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A effective DNA vaccine against diverse genotype J infectious hematopoietic necrosis virus strains prevalent in China

文献类型： 外文期刊

作者： Xu, Liming 1 ; Zhao, Jingzhuang 1 ; Liu, Miao 1 ; Kurath, Gael 2 ; Ren, Guangming 1 ; Lapatra, Scott E. 3 ; Yin, Jiash 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Harbin 150070, Peoples R China

2.USGS Biol Resources Div, Western Fisheries Res Ctr, Seattle, WA 98115 USA

3.Clear Springs Foods Inc, Div Res, Buhl, ID USA

4.Benxi Agrimarine Co Ltd, Benxi 117000, Peoples R China

关键词： Cross-protection;DNA vaccine;Intragenogroup challenge;Infectious hematopoietic necrosis virus;Rhabdovirus;Genogroup J

期刊名称：VACCINE （ 影响因子：3.641； 五年影响因子：3.816 ）

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收录情况： SCI

摘要： Infectious hematopoietic necrosis virus (IHNV) is the most important pathogen threatening the aquaculture of salmonid fish in China. In this study, a DNA vaccine, designated pIHNch-G, was constructed with the glycoprotein (G) gene of a Chinese IHNV isolate SD-12 (also called Sn1203) of genotype J. The minimal dose of vaccine required, the expression of the Mx-1 gene in the muscle (vaccine delivery site) and anterior kidney, and the titers of the neutralizing antibodies produced were used to evaluate the vaccine efficacy. To assess the potential utility of the vaccine in controlling IHNV throughout China, the cross protective efficacy of the vaccine was determined by challenging fish with a broad range of IHNV strains from different geographic locations in China. A single 100 ng dose of the vaccine conferred almost full protection to rainbow trout fry (3 g) against waterborne or intraperitoneal injection challenge with IHNV strain SD-12 as early as 4 days post-vaccination (d.p.v.), and significant protection was still observed at 180 d.p.v. Intragenogroup challenges showed that the DNA vaccine provided similar protection to the fish against all the Chinese IHNV isolates tested, suggesting that the vaccine can be widely used in China. Mx-1 gene expression was significantly upregulated in the muscle tissue (vaccine delivery site) and anterior kidney in the vaccinated rainbow trout at both 4 and 7 d.p.v. Similar levels of neutralizing antibodies were determined with each of the Chinese IHNV strains at 60 and 180 d.p.v. This DNA vaccine should play an important role in the control of IHN in China. (C) 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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