1
|
Huo C, Huang D, Ma Z, Li G, Li T, Lin W, Jiang N, Xing W, Xu G, Yu H, Luo L, Sun H. Specificity of DNA Vaccines against the Genogroup J and U Infectious Hematopoietic Necrosis Virus Strains Prevalent in China. Viruses 2022; 14:v14122707. [PMID: 36560709 PMCID: PMC9780822 DOI: 10.3390/v14122707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 11/23/2022] [Accepted: 11/29/2022] [Indexed: 12/09/2022] Open
Abstract
Infectious hematopoietic necrosis virus (IHNV) is the most important pathogen threatening the aquaculture of salmonid fish in China. In addition to the common genogroup J IHNV, genogroup U has been newly discovered in China. However, there is no effective DNA vaccine to fight against this emerging genogroup U IHNV in China. In this study, DNA vaccines encoding the IHNV viral glycoprotein (G) gene of the GS2014 (genogroup J) and BjLL (genogroup U) strains isolated from northern China were successfully developed, which were identified by restriction analysis and IFA. The expression of the Mx-1 gene and G gene in the spleens and muscles of the injection site as well as the titers of the serum antibodies were measured to evaluate the vaccine efficacy by RT-qPCR and ELISA. We found that DNA vaccine immunization could activate Mx1 gene expression and upregulate G gene expression, and the mRNA levels of the Mx1 gene in the muscles were significantly higher than those in the spleens. Notably, DNA vaccine immunization might not promote the serum antibody in fish at the early stage of immunization. Furthermore, the efficacy of the constructed vaccines was tested in intra- and cross-genogroup challenges by a viral challenge in vivo. It seemed that the DNA vaccines were able to provide great immune protection against IHNV infection. In addition, the genogroup J IHNV-G DNA vaccine showed better immune efficacy than the genogroup U IHNV-G or divalent vaccine, which could provide cross-immune protection against the genogroup U IHNV challenge. Therefore, this is the first study to construct an IHNV DNA vaccine using the G gene from an emerging genogroup U IHNV strain in China. The results provide great insight into the advances of new prophylactic strategies to fight both the genogroup J and U IHNV in China.
Collapse
Affiliation(s)
- Caiyun Huo
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Shuguang Huayuan Zhonglu, Haidian District, Beijing 100097, China
| | - Dandan Huang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Shuguang Huayuan Zhonglu, Haidian District, Beijing 100097, China
| | - Zhihong Ma
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Guiping Li
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Shuguang Huayuan Zhonglu, Haidian District, Beijing 100097, China
| | - Tieliang Li
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Wutong Lin
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Shuguang Huayuan Zhonglu, Haidian District, Beijing 100097, China
| | - Na Jiang
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Wei Xing
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Guanling Xu
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Huanhuan Yu
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
| | - Lin Luo
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, No. 18 Jiaomen Road, Fengtai District, Beijing 100068, China
- Correspondence: (L.L.); (H.S.)
| | - Huiling Sun
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, No. 9 Shuguang Huayuan Zhonglu, Haidian District, Beijing 100097, China
- Correspondence: (L.L.); (H.S.)
| |
Collapse
|
2
|
Niner MD, Stepien CA, Gorgoglione B, Leaman DW. Genomic and immunogenic changes of Piscine novirhabdovirus (Viral Hemorrhagic Septicemia Virus) over its evolutionary history in the Laurentian Great Lakes. PLoS One 2021; 16:e0232923. [PMID: 34048438 PMCID: PMC8162641 DOI: 10.1371/journal.pone.0232923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 04/22/2021] [Indexed: 01/21/2023] Open
Abstract
A unique and highly virulent subgenogroup (-IVb) of Piscine novirhabdovirus, also known as Viral Hemorrhagic Septicemia Virus (VHSV), suddenly appeared in the Laurentian Great Lakes, causing large mortality outbreaks in 2005 and 2006, and affecting >32 freshwater fish species. Periods of apparent dormancy have punctuated smaller and more geographically-restricted outbreaks in 2007, 2008, and 2017. In this study, we conduct the largest whole genome sequencing analysis of VHSV-IVb to date, evaluating its evolutionary changes from 48 isolates in relation to immunogenicity in cell culture. Our investigation compares genomic and genetic variation, selection, and rates of sequence changes in VHSV-IVb, in relation to other VHSV genogroups (VHSV-I, VHSV-II, VHSV-III, and VHSV-IVa) and with other Novirhabdoviruses. Results show that the VHSV-IVb isolates we sequenced contain 253 SNPs (2.3% of the total 11,158 nucleotides) across their entire genomes, with 85 (33.6%) of them being non-synonymous. The most substitutions occurred in the non-coding region (NCDS; 4.3%), followed by the Nv- (3.8%), and M- (2.8%) genes. Proportionally more M-gene substitutions encoded amino acid changes (52.9%), followed by the Nv- (50.0%), G- (48.6%), N- (35.7%) and L- (23.1%) genes. Among VHSV genogroups and subgenogroups, VHSV-IVa from the northeastern Pacific Ocean has shown the fastest substitution rate (2.01x10-3), followed by VHSV-IVb (6.64x10-5) and by the VHSV-I, -II and-III genogroups from Europe (4.09x10-5). A 2016 gizzard shad (Dorosoma cepedianum) from Lake Erie possessed the most divergent VHSV-IVb sequence. The in vitro immunogenicity analysis of that sample displayed reduced virulence (as did the other samples from 2016), in comparison to the original VHSV-IVb isolate (which had been traced back to 2003, as an origin date). The 2016 isolates that we tested induced milder impacts on fish host cell innate antiviral responses, suggesting altered phenotypic effects. In conclusion, our overall findings indicate that VHSV-IVb has undergone continued sequence change and a trend to lower virulence over its evolutionary history (2003 through present-day), which may facilitate its long-term persistence in fish host populations.
