拉格3和PD-1通路在早期CD4+ T细胞激活期间优先调节NFAT依赖的TCR信号程序
Lozan Sheriff1, Alastair Copland1, David A J Lecky1
1Department of Immunology and Immunotherapy, School of Infection, Inflammation and Immunology, College of Medicine and Health, University of Birmingham, Birmingham B15 2TT, United Kingdom.
Lag3和PD-1免疫检查点对早期CD4+T细胞激活进行控制. 组合阻塞增强了依赖NFAT的基因表达和T细胞受体信号持续时间,对免疫治疗具有翻译意义.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 癌症免疫疗法癌症免疫疗法
背景情况:
- 拉格3和PD-1是调节T细胞反应的关键免疫检查点,是癌症免疫治疗的关键标.
- 通过Lag3和PD-1控制CD4+T细胞激活早期阶段的精确机制仍然不完全理解.
研究的目的:
- 阐明Lag3和PD-1在调节早期CD4+T细胞激活中的不同和联合作用.
- 调查分子通路,包括NFAT信号传递,受 PD-1 和 Lag3 结合阻塞的影响.
主要方法:
- RNA测序用于分析结合阻塞后CD4+T细胞的转录变化.
- 抑制NFAT通路,以评估其在调节基因表达和T细胞激活中的作用.
- 从接受组合治疗的患者中分析T细胞受体信号持续时间和人类CD4+T细胞的表型变化.
主要成果:
- 结合PD-1和Lag3阻塞 (CB) 证明了分层控制,PD-1联合阻塞放大了Lag3效应.
- CB诱导了早期的NFAT依赖的转录特征,促进了T毛囊辅助细胞的分化.
- 添加调节的Lag3和PD-1T细胞受体信号持续时间和NFAT依赖基因表达,包括ICOS和OX40.
结论:
- 在早期CD4+T细胞重新激活过程中,PD-1和Lag3通路汇聚在一起,以增加调节TCR信号持续时间.
- 这些途径优先控制NFAT依赖的转录活性,为组合免疫疗法策略提供了洞察力.
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