IL-12诱导B细胞内在的IL-12/IFNγ前循环,促进额外毛囊B细胞的反应
Rebecca A Elsner1, Shuchi Smita2, Mark J Shlomchik3
1Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA. relsner@pitt.edu.
Nature immunology
|June 11, 2024
概括
介质蛋白-12 (IL-12) 作为一个关键的开关,引导免疫反应向卵泡外通道和远离生殖中心. 这种细胞因子促进B细胞增殖和血细胞分化,影响免疫力和自身免疫力.
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:
- 对感染的免疫反应可以遵循不同的途径:生殖中心 (GC) 或卵泡外 (EF) 反应.
- 支配这些不同的免疫命运的分子机制仍然不完全理解.
研究的目的:
- 确定控制GC和EF免疫反应之间的切换的关键调节者.
- 阐明介素-12 (IL-12) 在调节B细胞分化和细胞因子信号传递中的作用.
主要方法:
- 研究了IL-12对小鼠和人类B细胞增殖和分化的影响.
- 在B细胞中分析了由IL-12和干扰素- (IFNγ) 诱导的基因表达变化.
- 使用缺乏IL-12和/或IFNγ受体的体内模型来评估免疫细胞功能.
主要成果:
- IL-12直接作用于B细胞,促进EF反应并抑制GC形成.
- IL-12与IFNγ建立了一个前循环,放大IFNγ的产生,增强B细胞增殖和血细胞分化.
- 缺乏IL-12和IFNγ受体的B细胞显示显著损害了血细胞的产生.
- 发现B细胞衍生IL-12可增强血细胞反应和T辅助1细胞的参与.
结论:
- IL-12作为一个关键的细胞因子开关,决定免疫反应的模式 (EF与GC).
- IL-12-IFNγ轴在B细胞增殖,等离子体分化和T辅助细胞两极化中发挥着关键作用.
- 来自B细胞的IL-12影响B细胞和T细胞的反应,对疫苗有效性,病原体保护和自身免疫性疾病有重大影响.
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