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6 - 酸酸脱酶促进线粒体融合和免疫抑制在瘤相关的单细胞抑制细胞
Saeed Daneshmandi1,2, Qi Yan3, Eduardo Cortes Gomez4
1Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA. Saeed.daneshmandi@roswellpark.org.
Nature communications
|January 14, 2026
概括
研究人员发现,阻断6 - 酸酸脱酶 (6PGD) 损害了髓质衍生抑制细胞 (M-MDSCs) 的免疫抑制功能. 这种方法还抑制了瘤的生长,并提高了癌症免疫治疗的结果.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 癌症生物学 癌症生物学
背景情况:
- 瘤微环境中的髓状细胞的代谢适应尚未完全理解.
- 单细胞-骨髓性衍生抑制细胞 (M-MDSCs) 在瘤免疫逃避中起着至关重要的作用.
研究的目的:
- 研究6-酸酸脱酶 (6PGD) 在M-MDSC功能中的作用.
- 探索6PGD作为癌症免疫治疗中的潜在治疗标.
主要方法:
- 确定了6PGD作为M-MDSC功能的调节者.
- 利用遗传和药理方法阻止6PGD.
- 分析了包括IL-6/STAT3,JNK1-IRS1和PI3K-AKT-pDRP1.1在内的信号通路.
- 评估了线粒体碎片化和反应性氧物种 (ROS) 生产.
- 在临床前模型中评估了6PGD阻断与抗PD-1免疫疗法的协同作用.
主要成果:
- 瘤M-MDSCs通过IL-6/STAT3信号传递对6PGD的表达进行上调.
- 阻止6PGD会损害M-MDSC的免疫抑制功能,并抑制瘤的生长.
- 抑制6PGD会导致6-基酸盐的积累,激活JNK1-IRS1和PI3K-AKT-pDRP1通路,导致线粒体碎片化和ROS的增加.
- 这种新陈代谢转变将M-MDSC重新编程为类似M1的炎症表型.
- 6PGD阻断与抗PD-1免疫疗法协同作用,在临床前瘤模型中改善治疗结果.
结论:
- 6PGD是瘤微环境中M-MDSC功能的关键调节者.
- 准6PGD可以破坏M-MDSC介导的免疫抑制.
- 6PGD封锁代表了增强癌症免疫治疗疗效的有希望的策略.
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