的T细胞,加剧了癌症免疫疗法的肺毒性. 针对ICOS途径可以预防这些与免疫相关的不良事件在老年患者.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 老年学是一门学科.
背景情况:
- 癌症免疫疗法,特别是抗PD-(L) 1疗法,正在彻底改变癌症治疗.
- 免疫相关不良事件 (irAEs) 是常见的副作用,其机制,特别是器官毒性,尚未完全理解.
- 衰老对IRAE发展的影响仍然是一个需要进一步研究的领域.
研究的目的:
- 调查慢性衰老在抗PD-(L) 1疗法诱导的肺毒性中的作用.
- 阐明老年小鼠的irAE类肺病理的细胞和分子机制.
- 探索在老年癌症患者中管理IRAE的潜在治疗点.
主要方法:
- 利用携带瘤的老老鼠模型研究抗PD-(L) 1疗法诱导的肺毒性.
- 雇佣收养T细胞转移实验,以评估老年肺衍生的CD4+T细胞的贡献.
- 在肺透细胞上进行单细胞转录组学,并研究了ICOS-ICOSL相互作用.
- 在接受免疫治疗的人类癌症患者中,与ICOS表达相关的发现.
主要成果:
- 抗PD-(L) 1疗法诱导了异胎免疫细胞透和抗体沉积在老年小鼠的肺部,但不是年轻小鼠.
- 致病性CD4+T细胞和老化的宿主环境对于irAE的发展都至关重要.
- 单细胞分析揭示了老年小鼠的ICOS+CD4+T细胞激活,驱动生殖中心B细胞分化和肺损伤.
- 干扰ICOS-ICOSL相互作用或给予IL-21调节了这些反应.
- 老鼠中CD4+T细胞上ICOS表达的增加与人类患者中irAE发生率相关.
结论:
- 慢性衰老通过ICOS+CD4+T细胞激活在老化的免疫环境中加剧了抗PD-(L) 1疗法诱导的肺毒性.
- ICOS-ICOSL通路是irAE类肺病理学的关键调解者.
- 这些发现强调了在irAE管理中考虑年龄的重要性,并建议将ICOS途径作为老年患者潜在的治疗策略.
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