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Yang S, Mkingule I, Liu L, Chen W, Yuan X, Ma Z, Liang L, Qian S, Huang M, Fei H. Protective efficacy evaluation of immunogenic protein AHA_3793 of Aeromonas hydrophila as vaccine candidate for largemouth bass Micropterus salmoides. JOURNAL OF OCEANOLOGY AND LIMNOLOGY 2022; 41:392-400. [PMID: 36287822 PMCID: PMC9584254 DOI: 10.1007/s00343-022-1326-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/13/2022] [Indexed: 06/16/2023]
Abstract
Aeromonas hydrophila is a Gram-negative pathogen that can infect various fish, including largemouth bass (Micropterus salmoides), which have caused huge economic losses. In present study, largemouth bass anti-A. hydrophila antibodies were produced, then a highly immunogenic outer membrane proteins, AHA_3793, was identified by combined western blotting and mass spectrometry analysis. Moreover, AHA_3793 was expressed, and its immunogenicity was further verified by western blotting. Subsequently, the protective efficacy of AHA_3793 were evaluated in largemouth bass. The results showed that rAHA_3793 could produce a relative percentage survival (RPS) of 61.76% for largemouth bass against A. hydrophila challenge. ELISA analysis showed the specific serum antibodies of largemouth bass against rAHA_3793 and A. hydrophila in vaccinated group in weeks 4 and 5 after immunization were significantly higher than those in control group, which suggested that rAHA_3793 induced production of specific serum antibodies against rAHA_3793 and A. hydrophila. The qRT-PCR analysis showed that expressions of CD4-2 and MHC IIα were also significantly up-regulated after immunization. These results collectively demonstrated that rAHA_3793 could induce a strong humoral immune response of largemouth bass, and then produce high immune protection effects against A. hydrophila infection.
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Affiliation(s)
- Shun Yang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Idefonce Mkingule
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Long Liu
- Zhejiang Development & Planning Institute, Hangzhou, 310012 China
| | - Wenqi Chen
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Xiangyu Yuan
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Zixuan Ma
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Liang Liang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Shichao Qian
- Huzhou Baijiayu Biotech Co., Ltd., Huzhou, 313000 China
| | - Mengmeng Huang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
| | - Hui Fei
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018 China
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Parchemin C, Tapissier-Bontemps N, Sasal P, Faliex E. Anguilla sp. diseases diagnoses and treatments: The ideal methods at the crossroads of conservation and aquaculture purposes. JOURNAL OF FISH DISEASES 2022; 45:943-969. [PMID: 35526273 DOI: 10.1111/jfd.13634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
Anguilla anguilla, A. japonica and A. rostrata are the most fished and consumed eel species. However, these species are Critically Endangered, Endangered and Endangered, respectively. A combination of factors is thought to be responsible for their decline including fisheries, climate change, habitat destruction, barriers to migration, pollution and pathogens. Among them, viruses, bacteria and parasites are causing weakening of wild eels and serious economic losses for fishermen and eel farmers. Early detection of pathogens is essential to provide appropriate responses both for conservation reasons and to limit economic losses. Classic diagnosis approaches are time consuming and invasive and usual treatments, for example, antipathogenic substances are becoming obsolete because of pathogen resistance and environmental impact problems. The need for early and non-invasive diagnostic methods as well as effective and environmentally friendly treatments has increased. Vaccine development and diet supplementation have known a growing interest since their use could allow prevention of diseases. In this review, we summarize the main pathogens-viruses, bacteria and parasites-of the three northern temperate eel species, the methods used to detect these pathogens and the different treatments used. We discussed and highlighted the need for non-invasive, rapid and efficient detection methods, as well as effective and environmentally friendly treatments for both conservation and aquaculture purposes.
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Affiliation(s)
- Christelle Parchemin
- Centre de Recherches Insulaires et Observatoire de l'Environnement (CRIOBE), Université de Perpignan, Perpignan Cedex, France
- Centre de Formation et de Recherche sur les Environnements Méditerranéens (CEFREM), Université de Perpignan, Perpignan Cedex, France
| | - Nathalie Tapissier-Bontemps
- Centre de Recherches Insulaires et Observatoire de l'Environnement (CRIOBE), Université de Perpignan, Perpignan Cedex, France
| | - Pierre Sasal
- Centre de Recherches Insulaires et Observatoire de l'Environnement (CRIOBE), Université de Perpignan, Perpignan Cedex, France
| | - Elisabeth Faliex
- Centre de Formation et de Recherche sur les Environnements Méditerranéens (CEFREM), Université de Perpignan, Perpignan Cedex, France
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3
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Feng J, Xu Y, Lin P, Peng X, Wang Y, Zhang Z. Identification of IκBα in Japanese eel Anguilla japonica that impairs the IKKα-dependent activation of NF-κB, AP1, and type I IFN signaling pathways. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 122:104044. [PMID: 33915176 DOI: 10.1016/j.dci.2021.104044] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 02/08/2021] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
As a member of inhibitory κB family (IκB) family, IκBα is best-characterized and plays a central negative feedback regulator of NF-κB pathway in mammals, but the information about IκBα in the regulation of immune responses is still limited in teleost fishes. In the present study, the full-length cDNA of an IκBα homologue, AjIκBα, was cloned by 5' and 3' SMART RACE from Japanese eel, and its characteristics of expression in response to various PAMPs and A. hydrophila infection were investigated both in vivo and in vitro using quantitative real-time polymerase chain reaction (qRT-PCR). In addition, the subcellular localization of AjIκBα GFP fusion protein and the induction of AjIκBα alone or co-expression with Japanese eel IKKα (AjIKKα) in the activation of NF-κB, type I IFN and AP1 performed using Dual-Glo luciferase assay system were also detected. Sequence comparison analysis revealed that AjIκBα has typical conserved domains, including the N-terminal conserved degradation motif, the ankyrin repeats, and the C-terminal PEST domain. The predicted three-dimensional structure of AjIκBα is similar to that of human IκBα. qRT-PCR analysis revealed a broad expression for AjIκBα in a wide range of tissues, with the highest expression in the spleen, followed by intestine, liver, gills, skin, kidney, and with a lower expression in the heart and muscle. The AjIκBα expressions in the kidney, spleen, and especially in liver were significantly induced following injection with Gram-negative bacterial component LPS, the viral mimic poly I:C and Aeromonas hydrophila infection. In vitro, the AjIκBα transcripts of Japanese eel liver cells were significantly enhanced by the treatment of LPS, poly I:C, or the stimulation of different concentration of Aeromonas hydrophil. Luciferase assays demonstrated that not only could the AjIκBα expression significantly decrease the activation of NF-κB, AP1, and IFNβ-responsive promoters in HEK293 cells and EPC cells, but also robustly inhibited the activity of these three promoters in HEK293 cells or NF-κB and AP1-responsive promoters in EPC cells induced by AjIKKα. Additionally, subcellular localization studies showed that AjIκBα was evenly distributed in the cytoplasm and nucleus both in HEK293 cells and EPC cells under natural state. AjIκBα was found to aggregate into spots in the cytoplasm and nucleus stimulated by LPS or mostly aggregate into nucleus with the treatment of poly I:C in HEK293 cells, whereas the elevated expression of AjIκBα was observed in the cytoplasm of EPC cells upon the stimulation of poly I:C. These results collectively indicated that AjIκBα function as an important negative regulation in innate immunity of host against antibacterial and antiviral infection likely via the inhibition of the activation of NF-κB, AP1, and type I IFN signaling pathways.
