破坏DNA的毒剂通过Src-STAT1-IRF1路径诱导PD-L1的表达.
Yuri Suzuki1, Soshi Nishibu1, Akihiro Nohara1
1Department of Cancer Cell Biology, Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
Biological & pharmaceutical bulletin
|December 24, 2025
概括
化学疗法药物,如SN-38和西斯普拉丁,通过一个独立于JAK的途径,通过编程的细胞死亡配体1 (PD-L1) 表达. 这一发现可能会提高免疫检查点抑制剂 (ICI) 在各种癌症中的有效性.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 免疫检查点抑制剂 (ICI) 在癌症治疗中表现有前途,但面临抗药性.
- 下调的编程细胞死亡配体1 (PD-L1) 表达,通常是由于受损的简氏激酶1/2 (JAK1/2) 信号传递,是关键的抵抗机制.
- 发现JAK独立的增强PD-L1的途径对于改善ICI治疗至关重要.
研究的目的:
- 调查可以调节PD-L1表达的替代信号通路,独立于JAK1/2.2.
- 确定化疗剂是否可以恢复抗ICI耐药癌症中的PD-L1表达.
- 通过新的治疗策略,探索增强ICI疗效的潜力.
主要方法:
- 使用了黑色素瘤细胞系A2058和多个癌症细胞系.
- 使用的化疗剂SN-38和西斯.
- 分析了干扰素调节因子1 (IRF1) 和PD-L1.1的表达.
- 研究了JAK1/2,信号转换器和转录1 (STAT1),Src氨酸激酶和IRF1激活器在PD-L1调节中的作用.
主要成果:
- 在A2058黑色素瘤细胞中,SN-38和思柏林显著上调了IRF1和PD-L1的表达.
- 这种诱导是独立于JAK,但依赖于STAT1.
- STAT1的激活是由Src氨酸激酶调解的.
- 在各种癌症类型中,SN-38在调节PD-L1上升方面表现出有效性.
结论:
- 破坏DNA的化疗剂激活Src-STAT1-IRF1信号轴,以增强PD-L1的表达.
- 这一途径提供了一种潜在的策略,以克服瘤中ICI抵抗的缺陷JAK信号传递.
- 针对这一轴可以提高ICI在更广泛的患者群体中的临床疗效.
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