托尔类受体介导的炎症将B细胞引导到保护性抗病毒卵泡外反应
Jonathan H Lam1,2,3, Nicole Baumgarth4,5,6,7
1Graduate Group in Immunology, University of California Davis, Davis, USA.
Nature communications
|July 5, 2023
概括
流感感染迅速诱导卵泡外血细胞反应 (EFR),通过托尔类受体 (TLR) 信号产生保护性抗体. 这些TLR介导的机制增强了B细胞的生存和分化,从而改善了抗病毒保护.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 传统上,人们认为额外毛囊性血细胞反应 (EFR) 产生具有有限保护价值的低亲和度抗体.
- 高强度抗原-B细胞受体参与被认为是EFR和生殖中心 (GC) B细胞分化的主要驱动因素.
研究的目的:
- 研究托尔类受体 (TLR) 介导机制在流感感染期间快速生成保护性抗体中的作用.
- 为了阐明炎症信号如何影响B细胞命运的决定,以获得有效的抗病毒反应.
主要方法:
- 诱导EFRs作为对流感感染的反应.
- 对B细胞内在和外在TLR介导机制的分析.
- 通过IRF4和NF-kBc-Rel信号,评估B细胞存活,克隆扩张和分化.
- 免疫后TLR4刺激后对抗体产生和保护能力的评估.
主要成果:
- 流感感染迅速诱导EFRs,通过TLR介导的途径产生保护性抗体.
- 通过激活NF-kB c-Rel和诱导IRF4,B细胞内在的TLR信号通过激活NF-kB c-Rel和诱导IRF4促进抗原刺激的B细胞生存,扩张和分化.
- 持续的TLR4刺激将病毒特异性B细胞重定向到EFR,与单独抗原/相比,增强快速抗体产生和保护能力.
结论:
- 炎症信号,特别是TLR介导的通路,是B细胞命运的关键决定因素,推动保护性抗病毒EFRs的快速生成.
- EFRs可以产生高亲和度的保护性抗体,挑战了传统的看法,即它们的保护能力有限.
- 针对TLRs提供了增强疫苗诱导的抗病毒免疫力的潜在策略.
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