Collapse
Affiliation(s)
- Megan D. Niner
- Department of Environmental Sciences, University of Toledo, Toledo, Ohio, United States of America
| | - Carol A. Stepien
- School of Oceanography, University of Washington, Seattle, WA, United States of America
- Genetics and Genomics Group, NOAA Pacific Marine Environmental Laboratory, Seattle, Washington, United States of America
- * E-mail: ,
| | - Bartolomeo Gorgoglione
- Department of Biological Sciences, University of Toledo, Toledo, Ohio, United States of America
| | - Douglas W. Leaman
- Department of Biological Sciences, University of Toledo, Toledo, Ohio, United States of America
- Department of Biological Sciences, Wright State University, Dayton, Ohio, United States of America
| |
Collapse
|
3
|
Huo C, Ma Z, Li F, Xu F, Li T, Zhang Y, Jiang N, Xing W, Xu G, Luo L, Sun H. First isolation and pathogenicity analysis of a genogroup U strain of infectious hematopoietic necrosis virus from rainbow trout in China. Transbound Emerg Dis 2021; 69:337-348. [PMID: 33417745 DOI: 10.1111/tbed.13983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 12/19/2020] [Accepted: 01/05/2021] [Indexed: 11/26/2022]
Abstract
Infectious hematopoietic necrosis virus (IHNV) is a major fish viral pathogen causing acute clinical disease and death in a variety of salmonids. IHNV isolates have been classified into five major genogroups according to the phylogenetic analysis of partial G gene fragments or the complete G gene sequence: U, M, E, L and J. Genogroup U strains have been reported in North America and Japan prior to 1982, and genogroup J is the only genogroup that has been reported in China. Here, one of IHNV strain (BjLL) was isolated from a local farm in China and were characterized in this study. The homogenate tissues of infected fry induced IHNV-positive cytopathic effects in epithelioma papulosum cyprinid (EPC) cells that were confirmed by RT-PCR and sequencing. The complete genome sequence of BjLL comprised 11,129 nucleotides, which had been submitted to GenBank (accession no. MF509592). By the sequence comparison and phylogenetic analysis for the G gene sequence of BjLL with 51 reference sequences in GenBank, we confirmed that this Chinese isolate belonged to genogroup U. Furthermore, virus exposure experiments with juvenile rainbow trout were conducted to assess the virulence and pathogenicity of BjLL. Compared with GS-2014 of genogroup J, BjLL was an obviously less virulent strain that could result in lower mortality. Besides, typical clinical symptoms and pathological damages could be seen in fish following infection of BjLL. The present study is the first report of genogroup U IHNV infection in China and will provide essential information for future studies on pathogenesis of IHNV BjLL and development of efficient control strategies.
Collapse
Affiliation(s)
- Caiyun Huo
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Zhihong Ma
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Fangbing Li
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Fuzhou Xu
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Tieliang Li
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Yue Zhang
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Na Jiang
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Wei Xing
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Guanling Xu
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Lin Luo
- Beijing Fisheries Research Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Huiling Sun
- Beijing Key Laboratory for Prevention and Control of Infectious Diseases in Livestock and Poultry, Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| |
Collapse
|
4
|
Polinski MP, Vendramin N, Cuenca A, Garver KA. Piscine orthoreovirus: Biology and distribution in farmed and wild fish. JOURNAL OF FISH DISEASES 2020; 43:1331-1352. [PMID: 32935367 DOI: 10.1111/jfd.13228] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/06/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Piscine orthoreovirus (PRV) is a common and widely distributed virus of salmonids. Since its discovery in 2010, the virus has been detected in wild and farmed stocks from North America, South America, Europe and East Asia in both fresh and salt water environments. Phylogenetic analysis suggests three distinct genogroups of PRV with generally discrete host tropisms and/or regional patterns. PRV-1 is found mainly in Atlantic (Salmo salar), Chinook (Oncorhynchus tshawytscha) and Coho (Oncorhynchus kisutch) Salmon of Europe and the Americas; PRV-2 has only been detected in Coho Salmon of Japan; and PRV-3 has been reported primarily in Rainbow Trout (Oncorhynchus mykiss) in Europe. All three genotypes can establish high-load systemic infections by targeting red blood cells for principal replication. Each genotype has also demonstrated potential to cause circulatory disease. At the same time, high-load PRV infections occur in non-diseased salmon and trout, indicating a complexity for defining PRV's role in disease aetiology. Here, we summarize the current body of knowledge regarding PRV following 10 years of study.
