线粒体DNA谱系通过T细胞反应性氧气信号来决定瘤的进展
Tal Yardeni1,2, Arnold Z Olali1, Hsiao-Wen Chen1
1Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA 19104.
概括
主体线粒体DNA (mtDNA) 影响免疫细胞功能和癌症进展. 特定的mtDNA谱系会损害T调节细胞功能,阻碍抗瘤免疫力和全移植存活.
科学领域:
- 免疫学 免疫学 免疫学
- 线粒体生物学 线粒体生物学
- 癌症研究 癌症研究
背景情况:
- 主体线粒体DNA (mtDNA) 的变异与癌症的严重程度有关.
- 线粒体产生反应性氧物种 (ROS),影响细胞功能.
研究的目的:
- 研究不同mtDNA系对免疫细胞功能和癌症进展的影响.
- 阐明线粒体ROS (mROS) 在T调节细胞 (Treg) 功能障碍中的作用.
主要方法:
- 使用具有不同mtDNA谱系 (mtDNA和mtDNA) 的共塑性小鼠.
- 评估了对mtDNA变异的反应中的异种移植存活率和瘤生长.
- 分析了T效应体 (Teff) 和Treg细胞的功能和基因表达.
- 研究了线粒体向抗氧化剂 (mCAT) 和抗PD-L1疗法的效果.
主要成果:
- mtDNA谱系损害了Treg功能,导致急性全移植排斥和增强瘤生长.
- mtDNA谱系支持Treg功能,促进异种移植的存活,抑制瘤生长.
- 在mtDNA中观察到Treg细胞耗尽,这与线粒体基因表达受损有关.
- mCAT治疗使Treg功能正常化,突出显示了mROS在Treg功能障碍中的作用.
- 抗PD-L1治疗没有影响这些mtDNA驱动的结果.
结论:
- 宿主mtDNA变异对Treg细胞功能和免疫反应产生重大影响.
- 由特定的mtDNA谱系产生的mROS有助于Treg功能障碍和癌症中的免疫逃避.
- 调节宿主线粒体功能为癌症治疗提供了一个新的治疗策略,独立于PD-L1.
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