在非小细胞肺癌中,PD-L1表达的调节由白蛋白-1β调节
Aiko Hirayama1, Kentaro Tanaka1, Hirono Tsutsumi1
1Department of Respiratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Frontiers in immunology
|July 13, 2023
概括
介质素-1β (IL-1β) 和干扰素-γ (IFN-γ) 通过MAPK信号传递,在非小细胞肺癌 (NSCLC) 中协同增加编程细胞死亡连接体1 (PD-L1) 的表达. 准IL-1β-MAPK轴可能会增强抗瘤免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 编程细胞死亡配体1 (PD-L1) 是预测癌症对免疫检查点抑制剂反应的关键生物标志物.
- 细胞因子 (例如IL-1β) 在瘤细胞PD-L1表达中的调节作用尚未完全理解.
- 非小细胞肺癌 (NSCLC) 是一种主要的癌症类型,PD-L1表达影响治疗疗效.
研究的目的:
- 研究IL-1β在调节NSCLC中PD-L1表达中的作用.
- 阐明 IL-1β 诱导的 PD-L1 表达的基础分子机制.
- 确定在NSCLC中调节PD-L1表达的潜在治疗点.
主要方法:
- 使用单细胞RNA测序数据对NSCLC瘤组织中细胞因子基因表达的全面查.
- 在体外实验检查IL-1β对NSCLC细胞系PD-L1诱导的影响.
- 对基激活蛋白激酶 (MAPK) 信号通路和转录因子与PD-L1促进体结合的分析.
主要成果:
- 在NSCLC的瘤微环境中IL-1β的表达很高,特别是在巨细胞中.
- 联合IL-1β和干扰素-γ (IFN-γ) 治疗协同增加了NSCLC细胞中的PD-L1表达.
- IL-1β和IFN-γ激活了MAPK信号,促进转录因子与PD-L1促进体结合;MAPK抑制剂阻止了这种效应.
结论:
- 瘤微环境中的高IL-1β水平可以与IFN-γ合作,最大限度地提高NSCLC细胞中的PD-L1表达.
- IL-1β-MAPK信号轴是PD-L1上调的一个关键途径.
- 准IL-1β-MAPK轴是一种有前途的治疗策略,可以克服PD-L1介导的免疫抑制并增强抗瘤免疫力.
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