IL-27促进CD122的Treg细胞表达和在恒常状态中的适应性
Zachary R Lanzar1, Daniel L Aldridge1, Elisa Cruz-Morales1
1Department of Pathobiology, University of Pennsylvania, Philadelphia, PA 19104.
概括
干白素-27 (IL-27) 信号增强调节性T (Treg) 细胞的竞争力和生存,通过促进CD122的表达,这对免疫平衡至关重要. 这种细胞因子通过提高对生长因子的反应能力来塑造Treg细胞池的组成.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 调节性T (Treg) 细胞对于免疫平衡和预防自身免疫是至关重要的.
- 众所周知,细胞因子介质素-27 (IL-27) 能够调节免疫反应.
- IL-27受体 (IL-27R) 在Treg细胞上高度表达,这表明它在它们的功能中发挥了作用.
研究的目的:
- 研究IL-27信号传递在Treg细胞发育,维护和功能中的作用.
- 为了确定IL-27R缺乏的Treg细胞与IL-27R充足的对应细胞相比的竞争能力.
- 阐明IL-27影响Treg细胞恒温的分子机制.
主要方法:
- 与IL-27R充足和不足的Treg细胞混合骨髓嵌合体的生成.
- 在Treg细胞上IL-27R的谱系特异性耗尽.
- 在老鼠的竞争性衰老实验中.
- 流细胞计分析以评估Treg细胞群和CD122表达.
- 关于IL-27和IL-2/15反应的体外和体内研究.
主要成果:
- 缺乏IL-27R的Treg细胞在竞争中处于劣势,并且在衰老过程中优先丢失.
- 这种缺陷与减少CD122的表达有关,这是IL-2/15受体的β链.
- IL-27信号传递促进了Treg细胞上的CD122表达,并增强了它们对IL-2/15的反应能力.
- 恒常性IL-27信号提供了竞争优势,塑造了Treg细胞池的组成.
结论:
- IL-27对Treg细胞发育或稳定状态的维持不至关重要,但对它们的竞争力和生存至关重要.
- IL-27通过调节对增长因子的响应能力,特别是IL-2和IL-15,通过CD122.2.通过IL-27影响Treg细胞平衡.
- 这些发现揭示了一种新的机制,即IL-27塑造Treg细胞池组成,影响免疫调节.
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