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Zhou Q, Hu Y, You Y, Gao Y, Wang X, Qin L. Functional analysis of OmpA and its contribution to pathogenesis of Edwardsiella tarda. Microb Pathog 2024; 193:106760. [PMID: 38914348 DOI: 10.1016/j.micpath.2024.106760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 03/27/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024]
Abstract
Outer membrane protein A (OmpA), a major component of outer membrane proteins in gram-negative bacteria, is considered to be an important virulence factor in various pathogenic bacteria, but its underlying mechanisms involved in pathogenic process of Edwardsiella tarda has not yet been fully elucidated. E. tarda is an important facultative intracellular pathogen with a broad host range. This bacterium could survive and replicate in macrophages as an escape mechanism from the host defense. To address the functions of OmpA and its potential roles in the pathogenesis of E. tarda, ΔompA mutant strain and ΔompA-C complementary strain were constructed by the allelic exchange method in this study. Here, we demonstrate that the abilities of motility, biofilm formation and adherence to RAW264.7 cells of ΔompA were significantly impaired, although there was no difference in growth between wild-type (WT) strain and ΔompA. Moreover, inactivation of ompA rendered E. tarda more sensitive to oxidative, heat shock and osmotic stress, which simulate the in vivo conditions that E. tarda encounters within the intramacrophage environment. Consist with this observation, ΔompA was also found to be markedly attenuated for growth within macrophages. In addition, compared with the WT strain, ΔompA activated macrophages to release more inflammatory mediators, including tumor necrosis factor alpha (TNF-α), reactive oxygen species (ROS) and nitric oxide (NO). However, flow cytometry analysis revealed that ΔompA induced less apoptosis of RAW264.7 cells as compared with WT strain, characterized by decreased Annexin V binding and the activation of caspase-3. Overall, our findings suggest an importance of OmpA to E. tarda and provide the first comprehensive insight into its functions and potential roles in the pathogenesis of E. tarda, including its effect on interaction with macrophages.
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Affiliation(s)
- Quan Zhou
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Yushuai Hu
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Yicheng You
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Yingli Gao
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Xingqiang Wang
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China
| | - Lei Qin
- School of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang, China.
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2
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Pumchan A, Proespraiwong P, Sawatdichaikul O, Phurahong T, Hirono I, Unajak S. Computational design of novel chimeric multiepitope vaccine against bacterial and viral disease in tilapia (Oreochromis sp.). Sci Rep 2024; 14:14048. [PMID: 38890454 PMCID: PMC11189486 DOI: 10.1038/s41598-024-64383-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 06/07/2024] [Indexed: 06/20/2024] Open
Abstract
Regarding several infectious diseases in fish, multiple vaccinations are not favorable. The chimeric multiepitope vaccine (CMEV) harboring several antigens for multi-disease prevention would enhance vaccine efficiency in terms of multiple disease prevention. Herein, the immunogens of tilapia's seven pathogens including E. tarda, F. columnare, F. noatunensis, S. iniae, S. agalactiae, A. hydrophila, and TiLV were used for CMEV design. After shuffling and annotating the B-cell epitopes, 5,040 CMEV primary protein structures were obtained. Secondary and tertiary protein structures were predicted by AlphaFold2 creating 25,200 CMEV. Proper amino acid alignment in the secondary structures was achieved by the Ramachandran plot. In silico determination of physiochemical and other properties including allergenicity, antigenicity, glycosylation, and conformational B-cell epitopes were determined. The selected CMEV (OSLM0467, OSLM2629, and OSLM4294) showed a predicted molecular weight (MW) of 70 kDa, with feasible sites of N- and O-glycosylation, and a number of potentially conformational B-cell epitope residues. Molecular docking, codon optimization, and in-silico cloning were tested to evaluate the possibility of protein expression. Those CMEVs will further elucidate in vitro and in vivo to evaluate the efficacy and specific immune response. This research will highlight the new era of vaccines designed based on in silico structural vaccine design.
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Affiliation(s)
- Ansaya Pumchan
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
| | - Porranee Proespraiwong
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
| | - Orathai Sawatdichaikul
- Department of Nutrition and Health, Institute of Food Research and Product Development, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
| | - Thararat Phurahong
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand
| | - Ikuo Hirono
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-KU, Tokyo, 108-8477, Japan
| | - Sasimanas Unajak
- Department of Biochemistry, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand.
