骨髓衍生抑制细胞诱导疲劳-像CD8+ T细胞在JEV感染期间
Weijia Zhang1,2,3,4, Qing Yu1,2,3,4, Xiaochen Gao1,2,3,4
1State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China.
日本脑炎病毒 (JEV) 通过诱导CD8+ T细胞耗尽,导致免疫逃避. 阻断TIM-3或耗尽髓质衍生抑制细胞 (MDSCs) 恢复T细胞功能,改善小鼠的存活率.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 神经科学是一个神经科学.
背景情况:
- 日本脑炎 (JE) 是一种由蚊子传播的严重动物性疾病,由日本脑炎病毒 (JEV) 引起.
- 没有完全了解JEV穿越血脑屏障 (BBB) 的能力及其免疫逃避机制,这阻碍了治疗的发展.
- 了解JEV对T细胞反应的影响对于开发有效的治疗方法至关重要.
研究的目的:
- 研究JEV感染对CD8+T细胞反应的影响.
- 阐明JEV在BBB透之前抑制免疫反应的机制.
- 为了确定日本脑炎的潜在治疗点.
主要方法:
- 在JEV感染小鼠中评估了CD8+T细胞耗尽标记 (PD-1,TIM-3).
- 进行了体外实验,以研究骨髓原抑制细胞 (MDSC) 在T细胞功能障碍中的作用.
- 评估了TIM-3封锁和MDSC枯竭对T细胞功能和生存率的影响.
主要成果:
- 疹病毒感染增加了CD8+T细胞上的PD-1和TIM-3表达,表明T细胞耗尽.
- 在CD8+ T细胞中,MDSCs诱导了类似于疲劳的状态,调节PD-1和TIM-3.
- 阻断TIM-3或减少MDSC恢复了CD8+T细胞功能 (IFN-γ,TNF-α) 并改善了小鼠的生存率.
结论:
- 通过MDSC诱导的CD8+T细胞疲劳,JEV促进免疫逃避.
- TIM-3是治疗日本脑炎的潜在治疗标.
- 针对MDSC提供了一种有希望的策略来对抗JEV感染.
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