黑色素瘤细胞通过PGE2和IDO1抑制iNKT细胞功能
Enza Torre1, Giulia Pinton1, Grazia Lombardi1
1Department of Pharmaceutical Sciences, University of Piemonte Orientale, 28100 Novara, Italy.
Cancers
|July 14, 2023
概括
黑色素瘤细胞通过损害不变的自然杀手T (iNKT) 细胞来抑制免疫监测. 在黑色素瘤中准IDO1和COX-2酶可能会恢复iNKT细胞功能,用于癌症免疫疗法.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞免疫学 细胞免疫学
背景情况:
- 不变的自然杀手T (iNKT) 细胞对于抗瘤免疫是至关重要的.
- 使用iNKT细胞的采用免疫疗法对黑色素瘤有希望,但面临挑战.
- 免疫抑制性瘤微环境 (TME) 阻碍了iNKT细胞的疗效.
研究的目的:
- 研究黑色素瘤细胞对TME内的iNKT细胞功能的影响.
- 阐明黑色素瘤细胞损害iNKT细胞活动的机制.
主要方法:
- 与黑色素瘤细胞系和iNKT细胞进行共同培养实验.
- 评估iNKT细胞增殖,NKG2D受体表达和细胞分解颗粒含量.
- 对iNKT细胞细胞毒性的评估.
- 用IDO1和COX-2的选择性抑制剂进行治疗.
主要成果:
- 黑色素瘤细胞系显著损害了iNKT细胞的增殖和功能.
- 同培养减少了NKG2D受体表达和iNKT细胞中的细胞分解颗粒.
- 黑色素瘤细胞诱导了iNKT细胞细胞毒性能力的强烈损害.
- 黑色素瘤细胞的IDO1上调和PGE2产生是iNKT细胞功能障碍的原因.
结论:
- 黑色素瘤细胞积极抑制iNKT细胞介导的抗瘤反应.
- IDO1和COX-2通路是黑色素瘤诱导的iNKT细胞抑制的关键媒介.
- 针对这些途径提供了一个潜在的策略,以增强iNKT细胞免疫治疗黑色素瘤.
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