疫苗接种产生功能性原始瘤特异性CD8 T细胞和长期瘤控制
Carlos R Detrés Román1, Megan M Erwin2, Michael W Rudloff2
1Cancer Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
Journal for immunotherapy of cancer
|October 3, 2024
概括
癌症疫苗通过产生功能性原始瘤特异性CD8 T细胞 (TST) 有效地阻止了肝癌的进展. 在这个模型中,免疫检查点封锁 (ICB) 并没有减缓癌症的进展,也没有提高疫苗的疗效.
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:
- 免疫检查点阻塞 (ICB) 为一些晚期癌症患者提供了持久的缓解,但疗效不同.
- 癌症疫苗有望促进免疫反应,并实现长期的瘤免疫重编程.
- 了解免疫如何影响癌症进展对于开发有效疗法至关重要.
研究的目的:
- 在临床前肝癌模型中研究免疫治疗对瘤特异性CD8T细胞 (TST) 的影响.
- 为了比较癌症疫苗接种和ICB在阻止癌症进展方面的有效性.
- 为了确定免疫能否诱导长期的瘤免疫重编程.
主要方法:
- 开发了一种偶发性肝癌的遗传小鼠模型.
- 评估TST免疫类型和功能在早期和晚期病变中使用流细胞计.
- 服用癌症疫苗 (LMTAG) 和/或ICB以评估对癌症进展和生存的影响.
主要成果:
- 早期病变的TST是PD1+TCF1+TOX-,产生IFNγ;晚期病变的TST是PD1+TCF1lo/-TOX+,缺乏效应器功能.
- 用LMTAG接种疫苗阻止了肝癌的发展,并产生了多功能,自我更新的原始TST (PD1-异质,TCF1+TOX-).
- ICB并没有减缓癌症的进展,也没有提高疫苗的疗效.
结论:
- 与ICB不同的是,癌症疫苗接种产生了功能性原始TST,并在相关的临床前模型中停止了零星的肝癌进展.
- 免疫可能是患有早期癌症或复发高风险的患者最有效的策略.
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