外国表位特异性调节性T细胞对疫苗接种有强烈的反应,并限制了同一个表位特异性的常规T细胞对Th1的分化
Peter D Krueger1, Kevin C Osum2, Brian T Fife3
1Vaccine Research and Development, Pfizer, Pearl River, NY, United States.
Journal of immunology (Baltimore, Md. : 1950)
|September 27, 2025
概括
外国表位特异性调节T (Treg) 细胞微调免疫反应. 这些Treg细胞抑制了T辅助1细胞的分化,同时允许与传统T细胞的强有力的反应.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- T细胞的分化过程
背景情况:
- 福克斯p3+调节T (Treg) 细胞通常向自我抗原以防止自身免疫.
- 还观察到Treg细胞识别了外来 (非宿主) ,这一现象尚未完全理解.
- 在异性特异性CD4+T细胞群体中Treg细胞的存在引发了关于它们的起源和功能的问题.
研究的目的:
- 为了研究外来特异性Treg细胞在小鼠中的起源和功能作用.
- 与传统的T细胞相比,描述异性表位特异性Treg细胞的分化潜力.
- 为了确定外来表观特异性Treg细胞对初级免疫反应的影响.
主要方法:
- 对天真CD4+T细胞群体对Foxp3表达和细胞类型比率的分析.
- 在体内疫苗接种研究使用不同辅助剂配方的外来.
- 流细胞计和功能测试以评估T细胞的增殖,分化和记忆形成.
- 在Treg和Tconv种群中追踪Foxp3表达和血统承诺 (Th1,Th17,T毛囊辅助器).
主要成果:
- 原始的CD4+T细胞群体,特定于外来,大约有90%的Foxp3-常规T细胞 (Tconv) 和10%的Foxp3+Treg细胞.
- 接种疫苗后,Tconv和Treg细胞均发生增殖,形成记忆细胞.
- Tconv细胞分化为Th1,Th17和T毛囊辅助细胞,而Treg细胞在很大程度上保留了Foxp3并分化为Th1和Th17类细胞.
- 外国表位特异性Treg细胞没有影响Tconv细胞的增殖,但在Tconv群体内部分降低了Th1细胞的分化.
结论:
- 外来表位特异的Treg细胞微调了常规T细胞识别相同表位的初级免疫反应.
- 这些Treg细胞通过抑制Th1细胞命运来调节T细胞分化.
- 这些发现表明Treg细胞在管理对外来抗原的适应性免疫力,平衡效应因子功能和免疫控制方面发挥了调节作用.
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