Collapse
Affiliation(s)
- Mark P Polinski
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - Niccoló Vendramin
- National Institute of Aquatic Resources, Technical University of Denmark, Lyngby, Denmark
| | - Argelia Cuenca
- National Institute of Aquatic Resources, Technical University of Denmark, Lyngby, Denmark
| | - Kyle A Garver
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| |
Collapse
|
5
|
Kim KI, Lee UH, Cho M, Jung SH, Min EY, Park JW. Transcriptome analysis based on RNA-seq of common innate immune responses of flounder cells to IHNV, VHSV, and HIRRV. PLoS One 2020; 15:e0239925. [PMID: 32986779 PMCID: PMC7521715 DOI: 10.1371/journal.pone.0239925] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 09/15/2020] [Indexed: 12/25/2022] Open
Abstract
Viral hemorrhagic septicemia virus (VHSV) and hirame rhabdovirus (HIRRV) belong to the genus Novirhabdovirus and are the causative agents of a serious disease in cultured flounder. However, infectious hematopoietic necrosis virus (IHNV), a prototype of the genus Novirhabdovirus, does not cause disease in flounder. To determine whether IHNV growth is restricted in flounder cells, we compared the growth of IHNV with that of VHSV and HIRRV in hirame natural embryo (HINAE) cells infected with novirhabdoviruses at 1 multiplicity of infection. Unexpectedly, we found that IHNV grew as well as VHSV and HIRRV. For successful growth in host cells, viruses modulate innate immune responses exerted by virus-infected cells. Our results suggest that IHNV, like VHSV and HIRRV, has evolved the ability to overcome the innate immune response of flounder cells. To determine the innate immune response genes of virus-infected HINAE cells which are commonly modulated by the three novirhabdoviruses, we infected HINAE cells with novirhabdoviruses at multiplicity of infection (MOI) 1 and performed an RNA sequencing-based transcriptome analysis at 24 h post-infection. We discovered ~12,500 unigenes altered by novirhabdovirus infection and found that many of these were involved in multiple cellular pathways. After novirhabdovirus infection, 170 genes involved in the innate immune response were differentially expressed compared to uninfected cells. Among them, 9 genes changed expression by more than 2-fold and were commonly modulated by all three novirhabdoviruses. Interferon regulatory factor 8 (IRF8), C-X-C motif chemokine receptor 1 (CXCR1), Toll/interleukin-1 receptor domain-containing adapter protein (TIRAP), cholesterol 25-hydroxylase (CH25H), C-X-C motif chemokine ligand 11, duplicate 5 (CXCL11.5), and Toll-like receptor 2 (TLR2) were up-regulated, whereas C-C motif chemokine receptor 6a (CCR6a), interleukin-12a (IL12a), and Toll-like receptor 1 (TLR1) were down-regulated. These genes have been reported to be involved in antiviral responses and, thus, their modulation may be critical for the growth of novirhabdovirus in flounder cells. This is the first report to identify innate immune response genes in flounder that are commonly modulated by IHNV, VHSV, and HIRRV. These data will provide new insights into how novirhabdoviruses survive the innate immune response of flounder cells.
Collapse
Affiliation(s)
- Kwang Il Kim
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Unn Hwa Lee
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
| | - Miyoung Cho
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Sung-Hee Jung
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Eun Young Min
- Pathology Research Division, National Institute of Fisheries Science, Busan, Korea
| | - Jeong Woo Park
- Department of Biological Sciences, University of Ulsan, Ulsan, Korea
- * E-mail:
| |
Collapse
|
6
|
Wang ZX, Zhou Y, Lu LF, Lu XB, Ni B, Liu MX, Guan HX, Li S, Zhang YA, Ouyang S. Infectious hematopoietic necrosis virus N protein suppresses fish IFN1 production by targeting the MITA. FISH & SHELLFISH IMMUNOLOGY 2020; 97:523-530. [PMID: 31881328 DOI: 10.1016/j.fsi.2019.12.075] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/20/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
Interferon (IFN) is a vital antiviral factor in host in the early stages after the viral invasion. Meanwhile, viruses have to survive by taking advantage of the cellular machinery and complete their replication. As a result, viruses evolved several immune escape mechanisms to inhibit host IFN expression. However, the mechanisms used to escape the host's IFN system are still unclear for infectious hematopoietic necrosis virus (IHNV). In this study, we report that the N protein of IHNV inhibits IFN1 production in rainbow trout by degrading the MITA. Firstly, the upregulation of IFN1 promoter activity stimulated by poly I:C was suppressed by IHNV infection. Consistent with this result, the overexpression of the N protein of IHNV blocked the IFN1 transcription that was activated by poly I:C and MITA. Secondly, MITA was remarkably decreased by the overexpression of N protein at the protein level. Further analysis demonstrated that the N protein targeted MITA and promoted the ubiquitination of MITA. Taken together, these data suggested that the production of rainbow trout IFN1 could be suppressed by the N protein of IHNV via degrading MITA.
