新抗原特异性干细胞记忆类CD4+ T细胞介导CD8+ T细胞依赖免疫疗法MHCII类阴性固体瘤的T细胞
Spencer E Brightman1,2, Angelica Becker1, Rukman R Thota1
1Division of Developmental Immunology, La Jolla Institute for Immunology, La Jolla, CA, USA.
Nature immunology
|July 3, 2023
概括
新抗原特异性CD4+ T细胞通过帮助CD8+ T细胞来帮助抗瘤免疫力. 使用类似CD4+T细胞的T干细胞记忆的采用细胞疗法显示出治疗的前景.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症免疫学 癌症免疫学
- T细胞生物学T细胞生物学
背景情况:
- CD4+ T 细胞对免疫反应至关重要,但它们在癌症免疫力中的作用,特别是对抗新抗原的作用,比CD8+ T 细胞了解得更少.
- 新抗原 (NeoAg) 特定的CD8+ T细胞在癌症中得到了很好的研究,但NeoAg特定的CD4+ T细胞的功能仍然是一个需要进一步研究的领域.
研究的目的:
- 在状细胞癌模型中,描述小鼠CD4+T细胞对特定新抗原 (CLTCH129>Q) 的反应.
- 评估NeoAg特异性CD4+ T细胞在采用细胞疗法 (ACT) 中的治疗潜力.
主要方法:
- 对CD4+T细胞反应的单T细胞受体 (TCR) 克隆型分析.
- 测试测试和CD4依赖测试,以测量TCR热情度.
- 在体内增殖测定和治疗免疫力的评估.
- 使用不同的细胞因子 (IL-7/IL-15与IL-2) 进行TCR工程CD4+T细胞的ex vivo分化.
- 在瘤微环境和瘤排水淋巴结中分析CD8+T细胞表型 (PD-1表达).
主要成果:
- 自然的CLTCH129>Q特异性的CD4+T细胞谱系是多样化的,具有不同的TCR嗜好.
- 具有高或中等激发性TCR的CD4+T细胞促进了依赖CD8+T细胞和CD40L信号的抗瘤免疫力.
- 与IL-2相比,与IL-7和IL-15的体外分化增强了CD4+T细胞的扩张,并产生了T干细胞记忆 (TSCM) 样细胞.
- 使用类似TSCM的CD4+T细胞进行ACT,可以降低瘤内的CD8+T细胞的PD-1表达,但可以增加瘤排水淋巴结中的PD-1+CD8+T细胞.
结论:
- 新抗原特异性CD4+ T细胞为CD8+ T细胞提供必要的帮助,以有效的抗瘤免疫力.
- 优化CD4+T细胞对ACT的分化,特别是对TSCM类表型的优化,可以提高治疗疗效.
- 这些发现强调了NeoAg特异性CD4+ T细胞在癌症免疫治疗中的显著治疗潜力.
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