TGFβ特异性T细胞的抗瘤活性取决于IL-6信号传递
Maria Perez-Penco1, Mikkel Byrdal1, Lucia Lara de la Torre1
1National Center for Cancer Immune Therapy (CCIT-DK), Department of Oncology, Copenhagen University Hospital, Herlev, Denmark.
Cellular & molecular immunology
|December 9, 2024
概括
干白素-6 (IL-6) 对于TGFβ特异性T细胞在胰腺癌 (PC) 免疫治疗中的有效性至关重要. 用抗体阻止IL-6受体 (IL-6R) 可以阻碍抗瘤免疫力并降低治疗效率.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症研究 癌症研究
背景情况:
- 介质素-6 (IL-6) 在癌症中起着复杂的作用,新出现的证据表明,它可以支持抗瘤免疫力,尽管传统上被认为是免疫抑制剂.
- 免疫检查点抑制剂 (ICI) 与放射治疗相结合在胰腺癌 (PC) 中表现有前途,但添加IL-6受体 (IL-6R) 阻塞并没有改善结果.
- 针对TGFβ的免疫反应与接受ICI和放射治疗的PC患者的更好的生存率有关,基于TGFβ的疫苗显示出临床前的疗效.
研究的目的:
- 在胰腺癌 (PC) 的背景下,研究IL-6在调解TGFβ特异性免疫力中的作用.
- 评估IL-6受体 (IL-6R) 阻断对基于TGFβ的免疫调节疫苗在小鼠PC模型中的疗效的影响.
- 评估IL-6R阻断对TGFβ特异性T细胞反应和PC患者存活时间的影响的临床相关性.
主要方法:
- 利用胰腺癌 (PC) 的小鼠模型来评估基于TGFβ的免疫调节疫苗与抗IL-6受体 (IL-6R) 抗体的同时使用.
- 分析了疫苗诱导的T细胞发育,瘤T细胞透和髓状细胞群,包括与瘤相关的巨细胞.
- 在接受ICI,放射治疗和IL-6R阻塞的PC患者中进行了周围血液免疫类型鉴定,以评估T细胞和单细胞变化.
主要成果:
- 在小鼠PC模型中,将基于TGFβ的疫苗与IL-6R封锁结合在一起,使得疫苗无效,损害T细胞反应,增加免疫抑制性髓状细胞.
- 在小鼠中的IL-6R阻塞导致了疫苗诱导的T细胞发育的减少,瘤T细胞透的减少,以及免疫抑制性瘤相关巨细胞的增强透.
- 在PC患者中,在基线时强大的TGFβ特异性T细胞反应与在IL-6R阻塞与ICI和放射治疗一起进行治疗时的生存率改善无关,与没有IL-6R阻塞的患者不同.
结论:
- 在胰腺癌 (PC) 中,TGFβ特异性T细胞的抗瘤疗效取决于瘤微环境中IL-6的存在.
- IL-6受体 (IL-6R) 的阻塞会破坏T细胞和骨髓状细胞区,损害关键的抗瘤免疫细胞的发育和功能.
- 建议在使用IL-6R阻塞与癌症免疫疗法 (如ICI和放射治疗) 结合使用时谨慎使用,特别是在胰腺癌中,因为可能会损害有益的免疫反应.
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