Collapse
Affiliation(s)
- Zhao-Xi Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation, The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; University of Chinese Academy of Science, Beijing, China
| | - Yu Zhou
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; University of Chinese Academy of Science, Beijing, China
| | - Long-Feng Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Xiao-Bing Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Bo Ni
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation, The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Product of State Oceanic Administration, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China
| | - Meng-Xi Liu
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation, The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; Fujian Key Laboratory of Special Marine Bio-resources Sustainable Utilization, Fujian Normal University, Fuzhou, 350117, China
| | - Hong-Xin Guan
- Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation, The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Product of State Oceanic Administration, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; Fujian Key Laboratory of Special Marine Bio-resources Sustainable Utilization, Fujian Normal University, Fuzhou, 350117, China
| | - Shun Li
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), 266337, China; State Key Laboratory of Aquaculture Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, China.
| | - Songying Ouyang
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), 266337, China; Provincial University Key Laboratory of Cellular Stress Response and Metabolic Regulation, The Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, Key Laboratory of OptoElectronic Science and Technology for Medicine of the Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; The Public Service Platform for Industrialization Development Technology of Marine Biological Medicine and Product of State Oceanic Administration, College of Life Sciences, Fujian Normal University, Fuzhou, 350117, China; Fujian Key Laboratory of Special Marine Bio-resources Sustainable Utilization, Fujian Normal University, Fuzhou, 350117, China
| |
Collapse
|
7
|
A chimeric recombinant infectious hematopoietic necrosis virus induces protective immune responses against infectious hematopoietic necrosis and infectious pancreatic necrosis in rainbow trout. Mol Immunol 2019; 116:180-190. [PMID: 31704501 DOI: 10.1016/j.molimm.2019.10.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/23/2019] [Accepted: 10/23/2019] [Indexed: 12/18/2022]
Abstract
Infectious pancreatic necrosis virus (IPNV) and infectious hematopoietic necrosis virus (IHNV) are two common viral pathogens that cause severe economic losses in all salmonid species in culture, but especially in rainbow trout. Although vaccines against both diseases have been commercialized in some countries, no such vaccines are available for them in China. In this study, a recombinant virus was constructed using the IHNV U genogroup Blk94 virus as a backbone vector to express the antigenic gene, VP2, from IPNV via the reverse genetics system. The resulting recombinant virus (rBlk94-VP2) showed stable biological characteristics as confirmed by virus growth kinetic analyses, pathogenicity analyses, indirect immunofluorescence assays and western blotting. Rainbow trout were immunized with rBlk94-VP2 and then challenged with the IPNV ChRtm213 strain and the IHNV Sn1203 strain on day 45 post-vaccination. A significantly higher survival rate against IHNV was obtained in the rBlk94-VP2 group on day 45 post-vaccination (86%) compared with the PBS mock immunized group (2%). Additionally, IPNV loads decreased significantly in the rBlk94-VP2 immunized group in the liver (28.6-fold to 36.5-fold), anterior kidney (21.7-fold to 44.2-fold), and spleen (14.9-fold to 22.7-fold), as compared with the PBS mock control group. The mRNA transcripts for several innate and adaptive immune-related proteins (IFN-γ, IFN-1, Mx-1, CD4, CD8, IgM, and IgT) were also significantly upregulated after rBlk94-VP2 vaccination, and neutralizing antibodies against both IHNV and IPNV were induced on day 45 post-vaccination. Collectively, our results suggest that this recombinant virus could be developed as a vaccine vector to protect rainbow trout against two or more diseases, and our approach lays the foundations for developing live vaccines for rainbow trout.
Collapse
|
8
|
Genome and Phylogenetic Analysis of Infectious Hematopoietic Necrosis Virus Strain SNU1 Isolated in Korea. Pathogens 2019; 8:pathogens8040200. [PMID: 31640188 PMCID: PMC6963739 DOI: 10.3390/pathogens8040200] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/15/2019] [Accepted: 10/19/2019] [Indexed: 12/17/2022] Open
Abstract
Infectious hematopoietic necrosis virus (IHNV), one of the most important pathogenic fish viruses, affects trout fisheries and causes considerable economic losses. Currently, in Korea, more studies on IHNV infection are being reported. However, relatively less data is available on Korean isolates than on those from other countries. Few studies have focused on gene sequence analyses of IHNV glycoprotein (G) gene and almost none have focused on other gene fragments. Therefore, considering the dearth of adequate phylogenetic and genomic studies on Korean IHNV strains because of the lack of data, our study aimed to provide sufficient relevant data by sequencing the complete genome of the IHNV strain SNU1, which was recently isolated from a Korean rainbow trout farm. Moreover, we focused on expanding the perspectives on the phylogenesis of IHNV isolates from Korea and other Asian countries. IHNV was isolated from pooled hematopoietic tissue samples using Epithelioma papulosum cyprinid (EPC) cells, and phylogenetic analysis and genome study were conducted using complete G, N, and nonvirion (NV) gene sequences. Our main achievements were the development of a phylogenetic analytical method based on the NV gene and complete genome sequence analysis of the IHNV strain SNU1, which was compared with other Asian isolate sequences.