- Kasetsart Vaccines and Bio-Product Innovation Centre, Kasetsart University, 50 Ngam Wong Wan, Chatuchak, 10900, Bangkok, Thailand.
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Nayak S, Akshay SD, Deekshit VK, Raj JM, Maiti B. Exposure to imipenem at sub-minimum inhibitory concentration leads to altered expression of major outer membrane proteins in Acinetobacter baumannii. J Appl Microbiol 2024; 135:lxae105. [PMID: 38653725 DOI: 10.1093/jambio/lxae105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 04/15/2024] [Accepted: 04/22/2024] [Indexed: 04/25/2024]
Abstract
AIMS Acinetobacter baumannii is a nosocomial pathogen known to be multidrug-resistant (MDR), especially to drugs of the carbapenem class. Several factors contribute to resistance, including efflux pumps, β-lactamases, alteration of target sites, and permeability defects. In addition, outer membrane proteins (OMPs), like porins are involved in the passage of antibiotics, and their alteration could lead to resistance development. This study aimed to explore the possible involvement of porins and OMPs in developing carbapenem resistance due to differential expression. METHODS AND RESULTS The antibiotic-susceptible and MDR isolates of A. baumannii were first studied for differences in their transcriptional levels of OMP expression and OMP profiles. The antibiotic-susceptible isolates were further treated with imipenem, and it was found that the omp genes were differentially expressed. Six of the nine genes studied were upregulated at 1 h of exposure to imipenem. Their expression gradually decreased with time, further confirmed by their OMP profile and two-dimensional gel electrophoresis. CONCLUSIONS This study could identify OMPs that were differentially expressed on exposure to imipenem. Hence, this study provides insights into the role of specific OMPs in antibiotic resistance in A. baumannii.
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Affiliation(s)
- Srajana Nayak
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Bio & Nano Technology, Deralakatte, Mangaluru 575018, India
| | - Sadanand Dangari Akshay
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Bio & Nano Technology, Deralakatte, Mangaluru 575018, India
| | - Vijaya Kumar Deekshit
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Infectious Diseases & Microbial Genomics, Deralakatte, Mangaluru 575018, India
| | - Juliet Mohan Raj
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Infectious Diseases & Microbial Genomics, Deralakatte, Mangaluru 575018, India
| | - Biswajit Maiti
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Bio & Nano Technology, Deralakatte, Mangaluru 575018, India
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Mertes V, Saragliadis A, Mascherin E, Tysvær EB, Roos N, Linke D, Winther-Larsen HC. Recombinant expression of Yersinia ruckeri outer membrane proteins in Escherichia coli extracellular vesicles. Protein Expr Purif 2024; 215:106409. [PMID: 38040272 DOI: 10.1016/j.pep.2023.106409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/11/2023] [Accepted: 11/25/2023] [Indexed: 12/03/2023]
Abstract
The secretion of extracellular vesicles (EVs) is a common process in Gram-negative bacteria and can be exploited for biotechnological applications. EVs pose a self-adjuvanting, non-replicative vaccine platform, where membrane and antigens are presented to the host immune system in a non-infectious fashion. The secreted quantity of EVs varies between Gram-negative bacterial species and is comparatively high in the model bacterium E. coli. The outer membrane proteins OmpA and OmpF of the fish pathogen Y. ruckeri have been proposed as vaccine candidates to prevent enteric redmouth disease in aquaculture. In this work, Y.ruckeri OmpA or OmpF were expressed in E. coli and recombinant EVs were isolated. To avoid competition between endogenous E. coli OmpA or OmpF, Y. ruckeri OmpA and OmpF were expressed in E. coli strains lacking ompA, ompF, and in a quadruple knockout strain where the four major outer membrane protein genes ompA, ompC, ompF and lamB were removed. Y.ruckeri OmpA and OmpF were successfully expressed in EVs derived from the E. coli mutants as verified by SDS-PAGE, heat modifiability and proteomic analysis using mass-spectrometry. Transmission electron microscopy revealed the presence of EVs in all E. coli strains, and increased EV concentrations were detected when expressing Y. ruckeri OmpA or OmpF in recombinant EVs compared to empty vector controls as verified by nanoparticle tracking analysis. These results show that E. coli can be utilized as a vector for production of EVs expressing outer membrane antigens from Y. ruckeri.
