表达FFAR2的骨髓系衍生抑制细胞驱动癌症免疫逃生
Zeda Zhao1, Juliang Qin1, Ying Qian1
1Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China.
酸通过FFAR2.2激活骨髓衍生抑制细胞 (MDSCs) 来促进癌症免疫逃避. 针对这一轴可以逆转免疫抑制,改善癌症免疫治疗结果.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 代谢学 代谢学 代谢学
背景情况:
- 异常代谢物通过创建免疫抑制瘤微环境,有助于癌症免疫逃避.
- 骨髓原抑制细胞 (MDSCs) 是关键的免疫抑制细胞,与癌症预后不佳有关.
- MDSC介导的免疫抑制与特定癌症代谢之间的联系尚不清楚.
研究的目的:
- 为了研究癌症代谢在MDSC介导的免疫抑制中的作用.
- 为了确定特定的代谢物和参与肺腺癌免疫规避的途径.
- 探索潜在的治疗目标,以逆转免疫抑制瘤微环境.
主要方法:
- 利用了肺腺癌小鼠模型和来自患者的组织.
- 使用气相色谱-质谱法 (GC-MS) 进行代谢物分析.
- 在免疫细胞上进行了流细胞计,RNA测序和西式涂抹.
主要成果:
- 酸在瘤中的积累与免疫抑制和通过FFAR2.2.的癌症进展相关.
- 在肺腺癌患者的MDSC中,FFAR2的表达很高,与预后不佳有关.
- 删除FFAR2抑制了瘤生长,减少了MDSC,并增加了CD8+ T细胞的透.
- 在MDSC中FFAR2缺陷通过Gαq//PPAR-γ轴降低了Arg1表达,恢复了T细胞功能.
- 抑制FFAR2增强了抗瘤免疫力,克服了对免疫检查点阻塞的抵抗力.
结论:
- 酸/FFAR2轴通过Gαq//PPAR-γ/Arg1通路驱动MDSC介导的免疫抑制.
- FFAR2是逆转免疫抑制和增强癌症免疫疗法的潜在治疗标.
- 向FFAR2可能会改善癌症患者的临床结果,特别是肺腺癌.
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