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Affiliation(s)
- Jianjun Feng
- Engineer Research Center of Eel Modern Industry Technology, Ministry of Education, China; College of Fisheries, Jimei University, Xiamen, 361021, Fujian Province, China.
| | - Yuankai Xu
- Engineer Research Center of Eel Modern Industry Technology, Ministry of Education, China; Ningbo Institute of Oceanography, Ningbo, 315832, China
| | - Peng Lin
- Engineer Research Center of Eel Modern Industry Technology, Ministry of Education, China; College of Fisheries, Jimei University, Xiamen, 361021, Fujian Province, China
| | - Xinwei Peng
- Engineer Research Center of Eel Modern Industry Technology, Ministry of Education, China; College of Fisheries, Jimei University, Xiamen, 361021, Fujian Province, China
| | - Yilei Wang
- Engineer Research Center of Eel Modern Industry Technology, Ministry of Education, China; College of Fisheries, Jimei University, Xiamen, 361021, Fujian Province, China
| | - Ziping Zhang
- College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
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Awan F, Ali MM, Dong Y, Yu Y, Zeng Z, Liu Y. In Silico Analysis of Potential Outer Membrane Beta-Barrel Proteins in Aeromonas hydrophila Pangenome. Int J Pept Res Ther 2021; 27:2381-2389. [PMID: 34335123 PMCID: PMC8310902 DOI: 10.1007/s10989-021-10259-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2021] [Indexed: 11/30/2022]
Abstract
Outer membrane proteins (OMPs) of Aeromonas hydrophila have a variety of functional roles in virulence and pathogenesis and represent promising targets for vaccine development. The main objective of this study was to develop an in-silico model of beta-barrel OMP present among the valid A. hydrophila pangenomes (n = 22). With a program named the β-barrel Outer Membrane Protein Predictor (BOMP), total beta-barrel OMPs (n = 3127) were predicted across 22 genomes with the estimated median number of 64 per genome. In pangenome analysis, only 32 OMPs were found to be conserved. These beta-barrel OMPs also showed variations among source of isolation, COG and KEGG classes. Among 32 conserved OMPs, a highly antigenic protein was identified by utilizing Vaxijen. With B cell epitope predictions, two fragments of amino acid sequences i.e. GLTLGAQFTGNNDPQNADRSN (21 mer) and FKPSLAYLRTDVKDNARGI DDTATEY (26 mer) bearing B-cell binding sites were selected. Further, an epitope (12 amino acids: GLTLGAQFTGNN) that complexes to maximum MHC alleles with a higher antigenicity was determined. The analysis of evolutionary forces on the identified OMP sequence and epitope indicated that none of basic amino acid sites has shown significantly different substitution ratios. This conserved protein and epitope will be helpful in developing a vaccine that may be effective against all the A. hydrophila strains. Also, this study provides a theoretical basis for vaccine design against other pathogenic bacteria.
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Affiliation(s)
- Furqan Awan
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China.,College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Department of Epidemiology and Public Health, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Muddassir Ali
- Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Yuhao Dong
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Yong Yu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Zhenling Zeng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yongjie Liu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
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Zhao J, Wu L, Zhai S, Lin P, Guo S. Construction expression and immunogenicity of a novel trivalent outer membrane protein (OmpU-A-II) from three bacterial pathogens in Japanese eels (Anguilla japonica). JOURNAL OF FISH DISEASES 2020; 43:519-529. [PMID: 32285473 DOI: 10.1111/jfd.13132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 06/11/2023]
Abstract
Vibrio vulnificus, Edwardsiella anguillarum and Aeromonas hydrophila are three common bacterial pathogens in cultivated eels. To protect farming eels from infection by these pathogens, a trivalent outer membrane protein (OMP) containing partial sequences of OmpU from V. vulnificus, OmpA from E. anguillarum and OmpII from A. hydrophila was expressed and purified; then, the OMP was used as a vaccine to immunize Japanese eels (Anguilla japonica). Whole-blood cell proliferation, antibody titres and complement and lysozyme activities were detected at different days post-immunization (dpi), and the relative per cent survival (RPS) was determined after eels were infected with V. vulnificus, E. anguillarum or A. hydrophila at 28 dpi. The results showed that the OMP significantly stimulates the antibody titres. At 14 days after the challenge (i.e. at 28 dpi), the RPS of OMP against V. vulnificus, E. anguillarum and A. hydrophila was 20%, 70% and 11.1%, respectively. The construction, expression and immunogenicity of a trivalent Omp were reported for the first time, and this study will provide a valuable reference for the development of fish multiplex vaccines.
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Affiliation(s)
- Jinping Zhao
- Fisheries College, Jimei University, Xiamen, China
- Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, China
| | - Liqun Wu
- College of Overseas Education, Jimei University, Xiamen, China
| | - Shaowei Zhai
- Fisheries College, Jimei University, Xiamen, China
- Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, China
| | - Peng Lin
- Fisheries College, Jimei University, Xiamen, China
- Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, China
| | - Songlin Guo
- Fisheries College, Jimei University, Xiamen, China
- Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, China
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6
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Guo S, He L, Wu L, Xiao Y, Zhai S, Yan Q. Immunization of a novel bivalent outer membrane protein simultaneously resisting Aeromonas hydrophila, Edwardsiella anguillarum and Vibrio vulnificus infection in European eels (Angullia angullia). FISH & SHELLFISH IMMUNOLOGY 2020; 97:46-57. [PMID: 31846771 DOI: 10.1016/j.fsi.2019.12.044] [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: 09/01/2019] [Revised: 12/08/2019] [Accepted: 12/13/2019] [Indexed: 05/26/2023]
Abstract
In cultivated European eels, Aeromonas hydrophila, Edwardsiella anguillarum and Vibrio vulnificus are three important bacterial pathogens. In this study, European eels (Anguilla anguilla) were immunized by the bivalent expression products of the outer membrane protein (Omp) gene from A. hydrophila (OmpⅡ) and E. anguillarum (OmpA), and the effects of the bivalent protein (rOmpⅡ-A) on the immune function of the European eel were detected. Three hundred eels were divided average into three groups of PBS, adjuvant and rOmp. Eels of three goups were injected intraperitoneal with 0.2 mL of PBS (0.01 mol/L, pH7.4), PBS + F (PBS mixed equal volume of freund's uncomplete adjuvant) or rOmpⅡ-A (1 mg mL-1 rOmpⅡ-A mixed equal volume of freund's uncomplete adjuvant). Four immune-related genes expression, proliferation of whole blood cells, serum and skin mucus antibody titer, superoxide dismutase (SOD) activity and the relative percent of survival (RPS) were studied at different days (or hours) post the immunization. The results showed that the igm, lysC, mhc2 and sod gene in the liver, spleen, kidney and intestine tract were significant increased in the Omp group; On the 28 day post the immunization (dpi), blood cell proliferation was increased in the Omp group, and on the 14, 21, 28 and 42 dpi, antibody titers in serum and mucus of the Omp group were significantly higher than that of the PBS and adjuvant group, regardless of coating with bacteria or Omp antigen. The SOD activity of Omp group increased significantly in liver, kidney, skin mucus and serum from 14 to 42 dpi, especially in serum. Eels chanllenged by A. hydrophila, E. anguillarum and V. vulnificus in the bivalent Omp group showed the RPS were 83.33%, 55.56% and 44.44%, respectively. The results of this study showed that immunization of the bivalent Omp could effectively improve the immune function of European eels, and produced effectively protection to A. hydrophila and E. anguillarum infection. Simultaneously, the bivalent Omp also produced distinct cross-protection to the eels challenged by V. vulnificus.
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Affiliation(s)
- Songlin Guo
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, 361021, China
| | - Le He
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, 361021, China
| | - Liqun Wu
- College of Overseas Education, Jimei University, Xiamen, 361021, China
| | - Yiqun Xiao
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, 361021, China
| | - Shaowei Zhai
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, 361021, China
| | - Qinpi Yan
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, 361021, China.
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7
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He L, Wu L, Tang Y, Lin P, Zhai S, Xiao Y, Guo S. Immunization of a novel outer membrane protein from Aeromonas hydrophila simultaneously resisting A. hydrophila and Edwardsiella anguillarum infection in European eels (Angullia angullia). FISH & SHELLFISH IMMUNOLOGY 2020; 97:300-312. [PMID: 31866448 DOI: 10.1016/j.fsi.2019.12.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/13/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
In cultivated European eels, Aeromonas hydrophila, Edwardsiella anguillarum and Vibrio vulnificus are three important bacterial pathogens. In this study, an expressed recombinant Outer membrane proteinⅡ (rOmpⅡ) from A. hydrophila was intraperitoneally injected into European eels (Angullia angullia). All examined eels were equally divided into three groups. One group was injected with PBS only (PBS group), one group was injected with 1:1 mixture of PBS and Freund's incomplete adjuvant (PBS + F, adjuvant group), and the third group was injected with 1:1 mixture of 1 mg mL-1 rOmpⅡ and Freund's incomplete adjuvant (rOmpⅡ+F, OmpⅡ group). The immunogenicity of OmpⅡ was studied by detecting the expression of 4 immune-related genes, stimulation index (SI) of the whole blood cell, serum antibody titer, lysozyme and Superoxide Dismutase (SOD) activity, and relative percent of survival (RPS) rate. The results showed that gene expression of MHC-Ⅱ, LysC, SOD and IgM in the OmpⅡ group significantly increased in liver, spleen, kidney and intestine. At 28 days post the immunization (dpi), the SI of whole blood cells in the OmpⅡ group increased significantly; at 14, 21, 28 and 42 dpi, the serum antibody titers against A. hydrophila and E. anguillarum in the OmpⅡ group were significantly higher than that of the PBS and the adjuvant group; the SOD in the OmpⅡ group was found increased significantly in liver, kidney, mucus and serum. On the 28 dpi, eels were challenged by A. hydrophila, E. anguillarum and V. vulnificus for cross protection study. The results showed that the RPS of the OmpⅡ group were 83.33%, 55.56% and 33.33% respectively. These results showed that the expressed OmpⅡ from A. hydrophila significantly improve the immune function of Europena eels and their resistance to the infection of A. hydrophila and E. anguillarum simultaneously.
