由TNF和IFNγ诱导的细胞死亡需要IRF1和ELAVL1来促进CASP8表达
Buhao Deng1, Jingyi Wang1, Tingyun Yang1
1State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
The Journal of cell biology
|February 6, 2024
概括
干扰素- (IFNγ) 和瘤坏死因子-α (TNFα) 通过通过IRF1.1.上调CASP8和CYLD来触发癌细胞死亡. ELAVL1稳定了CASP8mRNA,增强了这种细胞死亡途径.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 瘤坏死因子-阿尔法 (TNFα) 和干扰因子- (IFNγ) 协同诱导癌细胞死亡.
- 通过IFNγ增强TNFα介导的癌细胞中caspase-8激活的确切机制尚不清楚.
研究的目的:
- 阐明IFNγ在TNFα启动的caspase-8激活和癌细胞死亡中的作用.
- 确定参与这一过程的关键分子参与者和监管机制.
主要方法:
- 对CASP8和CYLD的转录分析.
- 对干扰素调节因子1 (IRF1) 功能的研究.
- 基因查以确定酶-8激活所需的因素.
- 使用ELAVL1 (HuR) 进行RNA结合蛋白分析.
主要成果:
- IFNγ通过转录因子IRF1对CASP8和CYLD进行升级调节,从而对癌细胞死亡做出增加性贡献.
- 通过稳定CASP8mRNA,ELAVL1 (HuR) 对于TNF/IFNγ诱导的caspase-8激活至关重要.
- 高水平的TNF,IFNγ,CYLD和CASP8与黑色素瘤患者对抗PD-1免疫疗法的反应相关.
结论:
- 通过IRF1-介导的CASP8和CYLD的上调调节,IFNγ在增强TNFα诱导的癌细胞死亡方面发挥着关键作用.
- ELAVL1是卡斯巴-8稳定性和功能的关键调节者,影响死亡受体介导的亡.
- 这些发现为瘤免疫疗法和炎症疾病的调节提供了洞察力.
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