Collapse
|
9
|
Hoferer M, Akimkin V, Skrypski J, Schütze H, Sting R. Improvement of a diagnostic procedure in surveillance of the listed fish diseases IHN and VHS. JOURNAL OF FISH DISEASES 2019; 42:559-572. [PMID: 30779211 DOI: 10.1111/jfd.12968] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
Infectious haematopoietic necrosis (IHN) and viral haemorrhagic septicaemia (VHS) are OIE-listed and notifiable viral fish diseases which are controlled by eradication and surveillance programmes globally. The present study provides improved RT-qPCR procedures based on recently described OIE protocols. Improvements comprise the design of a new TaqMan® probe, replacing a TaqMan® MGB probe that turned out to show impaired binding. Reason for this is SNPs detected in the nucleoprotein N gene sequences of IHNV strains targeted by the RT-qPCR. Furthermore, the IHNV and VHSV RT-qPCR assays were realized as one-step and one-run procedures supplemented by an endogenous control system. The IHNV and VHSV RT-qPCR assays are characterized by a technical sensitivity of 19 and 190 gene equivalents (cRNA) and an analytical sensitivity of 2-7 and 13 TCID50 /ml, respectively. For verification purposes, 105 IHNV and 165 VHSV isolates and several non-targeted viral and bacterial pathogens were included and returned adequate results. However, in field samples divergent results left 14 samples of 154 undetected for IHNV and one sample of 127 for VHSV using cell culture. The study shows that RT-qPCR assays ensure facilitated and reliable testing on IHNV and VHSV in eradication and surveillance programmes.
Collapse
Affiliation(s)
- Marc Hoferer
- Chemisches und Veterinäruntersuchungsamt Stuttgart (Chemical and Veterinary Investigations Office Stuttgart), Fellbach, Germany
| | - Valerij Akimkin
- Chemisches und Veterinäruntersuchungsamt Stuttgart (Chemical and Veterinary Investigations Office Stuttgart), Fellbach, Germany
| | - Julia Skrypski
- Chemisches und Veterinäruntersuchungsamt Stuttgart (Chemical and Veterinary Investigations Office Stuttgart), Fellbach, Germany
| | - Heike Schütze
- Federal Research Institute for Animal Health, Institute of Infectology, Friedrich Loeffler Institute, Greifswald-Insel Riems, Germany
| | - Reinhard Sting
- Chemisches und Veterinäruntersuchungsamt Stuttgart (Chemical and Veterinary Investigations Office Stuttgart), Fellbach, Germany
| |
Collapse
|
10
|
Cao Y, Wang D, Li S, Xu L, Zhao J, Liu H, Lu T, Zhang Q. Identification and analysis of differentially expressed microRNAs in rainbow trout (Oncorhynchus mykiss) responding to infectious hematopoietic necrosis virus infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 88:28-36. [PMID: 29990507 DOI: 10.1016/j.dci.2018.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/06/2018] [Accepted: 07/06/2018] [Indexed: 06/08/2023]
Abstract
MicroRNAs (miRNAs) are a class of regulators essential for numerous biological processes. Infectious hematopoietic necrosis virus (IHNV) is one of the most important viral pathogens in salmon and trout. In this study, the miRNA expression profiles of rainbow trout upon IHNV infection were explored. In total, 392 known miRNAs and 936 novel miRNAs were identified. Twelve known and 13 novel miRNAs were differentially expressed between infected and uninfected fish. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses revealed that certain miRNA target genes were associated with biological regulation, the immune system, and signal transduction. In addition, over- and suppressed expression of miR-146a-3p, miR-155-5p, miR-216a-5p, and miR-499b-5p could respectively increase and decrease viral gene expression in cells and viral titers. MiR-146a-3p and miR-216a-5p inhibited the expression of type-I IFN and the Mx1 gene induced by IHNV. These results provide preliminary insights into the IHNV-host interactions mediated by miRNAs.
Collapse
Affiliation(s)
- Yongsheng Cao
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| | - Di Wang
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Shaowu Li
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Liming Xu
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Jingzhuang Zhao
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Hongbai Liu
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Tongyan Lu
- Laboratory of Fish Diseases, Department of Aquaculture, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Songfa Street No. 43, Daoli District, Harbin, 150070, China.