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Affiliation(s)
- Le He
- Fisheries College of Jimei University, Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education, Xiamen, 361021, China
| | - LiQun Wu
- College of Overseas Education, Jimei University, Xiamen, 361021, China
| | - YiJun Tang
- Yijun Tang, Department of Chemistry, University of Wisconsin Oshkosh, 800 Algoma Blvd., Oshkosh, WI, USA
| | - Peng Lin
- Fisheries College of Jimei University, Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education, Xiamen, 361021, China
| | - ShaoWei Zhai
- Fisheries College of Jimei University, Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education, Xiamen, 361021, China
| | - YiQun Xiao
- Fisheries College of Jimei University, Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education, Xiamen, 361021, China
| | - SongLin Guo
- Fisheries College of Jimei University, Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education, Xiamen, 361021, China.
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Current State of Modern Biotechnological-Based Aeromonas hydrophila Vaccines for Aquaculture: A Systematic Review. BIOMED RESEARCH INTERNATIONAL 2019; 2019:3768948. [PMID: 31467887 PMCID: PMC6699303 DOI: 10.1155/2019/3768948] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 07/09/2019] [Indexed: 12/17/2022]
Abstract
This systematic review describes what “the cutting edge vaccines for Aeromonas hydrophila are”. The focus is on types of high tech biotechnological based vaccines, target gene or antigen in developing these vaccines, and challenge model fish species used in vaccines efficacy testing. Vaccines delivery methods, immune response, and their efficacy, adjuvant or carrier systems used, and the overall experimental setup or design of the vaccines under investigation are also described. The search for the original papers published between 2009 and 2018 was conducted in June of 2018, using the PubMed and Google scholar electronic database. Twenty-three (23/4386) studies were included in the final assembly using PRISMA guidelines (Protocol not registered). Recombinant protein vaccines were the highly experimented type of the modern biotechnological based vaccines identified in the selected studies (16/23; 70%). Outer membrane proteins (OMPs) of different β-barrels were shown to be a potential antigenic entity for A. hydrophila vaccines (57%). Intraperitoneal route with conventional carries or adjuvants was the highly applied delivery system while very few studies used herbal based vaccine adjuvants and nanomaterial as a vaccine carrier. Variation was observed in terms of protection levels in the selected studies. The experimental designs partly contributed to the observed variation. Therefore, recombinant vaccines that use new carrier system technologies and delivered through oral route in feeds would have been of great value for use in the prevention and control of A. hydrophila infections in fish. Despite the usefulness as academic tools to identify what is important in pathogenicity of the etiological agent to the host fish, these vaccines are only economically viable in very high-value animals. Therefore, if vaccination is a good option for A. hydrophila group, then simple autogenous vaccines based on accurate typing and evidence-based definition of the epidemiological unit for their use would be the most viable approach in terms of both efficacy and economic feasibility especially in low and middle-income countries (LMIC).
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Abdelhamed H, Banes M, Karsi A, Lawrence ML. Recombinant ATPase of Virulent Aeromonas hydrophila Protects Channel Catfish Against Motile Aeromonas Septicemia. Front Immunol 2019; 10:1641. [PMID: 31379840 PMCID: PMC6646738 DOI: 10.3389/fimmu.2019.01641] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 07/01/2019] [Indexed: 11/13/2022] Open
Abstract
Channel catfish farming dominates the aquaculture industry in the United States. However, epidemic outbreaks of motile Aeromonas septicemia (MAS), caused by virulent Aeromonas hydrophila (vAh), have become a prominent problem in the catfish industry. Although vaccination is an effective preventive method, there is no vaccine available against MAS. Recombinant proteins could induce protective immunity. Thus, in this work, vAh ATPase protein was expressed, and its protective capability was evaluated in catfish. The purified recombinant ATPase protein was injected into catfish, followed by experimental infection with A. hydrophila strain ML09-119 after 21 days. Results showed catfish immunized with ATPase exhibited 89.16% relative percent survival after challenge with A. hydrophila strain ML09-119. Bacterial concentrations in liver, spleen, and anterior kidney were significantly lower in vaccinated fish compared with the non-vaccinated sham group at 48 h post-infection (p < 0.05). Catfish immunized with ATPase showed a significant (p < 0.05) higher antibody response compared to the non-vaccinated groups. Overall, ATPase recombinant protein has demonstrated potential to stimulate protective immunity in catfish against virulent A. hydrophila infection.
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Affiliation(s)
- Hossam Abdelhamed
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS, United States
| | - Michelle Banes
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS, United States
| | - Attila Karsi
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS, United States
| | - Mark L Lawrence
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Starkville, MS, United States
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Xiong J, Huang B, Guo SL, Xu JS, Huang W. A novel multiplex PCR assay for rapid detection of virulent Aeromonas in cultured eels. J Appl Microbiol 2019; 127:418-428. [PMID: 31136041 DOI: 10.1111/jam.14311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 01/01/2023]
Abstract
AIMS Under intensive and stressful aquaculture conditions, cultured eels are highly susceptible to virulent Aeromonas sp. infections. To rapidly and simultaneously confirm Aeromonas isolate and its virulence, a two-tube multiplex PCR (mPCR) assay incorporating gyrB gene for genus-specific recognition and seven major virulence genes for virulence assessment was developed. METHODS AND RESULTS Eight pairs of primers were designed and divided into two groups-gyrB, ahpA, epr and aerA in tube 1 and alt, act, ast and hlyA in tube 2. The optimized mPCR conditions were the same except for their final concentrations. The specificity of the mPCR was validated by the extracted DNA of 10 Aeromonas and 8 non-Aeromonas species, or mixed DNA templates. Detection limits were determined to be 200 copies per μl in tube 1 and 20 copies per μl in tube 2. The mPCR reproducibility was tested by both artificial challenge and clinical samples. CONCLUSIONS The results showed this two-tube mPCR assay was rapid, specific, sensitive and reliable. SIGNIFICANCE AND IMPACT OF THE STUDY To our knowledge, this is the first report to distinguish virulent Aeromonas isolates from nonvirulent ones by seven popular and major virulence genes at the genus-specific level. And it will be useful for large-scale screening of virulent Aeromonas sp. in cultured eels.
