CBX3对抗IFNγ/STAT1/PD-L1轴以调节结肠炎症和CRC化学敏感性
Yao Xiang1, Jorge Mata-Garrido1, Yuanji Fu1
1Université Paris Cité, INSERM, CNRS, Institut Necker Enfants Malades, F-75015, Paris, France.
EMBO molecular medicine
|April 29, 2024
概括
表观遗传调节器CBX3通过抑制STAT1和PD-L1.1,抑制结肠中的干扰素- (IFNγ) 信号传递. 删除CBX3会引起炎症,并增强结肠直肠癌 (CRC) 对IFNγ和化疗的敏感性.
科学领域:
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 胃肠病学 胃肠病学
背景情况:
- 干扰素- (IFNγ) 对肠道平衡至关重要,但其失调与结肠炎和结肠直肠癌 (CRC) 等结肠病理有关.
- 在结肠炎症和CRC中表观遗传调节器CBX3 (HP1γ) 的作用尚不清楚.
研究的目的:
- 研究CBX3在调节结肠表皮中的IFNγ信号传递中的作用.
- 确定CBX3对结肠炎症和CRC化疗耐药性的影响.
主要方法:
- 研究了CBX3对IFNγ响应基因STAT1和CD274 (PD-L1) 在结肠上皮细胞中的作用.
- 利用CBX3删除小鼠模型进行结肠炎症研究.
- 采用染色体免疫沉来评估CBX3与基因促进体的结合.
- 评估了CRC细胞和瘤模型对IFNγ和化疗的敏感性.
主要成果:
- 在转录过程中,CBX3抑制了STAT1和CD274 (PD-L1),这是IFNγ反应的关键基因.
- 删除CBX3会导致慢性结肠炎症,增加STAT1和CD274的表达.
- IFNγ减少了CBX3与STAT1和CD274促进体的结合,从而启动基因表达.
- 删除CBX3增强CRC细胞对IFNγ的敏感性,改善化疗结果在体外和体内.
结论:
- 通过抑制STAT1和PD-L1.1,CBX3在结肠上皮质中作用为IFNγ信号的对手,抑制STAT1和PD-L1.
- CBX3在调节结肠炎症反应和CRC化疗耐药性方面发挥作用.
- 准CBX3可能是增强基于IFNγ治疗CRC的一种策略.
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