| | - Qiya Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
| |
Collapse
|
11
|
Xu L, Zhao J, Liu M, Kurath G, Breyta RB, Ren G, Yin J, Liu H, Lu T. Phylogeography and evolution of infectious hematopoietic necrosis virus in China. Mol Phylogenet Evol 2018; 131:19-28. [PMID: 30449717 DOI: 10.1016/j.ympev.2018.10.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 10/07/2018] [Indexed: 10/28/2022]
Abstract
Infectious hematopoietic necrosis virus (IHNV) is a well-known rhabdoviral pathogen of salmonid fish. In this study, a comprehensive analysis of 40 IHNV viruses isolated from thirteen fish farms in nine geographically dispersed Chinese provinces during 2012 to 2017 is presented. Identity of nucleotide and amino acid sequences among all the complete glycoprotein (G) genes from Chinese isolates was 98.0-100% and 96.7-100%, respectively. Coalescent phylogenetic analyses revealed that all the Chinese IHN virus characterized in this study were in a monophyletic clade that had a most recent common ancestor with the J Nagano (JN) subgroup within the J genogroup of IHNV. Within the Chinese IHNV clade isolates obtained over successive years from the same salmon fish farm clustered in strongly supported subclades, suggesting maintenance and diversification of virus over time within individual farms. There was also evidence for regional virus transmission within provinces, and some cases of longer distance transmission between distant provinces, such as Gansu and Yunnan. The data demonstrated that IHNV has evolved into a new subgroup in salmon farm environments in China, and IHNV isolates are undergoing molecular evolution within fish farms. We suggest that Chinese IHNV comprises a separate JC subgroup within the J genogroup of IHNV.
Collapse
Affiliation(s)
- Liming Xu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Jingzhuang Zhao
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China
| | - Miao Liu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Gael Kurath
- Western Fisheries Research Center, U.S. Geological Survey, 6505 NE 65th Street, Seattle, WA 98115, USA.
| | - Rachel B Breyta
- Western Fisheries Research Center, U.S. Geological Survey, 6505 NE 65th Street, Seattle, WA 98115, USA; University of Washington, School of Aquatic and Fishery Sciences, Seattle, WA 98195, USA.
| | - Guangming Ren
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Jiasheng Yin
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Hongbai Liu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China
| | - Tongyan Lu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| |
Collapse
|
12
|
Lijuan Z, Ningqiu L, Qiang L, Lihui L, Hongru L, Zhibin H, Xiaozhe F. An avirulent Micropterus salmoides rhabdovirus vaccine candidate protects Chinese perch against rhabdovirus infection. FISH & SHELLFISH IMMUNOLOGY 2018; 77:474-480. [PMID: 29604344 DOI: 10.1016/j.fsi.2018.03.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/26/2018] [Accepted: 03/27/2018] [Indexed: 06/08/2023]
Abstract
In order to develop live vaccine against Siniperca chuatsi rhabdovirus (SCRV) disease, an avirulent virus strain, designed as Micropterus salmoides rhabdovirus Sanshui (MSRV-SS), was selected from six fish rhabdovirus isolates (SCRV-QY、SCRV-SS、SCRV-GM、CMRV-FS、OMBRV-JM、MSRV-SS) by fish challenge assay. When Chinese perch (Siniperca chuatsi) were intraperitoneally injected live virus strain MSRV-SS, they were completely protected from virulent SCRV-GM challenge with a relative percent survival (RPS) of 100% on 18th day post vaccination. Then, the wild type MSRV-SS was purified by plaque clone assays, and the biological characteristics of the clonal strain designed as MSRV-SS-7 were investigated. The MSRV-SS-7 was avirulent to Chinese perch and its growth characteristic was similar to the MSRV-SS. The immune protection effects of clonal MSRV-SS-7 against virulent SCRV-GM were evaluated by intraperitoneal injection (IP) vaccination and immersion (IM) vaccination, their RPSs were all 100%. Altogether, these results indicate that MSRV-SS-7 is a potential live vaccine candidate against SCRV disease.
Collapse
Affiliation(s)
- Zhang Lijuan
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Li Ningqiu
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Lin Qiang
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Liu Lihui
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Liang Hongru
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Huang Zhibin
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Fu Xiaozhe
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
| |
Collapse
|
13
|
Xu L, Zhao J, Liu M, Ren G, Jian F, Yin J, Feng J, Liu H, Lu T. Bivalent DNA vaccine induces significant immune responses against infectious hematopoietic necrosis virus and infectious pancreatic necrosis virus in rainbow trout. Sci Rep 2017; 7:5700. [PMID: 28720888 PMCID: PMC5515949 DOI: 10.1038/s41598-017-06143-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/08/2017] [Indexed: 02/06/2023] Open
Abstract
Infectious hematopoietic necrosis virus (IHNV) and infectious pancreatic necrosis virus (IPNV) are important pathogens of salmon and trout. An active bivalent DNA vaccine was constructed with the glycoprotein gene of Chinese IHNV isolate Sn1203 and VP2-VP3 gene of Chinese IPNV isolate ChRtm213. Rainbow trout (5 g) were vaccinated by intramuscular injection with 1.0 µg of the bivalent DNA vaccine and then challenged with an intraperitoneal injection of IHNV, IPNV, or both, at 30 and 60 days post-vaccination (d.p.v.). High protection rates against IHNV were observed, with 6% and 10% cumulative mortality, respectively, compared with 90-94% in the mock-vaccinated groups. IPNV loads (531-fold and 135-fold, respectively) were significantly reduced in the anterior kidneys of the vaccinated trout. Significant protection against co-infection with IHNV and IPNV was observed, with cumulative mortality rates of 6.67% and 3.33%, respectively, compared with 50.0% and 43.3%, respectively, in the mock-vaccinated groups. No detectable infective IHNV or IPNV was recovered from vaccinated trout co-infected with IHNV and IPNV. The bivalent DNA vaccine increased the expression of Mx-1 and IFN-γ at 4, 7, and 15 d.p.v, and IgM at 21 d.p.v., and induced high titres (≥160) of IHNV and IPNV neutralizing antibodies at 30 and 60 d.p.v.
