TIM-4识别了表达RORγt驱动的抗炎细胞因子模块的效应体B细胞,该模块促进了免疫反应
Qing Ding1, Yufan Wu2, Elena Torlai Triglia2
1Thomas E. Starzl Transplantation Institute; University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
bioRxiv : the preprint server for biology
|October 4, 2023
概括
表达TIM-4的B细胞分泌像IL-17A这样的促炎细胞因子,驱动自身免疫性疾病并阻止调节功能. TIM-4标记了这些效应体B细胞 (Beff),为研究提供了新的途径.
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:
- 众所周知,B细胞产生促炎性细胞因子,有助于各种免疫反应.
- 在炎症中,B细胞的特定子集及其相关的细胞因子档案尚未完全阐明.
研究的目的:
- 识别和表征一种新型的亲炎性B细胞子集.
- 为了研究脂胺素受体TIM-4在B细胞效应器功能中的作用.
主要方法:
- 流细胞计和细胞因子分析以确定TIM-4+ B细胞及其细胞因子的产生.
- 在体内研究使用实验性自身免疫脑膜炎 (EAE) 模型和异种移植排斥模型.
- 分析信号通路,包括IL-23R和转录因子,如RORγt.
主要成果:
- 发现TIM-4+B细胞优先表达IL-17A,IL-22,IL-6,IL-1β和GM-CSF.
- 这种促炎性细胞因子表达取决于IL-23R信号和RORγt.
- 由TIM-4+ B细胞产生的IL-17A加剧了EAE和异种移植排斥,并抑制了调控性B细胞分化.
结论:
- TIM-4 识别了一组具有促炎特征的 RORγt+ 效应 B 细胞 (Beff) 的子集.
- 从TIM-4+ B细胞衍生的IL-17A促进炎症并强制执行B细胞功能.
- 蒂姆-4作为一个有价值的标记,用于研究贝夫的差异化和功能.
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