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Affiliation(s)
- J Xiong
- Fisheries College, Jimei University, Xiamen, China.,Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education of the People's Republic of China, Xiamen, China
| | - B Huang
- Fisheries College, Jimei University, Xiamen, China.,Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education of the People's Republic of China, Xiamen, China
| | - S-L Guo
- Fisheries College, Jimei University, Xiamen, China.,Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education of the People's Republic of China, Xiamen, China
| | - J-S Xu
- Fisheries College, Jimei University, Xiamen, China.,Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education of the People's Republic of China, Xiamen, China
| | - W Huang
- Fisheries College, Jimei University, Xiamen, China.,Engineering Research Center of the Modern Technology for Eel Industry, Ministry of Education of the People's Republic of China, Xiamen, China
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11
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Han B, Xu K, Liu Z, Ge W, Shao S, Li P, Yan N, Li X, Zhang Z. Oral yeast-based DNA vaccine confers effective protection from Aeromonas hydrophila infection on Carassius auratus. FISH & SHELLFISH IMMUNOLOGY 2019; 84:948-954. [PMID: 30445667 DOI: 10.1016/j.fsi.2018.10.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/16/2018] [Accepted: 10/24/2018] [Indexed: 06/09/2023]
Abstract
Our previous study has demonstrated that recombinant yeast can induce specific immune responses in Carassius auratus and may serve as a potential carrier for oral DNA vaccines in aquaculture. In this study, we further developed an effective yeast-based oral DNA vaccine against the bacteria Aeromonas hydrophila, which was expected to provide protection from the motile aeromonad septicemia (MAS). First, two candidate antigen genes, ompG and omp48, were cloned from the Aeromonas hydrophila genome DNA. Then, relative yeast-eukaryote shuttle vectors were constructed and their expression in eukaryotes was validated. Next, crucian carps were orally administered with ompG or omp48 recombinant yeast, and the expression of the genes in the intestinal mucosa was confirmed by immunohistochemistry (IHC). The specific immune responses were further detected by Western blot and enzyme-linked immunosorbent assay (ELISA). The ELISA results showed that the production of the OVA-specific antibody in the OVA-ompG group was significantly higher than that of the OVA-omp48 group, indicating that the OVA-ompG group elicited obviously stronger immune response than OVA-omp48. Finally, the challenge experiment against Aeromonas hydrophila infection demonstrated decreased fish mortality rate after the oral administration of the OVA-ompG yeast vaccine. In conclusion, our work provided a framework for the further development of oral yeast-based fishery vaccines.
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Affiliation(s)
- Baoquan Han
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Kun Xu
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China.
| | - Zhongtian Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Wei Ge
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Simin Shao
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Pengcheng Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Nana Yan
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Xinyi Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Zhiying Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China.
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12
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Guo S, Hu L, Feng J, Lin P, He L, Yan Q. Immunogenicity of a bivalent protein as a vaccine against Edwardsiella anguillarum and Vibrio vulnificus in Japanese eel (Anguilla japonica). Microbiologyopen 2018; 8:e00766. [PMID: 30444580 PMCID: PMC6562130 DOI: 10.1002/mbo3.766] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/13/2018] [Accepted: 10/16/2018] [Indexed: 02/03/2023] Open
Abstract
The OMPs A (OmpA)—of Edwardsiella anguillarum and OmpU of V. vulnificus have been proven to be good antigens. In this study, after construction of a vector, a new recombinant Omp (rOMP) containing both OmpA and OmpU was expressed and purified. Then, the Japanese eels (Anguilla japonica) were intraperitoneally (i.p.) injected with the phosphate‐buffered saline (PBS group), formalin‐killed‐cell (FKC group) or the recombinant Omp (rOMP group). The stimulation index of the whole blood cells in eels from FKC group was significantly higher than the eels from PBS and rOMP groups at 28 dpi; serum titers of anti‐E. anguillarum and anti‐V. vulnificus antibody of eels from FKC and rOMP group increased significantly at 21 and 28 dpi; in the rOMP group, eels serum titer stayed at a high level on 42 dpi. The activities of lysozyme in skin mucus, liver, kidney, and serum in three groups exhibited considerable changes. The relative percent survival (RPS) rate of eels from rOMP group were 100% and 83% when challenged with V. vulnificus or E. anguillarum. These results indicated that inoculation of rOMP would protect Japanese eels against the infection by E. anguillarum and V. vulnificus.
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Affiliation(s)
- Songlin Guo
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
| | - Linlin Hu
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
| | - Jianjun Feng
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
| | - Peng Lin
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
| | - Le He
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
| | - Qingpi Yan
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Xiamen, China.,Jimei University, Fujian, Xiamen, China
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13
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Yadav SK, Dash P, Sahoo PK, Garg LC, Dixit A. Modulation of immune response and protective efficacy of recombinant outer-membrane protein F (rOmpF) of Aeromonas hydrophila in Labeo rohita. FISH & SHELLFISH IMMUNOLOGY 2018; 80:563-572. [PMID: 29958980 DOI: 10.1016/j.fsi.2018.06.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/17/2018] [Accepted: 06/25/2018] [Indexed: 06/08/2023]
Abstract
The outer-membrane proteins (OMPs) of Aeromonas hydrophila, an imperative fish pathogen accountable for massive economic losses to aquaculture industry, are found to be immunogenic and considered as potential vaccine candidates. In spite of development in the formulation of vaccine candidates against Aeromonas infection, no commercial preparation has been done so far; in addition, the molecular mechanisms of immunoprotection induced by various vaccine formulations in Indian major carp, Labeo rohita, are little known. The present study was undertaken to evaluate the modulation of immunity and expression of immune-related genes post-rOmpF (recombinant outer-membrane protein of A. hydrophila, a novel vaccine candidate) immunization and protective efficacy after A. hydrophila challenge. The rOmpF-immunized fish showed a variable expression of the immune-related genes, viz. toll-like receptor 22 (TLR), complement component 3 (C3), chemokine (CXCa), tumor necrosis factor-α (TNFα), interleukin 1β (IL-1β), manganese superoxide dismutase (MnSOD) and natural killer enhancing factor (NKEF) in the head kidney tissues, when compared to the control group at different time intervals post-vaccination. A significant increase in serum hemolysin titer, ceruloplasmin level and myeloperoxidase activity was observed on day 140 post immunization. Also, bacterial agglutination titer and antiprotease activity were significantly increased on day 42 post immunization. No significant change was observed in lysozyme activity. Challenge studies with live A. hydrophila on day 140 post-immunization of L. rohita significantly increased the relative percentage survival (∼44%) in the vaccinated group. The results suggest that the rOmpF could be used as a potential vaccine candidate to combat A. hydrophila infection in fish.
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Affiliation(s)
- Sunita Kumari Yadav
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Pujarini Dash
- Fish Health Management Division, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, 751002, India
| | - Pramoda Kumar Sahoo
- Fish Health Management Division, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, 751002, India
| | - Lalit C Garg
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Aparna Dixit
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India.
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14
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Abdelhamed H, Ibrahim I, Nho SW, Banes MM, Wills RW, Karsi A, Lawrence ML. Evaluation of three recombinant outer membrane proteins, OmpA1, Tdr, and TbpA, as potential vaccine antigens against virulent Aeromonas hydrophila infection in channel catfish (Ictalurus punctatus). FISH & SHELLFISH IMMUNOLOGY 2017; 66:480-486. [PMID: 28532667 DOI: 10.1016/j.fsi.2017.05.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Revised: 05/06/2017] [Accepted: 05/17/2017] [Indexed: 05/21/2023]
Abstract
A virulent clonal population of Aeromonas hydrophila (VAh) is recognized as the etiological agent in outbreaks of motile aeromonas septicemia (MAS) in catfish aquaculture in the southeastern United States since 2009. Genomic subtraction revealed three outer membrane proteins present in VAh strain ML09-119 but not in low virulence reference A. hydrophila strains: major outer membrane protein OmpA1, TonB-dependent receptor (Tdr), and transferrin-binding protein A (TbpA). Here, the genes encoding ompA1, tdr, and tbpA were cloned from A. hydrophila ML09-119 and expressed in Escherichia coli. The purified recombinant OmpA1, Tdr, and TbpA proteins had estimated molecular weights of 37.26, 78.55, and 41.67 kDa, respectively. Catfish fingerlings vaccinated with OmpA1, Tdr, and TbpA emulsified with non-mineral oil adjuvant were protected against subsequent VAh strain ML09-119 infection with 98.59%, 95.59%, and 47.89% relative percent survival (RPS), respectively. Furthermore, the mean liver, spleen, and anterior kidney bacterial concentrations were significantly lower in catfish vaccinated with the OmpA1 and Tdr than the sham-vaccinated control group. ELISA demonstrated that catfish immunized with OmpA1, Tdr, and TbpA produce significant antibody response by 21 days post-immunization. Therefore, OmpA1 and Tdr proteins could be used as potential candidates for vaccine development against virulent A. hydrophila infection. However, TbpA protein failed to provide strong protection.
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Affiliation(s)
- Hossam Abdelhamed
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA
| | - Iman Ibrahim
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA
| | - Seong Won Nho
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA
| | - Michelle M Banes
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA
| | - Robert W Wills
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, MS 39762, USA
| | - Attila Karsi
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA.
| | - Mark L Lawrence
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, MS 39762, USA.