Collapse
Affiliation(s)
- Liming Xu
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Jingzhuang Zhao
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Miao Liu
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Guangming Ren
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Feng Jian
- Benxi AgriMarine Industries Inc., Benxi, 117000, P.R. China
| | - Jiasheng Yin
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Ji Feng
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Hongbai Liu
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China
| | - Tongyan Lu
- Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin, 150070, P.R. China.
| |
Collapse
|
14
|
Fu X, Lin Q, Liang H, Liu L, Huang Z, Li N, Su J. The biological features and genetic diversity of novel fish rhabdovirus isolates in China. Arch Virol 2017; 162:2829-2834. [PMID: 28550433 DOI: 10.1007/s00705-017-3416-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 04/08/2017] [Indexed: 11/27/2022]
Abstract
The Rhabdoviridae is a diverse family of negative-sense single-stranded RNA viruses which infects mammals, birds, reptiles, fish, insects and plants. Herein, we reported the isolation and characterization of 6 novel viruses from diseased fish collected from China including SCRV-QY, SCRV-SS, SCRV-GM, CmRV-FS, MsRV-SS, OmbRV-JM. The typical clinical symptom of diseased fish was hemorrhaging. Efficient propagation of these isolates in a Chinese perch brain cell line was determined by means of observation of cytopathic effect, RT-PCR and electron microscopy. Sequence alignment and phylogenetic analysis of the complete G protein sequences revealed that these isolates were clustered into one monophyletic lineage belonging to the species Siniperca chuatsi rhabdovirus.
Collapse
Affiliation(s)
- Xiaozhe Fu
- College of Animal Science and Technology, Northwest A&F University, Shanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, 712100, Shanxi, China
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China
| | - Qiang Lin
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China
| | - Hongru Liang
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China
| | - Lihui Liu
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China
| | - Zhibin Huang
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China
| | - Ningqiu Li
- Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou, 510380, Guangdong, China.
| | - Jianguo Su
- College of Animal Science and Technology, Northwest A&F University, Shanxi Key Laboratory of Molecular Biology for Agriculture, Yangling, 712100, Shanxi, China.
| |
Collapse
|
15
|
Jia P, Purcell MK, Pan G, Wang J, Kan S, Liu Y, Zheng X, Shi X, He J, Yu L, Hua Q, Lu T, Lan W, Winton JR, Jin N, Liu H. Analytical validation of a reverse transcriptase droplet digital PCR (RT-ddPCR) for quantitative detection of infectious hematopoietic necrosis virus. J Virol Methods 2017; 245:73-80. [PMID: 28347708 DOI: 10.1016/j.jviromet.2017.03.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 03/23/2017] [Accepted: 03/23/2017] [Indexed: 12/14/2022]
Abstract
Infectious hematopoietic necrosis virus (IHNV) is an important pathogen of salmonid fishes. A validated universal reverse transcriptase quantitative PCR (RT-qPCR) assay that can quantify levels of IHNV in fish tissues has been previously reported. In the present study, we adapted the published set of IHNV primers and probe for use in a reverse-transcriptase droplet digital PCR (RT-ddPCR) assay for quantification of the virus in fish tissue samples. The RT-ddPCR and RT-qPCR assays detected 13 phylogenetically diverse IHNV strains, but neither assay produced detectable amplification when RNA from other fish viruses was used. The RT-ddPCR assay had a limit of detection (LOD) equating to 2.2 plaque forming units (PFU)/μl while the LOD for the RT-qPCR was 0.2 PFU/μl. Good agreement (69.4-100%) between assays was observed when used to detect IHNV RNA in cell culture supernatant and tissues from IHNV infected rainbow trout (Oncorhynchus mykiss) and arctic char (Salvelinus alpinus). Estimates of RNA copy number produced by the two assays were significantly correlated but the RT-qPCR consistently produced higher estimates than the RT-ddPCR. The analytical properties of the N gene RT-ddPCR test indicated that this method may be useful to assess IHNV RNA copy number for research and diagnostic purposes. Future work is needed to establish the within and between laboratory diagnostic performance of the RT-ddPCR assay.
