罗塔病毒通过TLR3/TRIF和MAVS途径诱导粘膜B细胞反应
Rong-Rong Zhang1, Yong-Yi Yang1, Man Wang1
1College of Veterinary Medicine, Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Engineering Research Center of Microecological Vaccines (Drugs) for Major Animal Diseases, Ministry of Education, Jilin Agricultural University, Changchun 130118, China.
Veterinary microbiology
|February 1, 2026
概括
罗塔病毒感染通过TLR3/TRIF和RIG-I/MAVS通道损害了B细胞免疫力. 这项研究揭示了这些途径如何调节B细胞反应,这对于开发新型轮状病毒疫苗至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 罗塔病毒 (RV) 是一种致动物性病原体,在全球引起严重腹.
- 包括RIG-I/MAVS在内的托尔类受体3 (TLR3) /TIR域含适配器诱导干扰素β (TRIF) 和RIG-I类受体 (RLR) 途径对于抗病毒反应至关重要.
- 在RV诱导的B细胞免疫中TLR3和RIG-I信号的确切作用尚未完全理解.
研究的目的:
- 通过TLR3/TRIF和MAVS信号通路阐明罗塔病毒对B细胞免疫反应调节的机制.
- 调查TRIF基因缺失对RV感染期间CD4+T细胞中T细胞受体谱的影响.
- 为开发新型轮状病毒疫苗提供理论基础.
主要方法:
- 在小鼠CD4+T细胞上进行T细胞受体 (TCR) 测序.
- 对淘汰赛小鼠中介淋巴结 (MLN) 中生殖中心 (GC) 激活的B细胞 (TLR3-/-, TRIF-/-, MAVS-/-) 的分析.
- 细肠中血清抗体水平和CD138+IgA+细胞的量化.
主要成果:
- TRIF基因删除改变了在CD4+T细胞中抗原特异性互补性决定区域3 (CDR3) 克隆和V/J基因使用的频率.
- 在TLR3-/,TRIF-/和MAVS-/小鼠的MLN中观察到GC激活B细胞的显著减少.
- 在这些小鼠的小肠中发现血清抗体水平降低,CD138+IgA+细胞减少.
- 缺少TLR3和MAVS基因的小鼠表现出B细胞增殖受损.
结论:
- TLR3/TRIF和MAVS信号通路是罗塔病毒诱导的B细胞免疫的关键调节者.
- 这些途径影响T细胞反应和B细胞激活,生殖中心形成和抗体产生.
- 了解这些机制为开发针对B细胞反应的有效罗塔病毒疫苗提供了基础.
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