瘤NLRP3放大通过抑制MHC I类表达促进免疫疗法抵抗
medRxiv : the preprint server for health sciences
|November 24, 2025
概括
NLRP3炎症酶途径通过抑制MHC I类表达来驱动免疫疗法抵抗. 抑制NLRP3可以恢复抗瘤免疫力,并在临床前癌症模型中克服耐药性.
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:
- 免疫疗法耐药性是癌症治疗中的一个重大障碍.
- NLRP3炎症酶通路已与适应性免疫疗法耐药性有关.
- 瘤内在的NLRP3信号促进了免疫抑制细胞的招募.
研究的目的:
- 研究瘤NLRP3炎症酶信号在免疫疗法耐药性中的作用.
- 探索NLRP3作为一种潜在的治疗标和克服抗性的生物标志物.
- 阐明NLRP3影响抗瘤免疫力的分子机制.
主要方法:
- 对NLRP3信号活动与黑色素瘤和胃食道腺癌患者的临床结果的相关性分析.
- 在现场杂交和空间转录组分析以评估NLRP3表达和信号.
- 使用黑色素瘤和GE腺癌模型进行临床前研究.
- 使用双重质谱法进行信号通路分析.
- 评估治疗干预的 ортотоп模型.
主要成果:
- 瘤NLRP3信号活动升高与黑色素瘤和GE腺癌中检查点抑制剂耐药性相关.
- 在耐药瘤中,NLRP3副本数量的增加与NLRP3信号的增强有关.
- NLRP3信号与NLRC5和MHC I类表达相反相关.
- NLRP3放大抑制了NLRC5介导的MHC I类上调.
- NLRP3与STAT1结合并抑制,从而抑制NLRC5的转录.
- 抑制NLRP3可以增强STAT1-NLRC5的信号传递,并克服抗PD-1的抗性.
结论:
- 瘤NLRP3炎症酶途径是免疫疗法耐药性的关键驱动因素.
- 向NLRP3可以通过上调MHC I类表达来恢复抗瘤免疫力.
- 抑制NLRP3是克服检查点抑制剂耐药性的有希望的策略.
- NLRP3和相关途径可以作为预测治疗反应的有价值的生物标志物.
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