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15
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Abdelhamed H, Nho SW, Turaga G, Banes MM, Karsi A, Lawrence ML. Protective efficacy of four recombinant fimbrial proteins of virulent Aeromonas hydrophila strain ML09-119 in channel catfish. Vet Microbiol 2016; 197:8-14. [DOI: 10.1016/j.vetmic.2016.10.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 10/22/2016] [Accepted: 10/28/2016] [Indexed: 11/26/2022]
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16
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Liu L, Gong YX, Liu GL, Zhu B, Wang GX. Protective immunity of grass carp immunized with DNA vaccine against Aeromonas hydrophila by using carbon nanotubes as a carrier molecule. FISH & SHELLFISH IMMUNOLOGY 2016; 55:516-522. [PMID: 27343373 DOI: 10.1016/j.fsi.2016.06.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 06/06/2023]
Abstract
To reduce the economic losses caused by diseases in aquaculture industry, more efficient and economic prophylactic measures should be urgently investigated. In this research, the effects of a novel functionalized single-walled carbon nanotubes (SWCNTs) applied as a delivery vehicle for DNA vaccine administration in juvenile grass carp against Aeromonas hydrophila were studied. Our results showed that SWCNTs loaded with DNA vaccine induced a better protection to juvenile grass carp against A. hydrophila. Moreover, SWCNTs conjugated with DNA vaccine provided significantly protective immunity compared with free DNA vaccine. Thereby, SWCNTs may be considered as a potential efficient DNA vaccine carrier to enhance the immunological activity.
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Affiliation(s)
- Lei Liu
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Yu-Xin Gong
- College of Veterinary Medicine, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Guang-Lu Liu
- College of Science, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Bin Zhu
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China
| | - Gao-Xue Wang
- College of Animal Science and Technology, Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
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17
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Yadav SK, Meena JK, Sharma M, Dixit A. Recombinant outer membrane protein C of Aeromonas hydrophila elicits mixed immune response and generates agglutinating antibodies. Immunol Res 2016; 64:1087-99. [DOI: 10.1007/s12026-016-8807-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Huang L, Qin Y, Yan Q, Lin G, Huang L, Huang B, Huang W. MinD plays an important role in Aeromonas hydrophila adherence to Anguilla japonica mucus. Gene 2015; 565:275-81. [DOI: 10.1016/j.gene.2015.04.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 03/31/2015] [Accepted: 04/08/2015] [Indexed: 11/29/2022]
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19
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Liu L, Gong YX, Zhu B, Liu GL, Wang GX, Ling F. Effect of a new recombinant Aeromonas hydrophila vaccine on the grass carp intestinal microbiota and correlations with immunological responses. FISH & SHELLFISH IMMUNOLOGY 2015; 45:175-83. [PMID: 25862971 DOI: 10.1016/j.fsi.2015.03.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 03/28/2015] [Accepted: 03/30/2015] [Indexed: 05/20/2023]
Abstract
Intestinal microbiota has become an integral component of the fish, and plays a key role in host metabolism, immunity and health maintenance. However, information on the immune responses after vaccine administration in relation to the intestinal microbiota is absent in fish. The present study focused on the effect of a new recombinant Aeromonas hydrophila vaccine (Aera) by using a novel functionalized, single-walled carbon nanotubes (SWCNTs) as a delivery vehicle on the intestinal microbiota of grass carp (Ctenopharyngodon idella) through the bath immunization, and further explored the immunological responses in intestine, kidney and spleen. By performing deep sequencing, a total of 81,979 valid reads and 609 OTUs obtained from 4 intestine samples were analyzed. We detected 141 genuses, most of which belonged to Firmicutes, Fusobacteria and Proteobacteria. Of note, the quantity of Aeromonas in library Aera (after 6 h Aera vaccine pretreatment, fish were transferred to tanks without SWCNTs-Aera for 28 d) and Aera-GD (6 h Aera vaccine pretreated prior to the group injected by A. hydrophila) was declined 6.5% and 14.6% compared with the control, respectively. Moreover, the expression of seven immune-related genes (IFN-I, TNF-α, CRP, IL-8, IgM, MHC I and CD8α) in the intestine, kidney and spleen of Aera treated fish was significantly enhanced, which indicated that a better tissue immune response in grass carp was induced by the SWCNTs-Aera vaccine. Therefore, a new recombinant SWCNT-Aera vaccine may represent potentially efficient and immunological role in grass carp intestine to resist A. hydrophila infection.
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Affiliation(s)
- Lei Liu
- Northwest A&F University, Yangling 712100, People's Republic of China
| | - Yu-Xin Gong
- Northwest A&F University, Yangling 712100, People's Republic of China
| | - Bin Zhu
- Northwest A&F University, Yangling 712100, People's Republic of China
| | - Guang-Lu Liu
- Northwest A&F University, Yangling 712100, People's Republic of China
| | - Gao-Xue Wang
- Northwest A&F University, Yangling 712100, People's Republic of China.
| | - Fei Ling
- Northwest A&F University, Yangling 712100, People's Republic of China.
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20
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Liu D, Liu X, Zhang L, Jiao H, Ju J, Zhao B. Biochemical characteristics of an alanine racemase from Aeromonas hydrophil HBNUAh01. Microbiology (Reading) 2015. [DOI: 10.1134/s0026261715020071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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21
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SongLin G, PanPan L, JianJun F, JinPing Z, Peng L, LiHua D. A novel recombinant bivalent outer membrane protein of Vibrio vulnificus and Aeromonas hydrophila as a vaccine antigen of American eel (Anguilla rostrata). FISH & SHELLFISH IMMUNOLOGY 2015; 43:477-484. [PMID: 25655329 DOI: 10.1016/j.fsi.2015.01.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 01/08/2015] [Accepted: 01/22/2015] [Indexed: 06/04/2023]
Abstract
The immogenicity of a novel vaccine antigen was evaluated after immunized American eels (Anguilla rostrata) with a recombinant bivalent expressed outer membrane protein (OMP) of Vibrio vulnificus and Aeromonas hydrophila. Three groups of eels were intraperitoneal (i.p) injected with phosphate-buffered saline (PBS group), formaline-killed-whole-cell (FKC) of A. hydrophila and V. vulnificus (FKC group) or the bivalent OMP (OMP group). On 14, 21, 28 and 42 days post-vaccination respectively, proliferation of the whole blood cells, titers of specific antibody and lysozyme activities of experimental eels were detected. On 28 day post-vaccination, eels from three groups were challenged by i.p injection of live A. hydrophila or V. vulnificus. The results showed that, compared with the PBS group, proliferation of whole blood cells in OMP group was significant enhanced on 28 days, and the serum titers of anti-A.hydrophila and anti-V. vulnificus antibody in eels of FKC and OMP group were significant increased on 14, 21 and 28d. Lysozyme Activities in serum, skin mucus, liver and kidney were significant changed between the three groups. Relative Percent Survival (RPS) after challenged A. hydrophila in KFC vs. PBS group and OMP vs. PBS group were 62.5% and 50% respectively, and the RPS challenged V. vulnificus in FKC and OMP vs. PBS group were 37.5% and 50% respectively. These results suggest that American eels immunized with the bivalent OMP would positively affect specific as well as non-specific immune parameters and protect against infection by the two pathogens in fresh water farming.
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Affiliation(s)
- Guo SongLin
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China.
| | - Lu PanPan
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China
| | - Feng JianJun
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China
| | - Zhao JinPing
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China
| | - Lin Peng
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China
| | - Duan LiHua
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC. Jimei University, Xiamen, Fujian 361021, China
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22
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Yadav SK, Marbaniang CN, Sharma V, Dixit A. Heterologous Soluble Expression of Recombinant OmpR of <i>Aeromonas hydrophila</i> and Its Immunogenic Potential. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/abb.2015.67044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Gong YX, Zhu B, Liu GL, Liu L, Ling F, Wang GX, Xu XG. Single-walled carbon nanotubes as delivery vehicles enhance the immunoprotective effects of a recombinant vaccine against Aeromonas hydrophila. FISH & SHELLFISH IMMUNOLOGY 2015; 42:213-220. [PMID: 25462556 DOI: 10.1016/j.fsi.2014.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/05/2014] [Accepted: 11/06/2014] [Indexed: 06/04/2023]
Abstract
To reduce the economic losses caused by diseases in aquaculture industry, more efficient and economic prophylactic measures should be urgently investigated. In this research, the effects of a novel functionalized single-walled carbon nanotubes (SWCNTs) applied as a delivery vehicle for recombinant Aeromonas hydrophila vaccine administration via bath or injection in juvenile grass carp were studied. The results showed that SWCNT as a vector for the recombinant protein aerA, augmented the production of specific antibodies, apparently stimulated the induction of immune-related genes, and induced higher level of survival rate compared with free aerA subunit vaccine. Furthermore, we compared the routes of bath and intramuscular injection immunization by SWCNTs-aerA vaccine, and found that similar antibody levels induced by SWCNTs-aerA were observed in both immunization routes. Meanwhile, a similar relative percentage survival (approximately 80%) was found in both a 40 mg/L bath immunization group, and a 20 μg injection group. The results indicate that functionalized SWCNTs could be a promising delivery vehicle to potentiate the immune response of recombinant vaccines, and might be used to vaccinate juvenile fish by bath administration method.
