在罗塔病毒感染期间,TLR3/TRIF和MAVS信号对调节粘膜T细胞反应至关重要
Rong-Rong Zhang1, Xue-Yao Yang1, Yong-Lei Yang1
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, China.
Journal of immunology (Baltimore, Md. : 1950)
|August 28, 2024
概括
收费类受体3 (TLR3) 和TRIF信号传递对于对轮状病毒 (RV) 的适应性免疫至关重要. 丧失TLR3-TRIF会损害T细胞反应和树突细胞功能,导致RV感染期间严重的肠损伤.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 收费类受体3 (TLR3) 和RIG-I (MAVS) 是病毒感染期间双链RNA (dsRNA) 的关键传感器.
- 它们在对轮状病毒 (RV) 的适应性免疫反应中的确切作用仍然不完全理解.
研究的目的:
- 阐明TLR3-TRIF信号传递在对RV感染的适应性免疫反应中的功能.
- 调查TLR3和TRIF缺乏对RV挑战期间T细胞免疫和树突细胞功能的影响.
主要方法:
- 使用了TLR3-/-和TRIF-/-淘汰赛小鼠模型.
- 评估了病理损伤,抗原呈现,T细胞启动,增殖和记忆细胞的形成.
- 采用骨髓模拟模型并分析树突细胞迁移.
- 评估了细胞毒性活性和RV感染后的CD8+T细胞亡.
主要成果:
- 在TLR3-/-和TRIF-/-小鼠中,RV感染导致了严重的肠损伤.
- 来自缺陷小鼠的树突细胞显示抗原呈现和T细胞启动受损.
- TLR3-TRIF缺乏导致CD4+和CD8+T细胞功能,增殖和记忆细胞数量减少.
- 在缺乏RV的小鼠中,RV感染降低了细胞毒性活性,并增加了CD8+ T细胞亡.
- 观察到2型经典树突细胞向中腔淋巴结的迁移受损.
结论:
- 通过TRIF传递TLR3信号对粘膜T细胞对RV感染的反应起着至关重要的作用.
- 这一途径对于对RV的有效适应性免疫是必不可少的.
- 这些发现为开发针对TLR3-TRIF介导免疫的新型RV疫苗提供了基础.
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