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Affiliation(s)
- Verena Mertes
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Norway
| | - Athanasios Saragliadis
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Norway
| | - Elisa Mascherin
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Italy
| | - Ellen-Beate Tysvær
- Section for Physiology and Cell Biology, Department of Biosciences, University of Oslo, Norway
| | - Norbert Roos
- Section for Physiology and Cell Biology, Department of Biosciences, University of Oslo, Norway
| | - Dirk Linke
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Norway
| | - Hanne C Winther-Larsen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Norway.
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Akshay SD, Deekshit VK, Mohan Raj J, Maiti B. Outer Membrane Proteins and Efflux Pumps Mediated Multi-Drug Resistance in Salmonella: Rising Threat to Antimicrobial Therapy. ACS Infect Dis 2023; 9:2072-2092. [PMID: 37910638 DOI: 10.1021/acsinfecdis.3c00408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Despite colossal achievements in antibiotic therapy in recent decades, drug-resistant pathogens have remained a leading cause of death and economic loss globally. One such WHO-critical group pathogen is Salmonella. The extensive and inappropriate treatments for Salmonella infections have led from multi-drug resistance (MDR) to extensive drug resistance (XDR). The synergy between efflux-mediated systems and outer membrane proteins (OMPs) may favor MDR in Salmonella. Differential expression of the efflux system and OMPs (influx) and positional mutations are the factors that can be correlated to the development of drug resistance. Insights into the mechanism of influx and efflux of antibiotics can aid in developing a structurally stable molecule that can be proficient at escaping from the resistance loops in Salmonella. Understanding the strategic responsibilities and developing policies to address the surge of drug resistance at the national, regional, and global levels are the needs of the hour. In this Review, we attempt to aggregate all the available research findings and delineate the resistance mechanisms by dissecting the involvement of OMPs and efflux systems. Integrating major OMPs and the efflux system's differential expression and positional mutation in Salmonella may provide insight into developing strategic therapies for one health application.
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Affiliation(s)
- Sadanand Dangari Akshay
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Bio & Nano Technology, Paneer Campus, Deralakatte, Mangalore-575018, India
| | - Vijaya Kumar Deekshit
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Infectious Diseases & Microbial Genomics, Paneer Campus, Deralakatte, Mangalore-575018, India
| | - Juliet Mohan Raj
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Infectious Diseases & Microbial Genomics, Paneer Campus, Deralakatte, Mangalore-575018, India
| | - Biswajit Maiti
- Nitte (Deemed to be University), Nitte University Centre for Science Education and Research, Department of Bio & Nano Technology, Paneer Campus, Deralakatte, Mangalore-575018, India
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Nayak S, Aanice D, Andria D, Pai A, Maiti B. Polymerase chain reaction-based typing methods and protein profiling analysis of Acinetobacter baumannii isolated from environmental and clinical sources from South India. Can J Microbiol 2023; 69:449-462. [PMID: 37364377 DOI: 10.1139/cjm-2023-0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Acinetobacter baumannii is an opportunistic pathogen known for causing hospital-acquired infections. The natural habitat includes soil, water, sewage, and drains, but it is also detected in infected individuals' blood, pus, and respiratory pathways. Due to its resilient nature, it is known to be a causative agent for outbreaks. Therefore, it is crucial to understand the genetic similarity between clinical and environmental isolates. The study aimed to find the genetic relationships between clinical and environmental isolates using PCR-based typing methods such as enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR), random amplified polymorphic DNA (RAPD), and repetitive extragenic palindromic sequence-based PCR (Rep-PCR). Additionally, outer membrane protein (OMP) and whole cell protein (WCP) profiles were also used. The PCR-based methods, ERIC-PCR and Rep-PCR, showed decreased genetic similarity between clinical and environmental isolates (66% and 58%, respectively). However, RAPD showed relatively higher genetic similarity (91%). The OMP and WCP profiles showed varied banding patterns between the clinical and environmental isolates in the 29-43 kDa region. The PCR-based methods proved to be a reliable and reproducible technique. The OMP and WCP profiles, though not as discriminatory as the molecular typing methods, could help identify the most and least commonly occurring protein bands and thus help in typing clinical and environmental A. baumannii isolates.
