在M-MDSCC中使用
Arpa Aintablian1, Sandra Strozniak1, Marion Heuer1
1Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany.
Frontiers in immunology
|June 5, 2023
概括
干白素-3 (IL-3) 在体外产生单细胞髓衍生抑制细胞 (M-MDSC),类似于GM-CSF. 这些IL-3产生的M-MDSC表现出更高的阿尔金酶1 (Arg1) 表达和增强的Arg1介导免疫抑制.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 骨髓衍生抑制细胞 (MDSC) 是免疫反应的关键调节者.
- 诱导性氧化合成酶 (iNOS) 和酶1 (Arg1) 是关键的MDSC效应器功能.
- 颗粒细胞-巨细胞殖民地刺激因子 (GM-CSF) 促进MDSC的发展,但IL-3的作用不太清楚.
研究的目的:
- 研究IL-3在产生单细胞MDSC (M-MDSC) 的潜力.
- 将IL-3产生的M-MDSC与由GM-CSF产生的M-MDSC进行比较.
主要方法:
- 用IL-3或GM-CSF在体外培养3天的小鼠骨髓 (BM) 细胞.
- 使用流细胞计的表型分析确定了M-MDSC和其他细胞类型.
- 功能性测试评估了使用iNOS和Arg1抑制剂在LPS+IFN-γ激活后的抑制活性.
主要成果:
- 像GM-CSF一样,IL-3产生了具有相似表型和产量的M-MDSC.
- 由IL-3产生的M-MDSC显示TNF,IL-1β和IL-10的产生较低,但Arg1的表达更高.
- 由IL-3生成的M-MDSC表现出增加的Arg1-依赖的抑制活性.
结论:
- IL-3可以在体外产生M-MDSC,反映GM-CSF的能力.
- 由IL-3诱导的M-MDSC具有独特的功能性质,特别是增强了Arg1的表达和活性.
- 这一发现为研究IL-3在MDSC生物学中的作用提供了一个新的体外模型.
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