Collapse
Affiliation(s)
- Peng Jia
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China; Institute of Military Veterinary Medicine, Academy of Military Medical Sciences of PLA, Jilin, 130117, People's Republic of China
| | - Maureen K Purcell
- US Geological Survey, Western Fisheries Research Center, 6505 Northeast 65th Street, Seattle, WA 98115, USA
| | - Guang Pan
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Jinjin Wang
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Shifu Kan
- Shenzhen Supervision and Testing Center for Quality and Safety of Agri-products, Shenzhen, 518005, People's Republic of China
| | - Yin Liu
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Xiaocong Zheng
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Xiujie Shi
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Junqiang He
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Li Yu
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Qunyi Hua
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Tikang Lu
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - Wensheng Lan
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China
| | - James R Winton
- US Geological Survey, Western Fisheries Research Center, 6505 Northeast 65th Street, Seattle, WA 98115, USA
| | - Ningyi Jin
- Institute of Military Veterinary Medicine, Academy of Military Medical Sciences of PLA, Jilin, 130117, People's Republic of China
| | - Hong Liu
- Shenzhen Entry-exit Inspection and Quarantine Bureau, Shenzhen, 518045, People's Republic of China; Shenzhen Academy of Inspection and Quarantine Sciences, Shenzhen, 518045, People's Republic of China.
| |
Collapse
|
16
|
Xu L, Zhao J, Liu M, Kurath G, Ren G, Lapatra SE, Yin J, Liu H, Feng J, Lu T. A effective DNA vaccine against diverse genotype J infectious hematopoietic necrosis virus strains prevalent in China. Vaccine 2017; 35:2420-2426. [PMID: 28343776 DOI: 10.1016/j.vaccine.2017.03.047] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/06/2017] [Accepted: 03/11/2017] [Indexed: 01/06/2023]
Abstract
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 100ng dose of the vaccine conferred almost full protection to rainbow trout fry (3g) against waterborne or intraperitoneal injection challenge with IHNV strain SD-12 as early as 4days post-vaccination (d.p.v.), and significant protection was still observed at 180d.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 7d.p.v. Similar levels of neutralizing antibodies were determined with each of the Chinese IHNV strains at 60 and 180d.p.v. This DNA vaccine should play an important role in the control of IHN in China.
Collapse
Affiliation(s)
- Liming Xu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Jingzhuang Zhao
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Miao Liu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Gael Kurath
- Western Fisheries Research Center, USGS, Seattle, WA 98115, USA.
| | - Guangming Ren
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | | | - Jiasheng Yin
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Hongbai Liu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| | - Jian Feng
- Benxi Agrimarine Company Limited, Benxi 117000, PR China.
| | - Tongyan Lu
- Heilongjiang River Fishery Research Institute Chinese Academy of Fishery Sciences, Harbin 150070, PR China.
| |
Collapse
|
17
|
Bayliss SC, Verner-Jeffreys DW, Bartie KL, Aanensen DM, Sheppard SK, Adams A, Feil EJ. The Promise of Whole Genome Pathogen Sequencing for the Molecular Epidemiology of Emerging Aquaculture Pathogens. Front Microbiol 2017; 8:121. [PMID: 28217117 PMCID: PMC5290457 DOI: 10.3389/fmicb.2017.00121] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 01/17/2017] [Indexed: 01/23/2023] Open
Abstract
Aquaculture is the fastest growing food-producing sector, and the sustainability of this industry is critical both for global food security and economic welfare. The management of infectious disease represents a key challenge. Here, we discuss the opportunities afforded by whole genome sequencing of bacterial and viral pathogens of aquaculture to mitigate disease emergence and spread. We outline, by way of comparison, how sequencing technology is transforming the molecular epidemiology of pathogens of public health importance, emphasizing the importance of community-oriented databases and analysis tools.
Collapse
Affiliation(s)
- Sion C Bayliss
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath Bath, UK
| | | | - Kerry L Bartie
- Institute of Aquaculture, University of Stirling Stirling, UK
| | - David M Aanensen
- Department of Infectious Disease Epidemiology, School of Public Health, Imperial College LondonLondon, UK; The Centre for Genomic Pathogen Surveillance, Wellcome Genome CampusCambridge, UK
| | - Samuel K Sheppard
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath Bath, UK
| | - Alexandra Adams
- Institute of Aquaculture, University of Stirling Stirling, UK
| | - Edward J Feil
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath Bath, UK
| |
Collapse
|
18
|
Phylogenetic relationships of Iranian infectious hematopoietic necrosis virus of rainbow trout (Oncorhynchus mykiss) based on the glycoprotein gene. Arch Virol 2015; 161:657-63. [PMID: 26602428 DOI: 10.1007/s00705-015-2684-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 11/09/2015] [Indexed: 10/22/2022]
Abstract
Infectious hematopoietic necrosis virus (IHNV), a member of family Rhabdoviridae and genus Novirhabdoviridae, causes a highly lethal disease of salmon and trout. In Iran IHNV was first detected in 2001 on farms rearing rainbow trout (Oncorhynchus mykiss). To evaluate the genetic relationships of IHNV from northern and western Iran, the sequences of a 651-nt region of the glycoprotein gene were determined for two Iranian isolates. These sequences were analyzed to evaluate their genetic relatedness to worldwide isolates representing the five known genogroups of IHNV. Iranian isolates were most closely related to European isolates within the genogroup E rather than those of North American genogroups U, M and L, or the Asian genogroup J. It appears that Iranian IHNV was most likely introduced to Iran from a source in Europe by the movement of contaminated fish eggs.
Collapse
|