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Affiliation(s)
- Srajana Nayak
- Nitte (Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangaluru, Karnataka 575018, India
| | - D'Almeida Aanice
- Nitte (Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangaluru, Karnataka 575018, India
| | - Dsouza Andria
- Nitte (Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangaluru, Karnataka 575018, India
| | - Archana Pai
- Nitte (Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangaluru, Karnataka 575018, India
| | - Biswajit Maiti
- Nitte (Deemed to be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Deralakatte, Mangaluru, Karnataka 575018, India
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Basawa R, Kabra S, Khile DA, Faruk Abbu RU, Parekkadan SJ, Thomas NA, Kim SK, Raval R. Repurposing chitin-rich seafood waste for warm-water fish farming. Heliyon 2023; 9:e18197. [PMID: 37519647 PMCID: PMC10372652 DOI: 10.1016/j.heliyon.2023.e18197] [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] [Received: 01/29/2023] [Revised: 07/03/2023] [Accepted: 07/11/2023] [Indexed: 08/01/2023] Open
Abstract
The pisciculture industry has grown multi-fold over the past few decades. However, a surge in development and nutrient demand has led to the establishment of numerous challenges. Being a potential solution, chitosan has gained attention as a bio nanocomposite for its well-acclaimed properties including biodegradability, non-toxicity, immunomodulatory effects, antimicrobial activity, and biocompatibility. This biopolymer and its derivatives can be transformed into various structures, like micro and nanoparticles, for various purposes. Consequently, with regards to these properties chitin and its derivatives extend their application into drug delivery, food supplementation, vaccination, and preservation. This review focuses on the clinical advancements made in fish biotechnology via chitosan and its derivatives and highlights its prospective expansion into the pisciculture industry-in particular, warm-water species.
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Affiliation(s)
- Renuka Basawa
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Suhani Kabra
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Dnyanada Anil Khile
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Rahil Ummar Faruk Abbu
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Serin Joby Parekkadan
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Naomi Ann Thomas
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
| | - Se Kwon Kim
- Department of Marine Science and Convergence Engineering, College of Science and Technology, Hanyang University, Erica 55 Hanyangdae-ro, Sangnol-gu, Ansan-si 11558, Gyeonggi-do, Republic of Korea
| | - Ritu Raval
- Department of Biotechnology, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
- Manipal Biomachines, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India
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Yang Q, Yang BT, Kang YH, Cong W. Efficacy of a recombinant Lactobacillus plantarum Lp-pPG-Malt as an oral vaccine candidate against Aeromonas hydrophila infection in crucian carp. FISH & SHELLFISH IMMUNOLOGY 2023; 136:108737. [PMID: 37030560 DOI: 10.1016/j.fsi.2023.108737] [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: 01/01/2023] [Revised: 03/19/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
Aeromonas hydrophila (A. hydrophila), a gram-negative bacterium, causes serious diseases with various clinical symptoms in farm raised fish. Thus, different ways to prevent and control A. hydrophila infection need to be explored, including a vaccine. In this study, we evaluated the protective efficacy of an oral vaccine prepared from the A. hydrophila TPS maltoporin (Malt) with Lactobacillus plantarum (L. plantarum) against A. hydrophila infection in crucian carp (Carassius auratus). For the in vivo experiment, the oral vaccine was administered to crucian carp by feeding them fish diets containing Lp-pPG-Malt, Lp-pPG and PBS for 28 days. The enzyme-linked immunosorbent assay (ELISA), leukocyte phagocytosis assay and real-time quantitative polymerase chain reaction (RT-qPCR) were performed to measure the protective efficacy of the Lp-pPG-Malt. ELISA and leukocyte phagocytosis assay confirmed that Lp-pPG-Malt significantly enhanced the IgM level and nonspecific immune response of crucian carp compared with the control groups (Lp-pPG and PBS). The RT-qPCR results showed that the Lp-pPG-Malt increased the relative expression of immune-related genes (IL-10, IL-1β, TNF-α, IFN-γ) of crucian carp in various tissues (liver, spleen, head kidney and hind intestine). Moreover, Lp-pPG-Malt significantly increased the relative percent survival of fish after intraperitoneal injection with A. hydrophila (55%) compared with the Lp-pPG and PBS groups (0%). These findings suggest that Lp-pPG-Malt can serve as an oral vaccine candidate for A. hydrophila infection and that Malt can be used as an effective antigen in crucian carp farming.