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Affiliation(s)
- Yu-Xin Gong
- Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Bin Zhu
- Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Guang-Lu Liu
- Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Lei Liu
- Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Fei Ling
- Northwest A&F University, Yangling, 712100, People's Republic of China
| | - Gao-Xue Wang
- Northwest A&F University, Yangling, 712100, People's Republic of China.
| | - Xin-Gang Xu
- Northwest A&F University, Yangling, 712100, People's Republic of China.
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24
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Yadav SK, Sahoo PK, Dixit A. Characterization of immune response elicited by the recombinant outer membrane protein OmpF of Aeromonas hydrophila, a potential vaccine candidate in murine model. Mol Biol Rep 2014; 41:1837-48. [DOI: 10.1007/s11033-014-3033-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 01/03/2014] [Indexed: 11/28/2022]
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25
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Zhang D, Pridgeon JW, Klesius PH. Vaccination of channel catfish with extracellular products of Aeromonas hydrophila provides protection against infection by the pathogen. FISH & SHELLFISH IMMUNOLOGY 2014; 36:270-275. [PMID: 24321514 DOI: 10.1016/j.fsi.2013.11.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 11/19/2013] [Accepted: 11/22/2013] [Indexed: 06/03/2023]
Abstract
Aeromonas hydrophila, a Gram-negative bacterium, is one of the economically-important pathogens in modern aquaculture. Among various traits, extracellular products (ECP) secreted by the bacterium are considered to be essential factors for virulence. Whether vaccination with the ECP could produce immune protection in catfish against the pathogen was determined in this study. The results showed that fish vaccinated with ECP had 100% of relative percent survival (RPS) when challenged with the pathogen two weeks post vaccination. The anti-ECP serum from vaccinated fish could aggregate cells of homogeneous bacteria as well as other virulent strains (isolates) of A. hydrophila but not an A. veronii isolate and a low virulent field isolate. The agglutination titers increased from two weeks to four weeks post immunization and sustained a high level at week seven when the RPS remained at 100%. The anti-ECP serum could also provide naïve fish with immediate protection against A. hydrophila as evidenced by passive immunization. Immunoblotting analysis showed that the anti-ECP serum contained antibodies that bound to specific targets, including protein and lipopolysaccharide-like molecules, in the ECP. Mass spectrometric analysis identified following putative proteins that may serve as important immunogens: chitinase, chitodextrinase, outer membrane protein85, putative metalloprotease, extracellular lipase, hemolysin and elastase. Findings revealed in this study suggest that, while ECP prepared in a conventional and convenient way could be a vaccine candidate, further characterization of antibody-mediated targets in the ECP would uncover quintessential antigens for the future development of highly efficacious vaccines.
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Affiliation(s)
- Dunhua Zhang
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA.
| | - Julia W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA
| | - Phillip H Klesius
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA
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26
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Abstract
Aeromonas species are inhabitants of aquatic environments and are able to cause disease in humans and fish among other animals. In aquaculture, they are responsible for the economically important diseases of furunculosis and motile Aeromonas septicaemia (MAS). Whereas gastroenteritis and wound infections are the major human diseases associated with the genus. As they inhabit and survive in diverse environments, aeromonads possess a wide range of colonisation factors. The motile species are able to swim in liquid environments through the action of a single polar flagellum, the flagellin subunits of which are glycosylated; although essential for function the biological role of glycan addition is yet to be determined. Approximately 60% of aeromonads possess a second lateral flagella system that is expressed in viscous environments for swarming over surfaces; both flagellar systems have been shown to be important in the initial colonisation of surfaces. Subsequently, other non-flagellar colonisation factors are employed; these can be both filamentous and non-filamentous. The aeromonads possess a number of fimbrial systems with the bundle-forming MSHA type IV pilus system, having a major role in human cell adherence. Furthermore, a series of outer-membrane proteins have also been implicated in the aeromonad adhesion process. A number of strains are also capable of cell invasion and that maybe linked with the more invasive diseases of bacteraemia or wound infections. These strains employ cell surface factors that allow the colonisation of these niches that protect them from the host's immune system such as S-layers, capsules or particular lipopolysaccharides.
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Affiliation(s)
- Rebecca Lowry
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom
| | - Sabela Balboa
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom; Departamento de Microbiología y Parasitología, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Jennifer L Parker
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom
| | - Jonathan G Shaw
- Department of Infection and Immunity, University of Sheffield, Sheffield, United Kingdom.
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Gao S, Zhao N, Amer S, Qian M, Lv M, Zhao Y, Su X, Cao J, He H, Zhao B. Protective efficacy of PLGA microspheres loaded with divalent DNA vaccine encoding the ompA gene of Aeromonas veronii and the hly gene of Aeromonas hydrophila in mice. Vaccine 2013; 31:5754-9. [DOI: 10.1016/j.vaccine.2013.08.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 08/15/2013] [Accepted: 08/21/2013] [Indexed: 12/18/2022]
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Pridgeon JW, Klesius PH. G-protein coupled receptor 18 (GPR18) in channel catfish: expression analysis and efficacy as immunostimulant against Aeromonas hydrophila infection. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1070-1078. [PMID: 23891864 DOI: 10.1016/j.fsi.2013.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 07/09/2013] [Accepted: 07/09/2013] [Indexed: 06/02/2023]
Abstract
The objectives of this study were: 1) to determine the transcriptional profiles of G-protein coupled receptor 18 (GPR18) in channel catfish after infection with Aeromonas hydrophila compared to that in healthy catfish; 2) to determine whether over-expression of GPR18 in catfish gill cells will offer protection against infection of A. hydrophila; 3) to determine whether recombinant pcDNA-GPR18 could be used as an immunostimulant to protect channel catfish against A. hydrophila infection. Quantitative PCR revealed that the transcription levels of GPR18 in all tissues of infected catfish were significantly (P < 0.05) induced except in the intestine. When pcDNA3.2-vectored recombinant GPR18 was transfected in catfish gill cells G1B, the over-expression of pcDNA-GPR18 offered significant (P < 0.05) protection to G1B cells against A. hydrophila infection. When channel catfish were intraperitoneally injected with QCDCR adjuvant formulated pcDNA-GPR18 and challenged with a highly virulent A. hydrophila strain at 1-, 2-, 14-, and 28-days post treatment, pcDNA-GPR18 offered 50%, 100%, 57%, and 55% protection to channel catfish, respectively. Macrophages of fish treated with pcDNA-GPR18 produced significantly (P < 0.05) higher amounts of reactive oxygen species and nitric oxide than that of fish treated with pcDNA vector alone. In addition, serum lysozyme activity of catfish injected with pcDNA-GPR18 was significantly (P < 0.08) increased. Taken together, our results suggest that pcDNA-GPR18 could be used as a novel immunostimulant to provide immediate protection to channel catfish against A. hydrophila infection.
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Affiliation(s)
- Julia W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA.
