An inactivated vaccine against infectious pancreatic necrosis virus in rainbow trout (Oncorhynchus mykiss)
文献类型： 外文期刊
作者： Duan, Kaiyue 1 ; Tang, Xin 1 ; Zhao, Jingzhuang 1 ; Ren, Guangming 1 ; Shao, Yizhi 1 ; Lu, Tongyan 1 ; He, Baoquan 1 ; Xu, Liming 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Dept Aquat Anim Dis & Control, Key Lab Aquat Anim Dis & Immune Technol Heilongji, Harbin 150070, Peoples R China
关键词： Rainbow trout; Infectious pancreatic necrosis virus; beta-propiolactone; Inactivated vaccine
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.622； 五年影响因子：4.799 ）
ISSN： 1050-4648
年卷期： 2022 年 127 卷
页码：
收录情况： SCI
摘要： Infectious pancreatic necrosis virus (IPNV), belonging to the genus Aquabirnavirus within the family Birnaviridae, causes huge economic loss to the global salmonid industry every year. Recently, outbreaks of disease caused by genogroup HPNV were found in many rainbow trout (Oncorhynchus mykiss) farms worldwide. An inactivated vaccine was prepared using a genogroup HPNV isolate with an optimized procedure as incubation with beta-propanolactone (BPL) at the final concentration of 0.5% at room temperature for 48 h. The inactivated vaccine was used to immunize rainbow trout, and the protection efficiency was evaluated by viral loads determination, immune-related genes quantification, and neutralizing antibody tests. The viral loads in immunized rainbow trout were significantly decreased and the strongest antiviral effect was observed on 30 days post-immunization (d.p.i). The expression of innate immune-related genes IFN-1, and Mx-1 genes were significantly up-regulated on 3, 7, and 15 d.p.i (p < 0.05), and adaptive immune-related genes CD4, CD8, and IgM genes were significantly upregulated on 15 and 30 d.p.i (p < 0.05). Neutralizing antibodies were firstly detected on 30 d.p.i and the highest titer was observed on 45 d.p.i, which began to decrease on 60 d.p.i, but was still significantly higher than that in negative control fish. The results indicated that the vaccine prepared in this study could stimulate the nonspecific and specific immune response and provide significant immune protection to the vaccinated rainbow trout.
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