鱼菌株的免疫反应具有不同的易感性,对鱼水病毒疾病的免疫反应不同
Ali Asghar Baloch1, Dieter Steinhagen2, David Gela1
1Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic.
PeerJ
|July 19, 2023
概括
虫水腫病毒病 (CEVD) 影響魚產業. 鱼菌株的免疫基因表达显示出与CEV基因组相似的反应,这表明耐药性与选择的免疫反应无关.
科学领域:
- 水产养殖免疫学 水产养殖免疫学
- 鱼类病毒学 鱼类病毒学
- 水产养殖中的分子诊断.
背景情况:
- 虫水腫病毒病 (CEVD),或魚睡眠病 (KSD),對魚水產養殖產生重大威脅.
- 在CEVD期间了解免疫基因表达对于识别疾病生物标志物和开发抗药策略至关重要.
- 以前的研究还没有完全阐明不同鱼菌株和CEV基因组的免疫反应模式.
研究的目的:
- 研究四种鱼菌株对CEV感染的反应中11个免疫相关基因的差异表达.
- 为了确定CEV基因组I和IIa是否引起易受鱼的独特免疫反应.
- 识别与CEVD易感性和耐药性相关的潜在免疫生物标志物.
主要方法:
- 四种鱼菌株 (阿穆尔野生鱼,罗普沙鱼,普雷罗夫鱼和鱼) 通过同居感染了CEV基因组I或IIa.
- 对细胞因子 (IL-1β,IL-10,IL-6a,TNF-α2),抗病毒 (Mx2),细胞受体 (CD4,CD8b1,GzmA) 和粘蛋白的基因表达分析是在感染后6天和11天对状组织进行的.
- 在感染后5天,对两种感染CEV基因组IIa的选定菌株 (AS和koi) 进行了免疫基因表达和,肠和皮肤组织中的病毒载荷的额外分析.
主要成果:
- 在对两种CEV基因组的反应中,科伊鱼显示出所有测试的细胞因子基因 (IL-1β,IL-10,IL-6a,TNF-α2) 的显著上调.
- 阿穆尔·萨桑和罗普沙菌株表现出IL-6a和TNF-α2的上调,但不是其他细胞因子,而Mx2抗病毒基因表达在菌株和基因组之间有所不同.
- 在Amur Sasan和koi鱼中,T细胞反应基因 (CD4,CD8b1,GzmA) 总体下调,对CEV的耐药性无法与选择的免疫反应直接相关.
结论:
- 两种CEV基因组在普通鱼菌株中都激活了类似的免疫表达模式,无论它们的易感性如何.
- 塞维病毒感染诱导全身粘膜免疫反应,特别明显在鱼和肠道组织中,扩展到之外.
- 该研究表明,选择的免疫基因表达模式与CEV耐药性无关,凸显了宿主-病原体相互作用的复杂性.
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