在特定无病原体的中,由禽类腺病毒血清型8b诱导的致病性和先天免疫反应
Xiaona Zhang1, Liangliang Liu1, Fangfang Wang2
1College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, PR China; State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, the Chinese Academy of Agricultural Sciences, Harbin 150069, PR China.
Poultry science
|June 24, 2023
概括
禽类腺病毒血清型8b (FAdV-8b) 在SPF中复制,引发先天性免疫反应和抗体产生,而不会引起严重的临床症状. 这项研究详细介绍了的FAdV-8b病原和宿主免疫反应.
科学领域:
- 兽医病毒学 兽医病毒学
- 免疫学 免疫学 免疫学
- 禽类病理学 禽类病理学
背景情况:
- 禽类腺病毒血清型8b (FAdV-8b) 导致包括体肝炎 (IBH),这是家禽行业的一个重大问题.
- 天生的免疫系统在对抗病毒感染的宿主防御中起着至关重要的作用.
研究的目的:
- 在特定无病原体 (SPF) 中研究FAdV-8b菌株HLJ/151129的致病性.
- 为了阐明宿主对FAdV-8b感染的天生的免疫反应.
主要方法:
- 一个月大的SPF被感染了FAdV-8b菌株HLJ/151129.
- 评估了病理分析,病毒载荷检测,病毒分泌,病毒血,以及抗体标位.
- 分析了类似收费受体 (TLR),鸟类β-防御素 (AvBD),细胞因子和信号分子 (MyD88,NF-κB,TRIF) 的mRNA表达水平.
主要成果:
- 没有观察到显著的临床症状,移动性问题或死亡率,但发生了肝癌和炎症细胞透.
- FAdV-8b在多种组织中复制,病毒脱落和病毒病在感染后早期被检测出来.
- 产生了针对FAdV-8b的特定抗体,并提高了先天免疫基因表达 (TLRs,AvBDs,细胞因子),尽管一些TLRs被降低了.
- 免疫信号通路的关键组成部分 (MyD88,NF-κB,TRIF) 显示出改变的表达模式.
结论:
- FAdV-8b在SPF中广泛复制,诱导特定抗体的产生和强大的早期天生的免疫反应.
- 观察到的免疫反应,特别是先天性免疫因子的上调,尽管没有严重的临床症状,但可能与FAdV-8b的致病性有关.
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