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Pridgeon JW, Klesius PH. Apolipoprotein A1 in channel catfish: transcriptional analysis, antimicrobial activity, and efficacy as plasmid DNA immunostimulant against Aeromonas hydrophila infection. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1129-1137. [PMID: 23954697 DOI: 10.1016/j.fsi.2013.07.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 07/11/2013] [Accepted: 07/14/2013] [Indexed: 06/02/2023]
Abstract
The objectives of this study were to: 1) determine transcriptional profiles of apolipoprotein A1 (ApoA1) in collected channel catfish tissues after infection with Aeromonas hydrophila by bath immersion; 2) investigate whether recombinant channel catfish apolipoprotein A1 produced in Escherichia coli expression system possesses any antimicrobial activity against A. hydrophila; 3) evaulate whether recombinant channel catfish apolipoprotein A1 plasmid DNA could be used as immunostimulant to protect fish against A. hydrophila infection. Quantitative PCR revealed that the transcription levels of ApoA1 in infected catfish were significantly (P < 0.05) more induced in the anterior kidney. Recombinant apoA1 produced in E. coli expression system exhibited lytic activity against Gram-positive Micrococcus lysodeikticus and Gram-negative A. hydrophila. When pcDNA3.2-vectored recombinant apoA1 was transfected in channel catfish gill cells G1B, the over-expression of pcDNA-ApoA1 offered significant (P < 0.05) protection to G1B cells against A. hydrophila infection. When channel catfish were intraperitoneally injected with QCDCR adjuvant formulated pcDNA-ApoA1 and challenged with a highly virulent A. hydrophila strain AL-09-71 at two days post injection, pcDNA-ApoA1 injection offered 100% protection to channel catfish. Macrophages of fish injected with pcDNA-ApoA1 produced significantly (P < 0.05) higher amounts of reactive oxygen species and nitric oxide than that of fish injected with pcDNA vector alone. Our results suggest that pcDNA-ApoA1 could be used as a novel immunostimulant to offer immediate protection to catfish against A. hydrophila infection.
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Affiliation(s)
- Julia W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA.
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30
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Pridgeon JW, Klesius PH, Dominowski PJ, Yancey RJ, Kievit MS. Recombinant goose-type lysozyme in channel catfish: lysozyme activity and efficacy as plasmid DNA immunostimulant against Aeromonas hydrophila infection. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1309-1319. [PMID: 23978564 DOI: 10.1016/j.fsi.2013.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 08/09/2013] [Accepted: 08/14/2013] [Indexed: 06/02/2023]
Abstract
The objectives of this study were: 1) to investigate whether recombinant channel catfish lysozyme-g (CC-Lys-g) produced in Escherichia coli expression system possesses any lysozyme activity; and 2) to evaluate whether channel catfish lysozyme-g plasmid DNA could be used as an immunostimulant to protect channel catfish against Aeromonas hydrophila infection. Recombinant CC-Lys-g produced in E. coli expression system exhibited significant (P < 0.05) lytic activity against Gram-positive Micrococcus lysodeikticus and Gram-negative A. hydrophila. When pcDNA3.2-vectored recombinant channel catfish lysozyme-g (pcDNA-Lys-g) was transfected in channel catfish gill cells G1B, the over-expression of pcDNA-Lys-g offered significant (P < 0.05) protection to G1B cells against A. hydrophila infection. When channel catfish were intraperitoneally injected with pcDNA-Lys-g along with an adjuvant QCDCR, the transcriptional level of Lys-g was significantly (P < 0.05) increased. When pcDNA-Lys-g injected fish was challenged with a highly virulent A. hydrophila strain AL-09-71, pcDNA-Lys-g offered 100% protection to channel catfish at two days post DNA injection. Macrophages of fish injected with pcDNA-Lys-g produced significantly (P < 0.05) higher amounts of reactive oxygen species and nitric oxide than that of fish injected with pcDNA vector alone at two days post DNA injection. Taken together, our results suggest that pcDNA-Lys-g could be used as a novel immunostimulant to offer immediate protection to channel catfish against A. hydrophila infection.
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Affiliation(s)
- Julia W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA.
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31
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Zhang DL, Guan RZ, Huang WS, Xiong J. Isolation and characterization of a novel antibacterial peptide derived from hemoglobin alpha in the liver of Japanese eel, Anguilla japonica. FISH & SHELLFISH IMMUNOLOGY 2013; 35:625-631. [PMID: 22951230 DOI: 10.1016/j.fsi.2012.08.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 08/09/2012] [Accepted: 08/17/2012] [Indexed: 06/01/2023]
Abstract
We isolated and characterized a novel antibacterial peptide, AJHbα, derived from hemoglobin alpha in the liver of Japanese eel, Anguilla japonica. It with concentration of 11.30 μM exhibited stronger antibacterial activity against pathogenic bacterium 1 × 10(6) cell ml(-1)Edwardsiella tarda than other two bacteria. The extraction procedure for AJHbα included extraction with acetate acid, ultrafiltration, cation-exchange chromatography on HiTrap™ CM FF, reverse-phase liquid chromatography on Source 5R RPC and C18 RP-HPLC. MALDI-TOF MS suggested that the peptide had an observed molecular weight of 2388.05 Da. Its amino acid sequence determined by Edman degradation was similar to those of hemoglobin alpha chain in other fish by BLAST analysis. A complete N-terminal amino acid sequence of the AJHbα was FAHWPDLGPGSPSVKKHGKVIM corresponding to the cDNA sequence by RACE amplification. Its synthetic peptide had strong antibacterial activities against ten Gram-positive or negative bacteria. To our knowledge, AJHbα was the first identified fragment of hemoglobin alpha chain with strong antibacterial activity in fish.
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Affiliation(s)
- Dong Ling Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei Province, China
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Pridgeon JW, Klesius PH, Dominowski PJ, Yancey RJ, Kievit MS. Chicken-type lysozyme in channel catfish: expression analysis, lysozyme activity, and efficacy as immunostimulant against Aeromonas hydrophila infection. FISH & SHELLFISH IMMUNOLOGY 2013; 35:680-688. [PMID: 23732847 DOI: 10.1016/j.fsi.2013.05.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/23/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023]
Abstract
To understand whether chicken-type lysozyme (Lys-c) in channel catfish was induced by infection of Aeromonas hydrophila, the transcriptional levels of Lys-c in skin, gut, liver, spleen, posterior kidney, and blood cells in healthy channel catfish was compared to that in channel catfish infected with A. hydrophila by bath immersion. Quantitative PCR revealed that the transcription levels of Lys-c in infected catfish were significantly (P < 0.05) induced in all five tissues tested as well as in blood cells. Recombinant CC-Lys-c produced in Escherichia coli expression system (R-CC-Lys-c) exhibited significant (P < 0.05) lytic activity to Gram-positive Micrococcus lysodeikticus and Gram-negative A. hydrophila. When pcDNA3.2-vectored recombinant channel catfish lysozyme-c (pcDNA-Lys-c) was transfected in channel catfish gill cells G1B, the over-expression of pcDNA-Lys-c offered significant (P < 0.05) protection to G1B against A. hydrophila infection. When channel catfish were intraperitoneally injected with QCDCR adjuvant formulated pcDNA-Lys-c and challenged with a highly virulent A. hydrophila strain AL-09-71 at 1-, 2-, 14-, and 28-days post treatment, pcDNA-Lys-c offered 75%, 100%, 60%, and 77% protection to channel catfish, respectively. Macrophages of fish treated with pcDNA-Lys-c produced significantly (P < 0.05) higher amounts of reactive oxygen species and nitric oxide than that of fish treated with pcDNA vector alone. Taken together, our results suggest that pcDNA-Lys-c could be used as a novel immunostimulant to protect channel catfish against A. hydrophila infection.
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Affiliation(s)
- Julia W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, 990 Wire Road, Auburn, AL 36832, USA.
