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CD27激动性增强了长期存在的CD4 T细胞疫苗反应,对抗瘤免疫力至关重要

Bin-Jin Hwang¹, Erika J Crosby^1,2, David T Severson¹

¹Department of Surgery, Duke University, Durham, NC, USA.

Science immunology

|December 19, 2025

概括

CD27激素增强HER2癌症疫苗,通过增强长寿CD4T细胞,导致显著的瘤回归和持久的抗瘤免疫力.

科学领域:

免疫学免疫学免疫学
在瘤学瘤学.
疫苗学疫苗学疫苗学

背景情况:

瘤抗原疫苗接种对癌症治疗有希望,但尚未成为标准护理.
了解疫苗的长期疗效对于改善癌症免疫疗法至关重要.
人类表皮生长受体2 (HER2) 是乳腺癌疫苗的目标.

研究的目的:

研究接受HER2向疫苗的患者长期免疫记忆背后的机制.
评估在临床前模型中将HER2疫苗接种与CD27激动症结合的疗效.
确定负责持久抗瘤反应的关键细胞成分.

主要方法:

对接受了HER2疫苗的HER2-阳性乳腺癌患者的回顾性分析.
周围血液单核细胞 (PBMC) 分析以确定特定的T细胞种群.
在人类CD27转基因小鼠中进行的研究涉及HER2疫苗接种和抗CD27激素.
在小鼠模型中评估瘤回归.
单细胞RNA测序 (scRNA-seq) 和T细胞枯竭/收养转移实验.

主要成果:

在长期幸存者中检测到HER2特定的CD27表达记忆CD4和CD8T细胞.
结合HER2疫苗接种和抗CD27激素作用显著增强了小鼠的HER2特异性T细胞反应.
组合疗法导致大约40%的瘤回归在小鼠模型中,与仅使用疫苗的~6%相比.
确定了具有独特基因表达特征的CD4 T细胞,并证实它们对治疗效果至关重要.

结论:

在瘤疫苗接种后,CD27信号传递对于建立和维护长期免疫记忆很重要.
CD27激动性可以强化疫苗诱导的抗原特异性CD4 T细胞反应.
这种方法可以带来持久的抗瘤免疫力,CD4 T 细胞,而不仅仅是CD8 T 细胞发挥着重要作用.

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