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Guo SL, Wang Y, Guan RZ, Feng JJ, Yang QH, Lu PP, Hu LL, Zhao JP. Immune effects of a bivalent expressed outer membrane protein to American eels (Anguilla rostrota). FISH & SHELLFISH IMMUNOLOGY 2013; 35:213-20. [PMID: 23643876 DOI: 10.1016/j.fsi.2013.04.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 03/25/2013] [Accepted: 04/15/2013] [Indexed: 05/26/2023]
Abstract
The specific and non-specific immune parameters and protection of American eels (Anguilla rostrata) were evaluated after immunized eels with a bivalent expressed out membrane protein (OMP) of porin Ⅱ of Aeromonas hydrophila and ompS2 of Edwardsiella tarda. One hundred eighty eels were distributed into 3 equal groups and intraperitoneal (i.p) injection with phosphate-buffered saline (PBS group), formalin-killed-whole-cell (FKC) of A. hydrophila and E. tarda (FKC group) or the bivalent OMP (OMP group). The lymphocytes and red blood cells collected on 14, 21 and 42 days post-vaccination were used to evaluate the stimulation index (SI) and the sera collected on 14, 21, 28 and 42 days were used to assize the titers of specific antibody as well as lysozyme activity. Lysozyme activities in skin mucus, suspension of liver and kidney were also recorded on 14, 21 and 28 days. On 28 d post-vaccination, eels from all three groups were challenged by i.p injection of live A. hydrophila or E. tarda. The results show that, compared with the PBS group, proliferation of lymphocytes in OMP group was significantly (P < 0.05) enhanced on 21 days, and the serum titers of anti-A. hydrophila and anti- E. tarda antibody in eels of FKC and OMP group were significant increased (P < 0.05 or P < 0.01) on 14, 21 and 28 days. Activity of the lysozyme in serum, skin mucus, liver and kidney were significant changed (P < 0.05 or P < 0.01) between the three groups. Relative Percent Survival (RPS) after challenged with A. hydrophila on 28 days post immunization in two vaccinated groups vs. PBS group were 50%, and the RPS challenge E. tarda in FKC and OMP vs. PBS group were 50% and 37.5% respectively. These results suggest that American eels immunized with the bivalent OMP would positively affect specific as well as non-specific immune parameters and protect against infection by the two pathogens in freshwater farming.
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Affiliation(s)
- Song-Lin Guo
- Fishery College of Jimei University/Engineering Research Center of Modern Eel Industrial Technology of the Ministry of Education, PRC, Jimei University, Yindou Road, Fujian, Xiamen 361021, China.
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Pridgeon JW, Klesius PH, Yildirim-Aksoy M. Attempt to develop live attenuated bacterial vaccines by selecting resistance to gossypol, proflavine hemisulfate, novobiocin, or ciprofloxacin. Vaccine 2013; 31:2222-30. [DOI: 10.1016/j.vaccine.2013.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 02/21/2013] [Accepted: 03/04/2013] [Indexed: 12/01/2022]
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Wang N, Yang Z, Zang M, Liu Y, Lu C. Identification of Omp38 by immunoproteomic analysis and evaluation as a potential vaccine antigen against Aeromonas hydrophila in Chinese breams. FISH & SHELLFISH IMMUNOLOGY 2013; 34:74-81. [PMID: 23063539 DOI: 10.1016/j.fsi.2012.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/21/2012] [Accepted: 10/01/2012] [Indexed: 06/01/2023]
Abstract
Aeromonas hydrophila is a fish pathogen causing systemic infections in aquatic environments, and determining its antigenic proteins is important for vaccine development to reduce economic losses in aquaculture worldwide. Here, an immunoproteomic approach was used to identify immunogenic outer membrane proteins (OMPs) of the Chinese vaccine strain J-1 using convalescent sera from Chinese breams. Seven unique immunogenic proteins were identified by two-dimensional (2-D) electrophoresis and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-TOF-MS). One protein of interest, Omp38, was expressed, and its immunogenicity and protective efficacy were evaluated in Chinese breams. The two groups of fish immunized with the inactivated vaccine and recombinant Omp38 protein showed significant serum IgM antibody levels after vaccination, compared with the fish injected with PBS buffer. In addition, the superoxide dismutase (SOD) activity, lysozyme (LSZ) activity and phagocytosis activity of head kidney lymphocytes of immunized groups were significantly higher than those of the control. The fish receiving inactivated vaccine and recombinant Omp38 protein developed a protective response to a live A. hydrophila challenge 45 days post-immunization, as demonstrated by increased survival of vaccinated fish over the control and by decreased histological alterations in vaccinated fish. Furthermore, protective effect was better in Omp38 group than in the inactivated vaccine group. These results suggest that the recombinant Omp38 protein could effectively stimulate both specific and non-specific immune responses and protect against A. hydrophila infection. Therefore, Omp38 may be developed as a potential vaccine candidate against A. hydrophila infection.
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Affiliation(s)
- Na Wang
- Key Laboratory of Animal Bacteriology, Ministry of Agriculture, Nanjing Agricultural University, No. 1 Weigang, Nanjing 210095, China
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Pridgeon JW, Yildirim-Aksoy M, Klesius PH, Srivastava KK, Reddy PG. Attenuation of a virulent Aeromonas hydrophila with novobiocin and pathogenic characterization of the novobiocin-resistant strain. J Appl Microbiol 2012; 113:1319-28. [PMID: 22897434 DOI: 10.1111/j.1365-2672.2012.05430.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 07/24/2012] [Accepted: 07/25/2012] [Indexed: 12/20/2022]
Abstract
AIM To determine whether novobiocin resistance strategy could be used to attenuate a virulent Aeromonas hydrophila AH11P strain and to characterize the growth and pathogenic differences between the novobiocin-resistant strain and its virulent parent strain AH11P. METHODS AND RESULTS A novobiocin-resistant strain AH11NOVO was obtained from a virulent Aer. hydrophila strain AH11P through selection of resistance to novobiocin. AH11NOVO was found to be avirulent to channel catfish (Ictalurus punctatus), whereas AH11P was virulent. When AH11NOVO vaccinated channel catfish were challenged with AH11P at 14 days postvaccination, relative per cent of survival of vaccinated fish was 100%. The cell proliferation rate of AH11NOVO was found to be significantly (P < 0.05) less than that of AH11P. In vitro motility assay revealed that AH11NOVO was nonmotile, whereas AH11P was motile. AH11NOVO had significantly (P < 0.05) lower in vitro chemotactic response to catfish mucus than that of AH11P. Although the ability of AH11NOVO to attach catfish gill cells was similar to that of AH11P, the ability of AH11NOVO to invade catfish gill cells was significantly (P < 0.05) lower than that of AH11P. CONCLUSIONS The novobiocin-resistant AH11NOVO is attenuated and different from its parent AH11P in pathogenicity. SIGNIFICANCE AND IMPACT OF THE STUDY The significantly lower chemotactic response and invasion ability of AH11NOVO compared with that of its virulent parent strain AH11P might shed light on the pathogenesis of Aer. hydrophila.
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Affiliation(s)
- J W Pridgeon
- Aquatic Animal Health Research Unit, USDA-ARS, Auburn, AL 36832, USA.
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Maiti B, Shetty M, Shekar M, Karunasagar I, Karunasagar I. Evaluation of two outer membrane proteins, Aha1 and OmpW of Aeromonas hydrophila as vaccine candidate for common carp. Vet Immunol Immunopathol 2012; 149:298-301. [PMID: 22917476 DOI: 10.1016/j.vetimm.2012.07.013] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 07/07/2012] [Accepted: 07/30/2012] [Indexed: 11/30/2022]
Abstract
Aeromonas hydrophila is an important fish pathogen responsible for huge economic losses in aquaculture sector. The bacterial outer membrane proteins (OMPs), especially adhesins play a key role in the virulence of the bacteria and are considered potential vaccine candidates. We evaluated the immunogenicity of two important outer membrane proteins namely Aha1 and OmpW of A. hydrophila. These proteins were over-expressed in Escherichia coli, purified and used for the vaccination of common carp. Sequence analysis predicted that, Aha1 and OmpW are adhesins and antigenic. Common carp immunized with recombinant Aha1 and OmpW proteins showed significant antibody production and a relative percentage survival of 52 and 71 respectively indicating their protective efficacy against A. hydrophila infection.
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Affiliation(s)
- Biswajit Maiti
- UNESCO-MIRCEN for Marine Biotechnology, Department of Fishery Microbiology, Karnataka Veterinary, Animal & Fisheries Sciences University, College of Fisheries, Mangalore 575002, India
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Khushiramani RM, Maiti B, Shekar M, Girisha SK, Akash N, Deepanjali A, Karunasagar I, Karunasagar I. Recombinant Aeromonas hydrophila outer membrane protein 48 (Omp48) induces a protective immune response against Aeromonas hydrophila and Edwardsiella tarda. Res Microbiol 2012; 163:286-91. [DOI: 10.1016/j.resmic.2012.03.001] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 03/05/2012] [Indexed: 11/30/2022]
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Pridgeon JW, Klesius PH. Development and efficacy of novobiocin and rifampicin-resistant Aeromonas hydrophila as novel vaccines in channel catfish and Nile tilapia. Vaccine 2011; 29:7896-904. [DOI: 10.1016/j.vaccine.2011.08.082] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 08/11/2011] [Accepted: 08/15/2011] [Indexed: 12/26/2022]
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