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Affiliation(s)
- Qing Yang
- Marine College, Shandong University, Weihai, 264209, China
| | - Bin-Tong Yang
- Marine College, Shandong University, Weihai, 264209, China; Shandong Fu Han Ocean Sci-Tech Co., Ltd, Haiyang, 265100, China
| | - Yuan-Huan Kang
- Marine College, Shandong University, Weihai, 264209, China; Shandong Key Laboratory of Animal Microecological Preparation, Tai'an, 271000, China.
| | - Wei Cong
- Marine College, Shandong University, Weihai, 264209, China.
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Li HJ, Yang BT, Sun YF, Zhao T, Hao ZP, Gu W, Sun MX, Cong W, Kang YH. Oral vaccination with recombinant Lactobacillus casei with surface displayed OmpK fused to CTB as an adjuvant against Vibrio mimicus infection in Carassius auratus. FISH & SHELLFISH IMMUNOLOGY 2023; 135:108659. [PMID: 36868535 DOI: 10.1016/j.fsi.2023.108659] [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: 01/15/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
Vibrio mimicus (V. mimicus) is a pathogenic bacterium that causes diseases in humans and various aquatic animals. A particularly efficient way to provide protection against V. mimicus is through vaccination. However, there are few commercial vaccines against V. mimics, especially oral vaccines. In our study, two surface-display recombinant Lactobacillus casei (L. casei) Lc-pPG-OmpK and Lc-pPG-OmpK-CTB were constructed using L. casei ATCC393 as an antigen delivery vector, outer membrane protein K (OmpK) of V. mimicus as an antigen, and cholera toxin B subunit (CTB) as a molecular adjuvant; furthermore, the immunological effects of recombinant L.casei in Carassius auratus (C. auratus) were assessed. The results indicated that oral recombinant L.casei Lc-pPG-OmpK and Lc-pPG-OmpK-CTB stimulated higher levels of serum-specific immunoglobulin M (IgM) and increased the activity of acid phosphatase (ACP), alkaline phosphatase (AKP), superoxide dismutase (SOD), lysozyme (LYS), lectin, C3, and C4 in C. auratus, compared with control groups (Lc-pPG group and PBS group). Furthermore, the expression of interleukin-1β (IL-1β), interleukin-10 (IL-10), tumor necrosis factor-α (TNF-α), and transforming growth factor-β (TGF-β) in the liver, spleen, head kidney, hind intestine and gills of C. auratus was significantly increased, compared with that in the controls. These results demonstrated that the two recombinant L. casei strains could effectively trigger humoral and cellular immunity in C. auratus. In addition, two recombinant L.casei strains were able to survive and colonize the intestine of C. auratus. Importantly, after being challenged with V. mimicus, C. auratus fed Lc-pPG-OmpK and Lc-pPG-OmpK-CTB exhibited greater survival rates than the controls (52.08% and 58.33%, respectively). The data showed that recombinant L. casei could elicit a protective immunological response in C. auratus. The effect of the Lc-pPG-OmpK-CTB group was better than that of the Lc-pPG-OmpK group, and Lc-pPG-OmpK-CTB was found to be an effective candidate for oral vaccination.
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Affiliation(s)
- Hong-Jin Li
- Marine College, Shandong University, Weihai, 264209, China; College of Veterinary Medicine / College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Bin-Tong Yang
- Marine College, Shandong University, Weihai, 264209, China; Shandong Fu Han Ocean Sci-Tech Co., Ltd, Haiyang, 265100, China
| | - Yu-Feng Sun
- College of Veterinary Medicine / College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Tong Zhao
- Marine College, Shandong University, Weihai, 264209, China; College of Veterinary Medicine / College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Zhi-Peng Hao
- Marine College, Shandong University, Weihai, 264209, China
| | - Wei Gu
- Shandong Key Laboratory of Animal Microecological Preparation, Shandong Baolai-Leelai Bio-Tech Co., Ltd, Tai'an, 271000, China
| | - Meng-Xia Sun
- Shandong Fu Han Ocean Sci-Tech Co., Ltd, Haiyang, 265100, China
| | - Wei Cong
- Marine College, Shandong University, Weihai, 264209, China.
| | - Yuan-Huan Kang
- Marine College, Shandong University, Weihai, 264209, China; Shandong Key Laboratory of Animal Microecological Preparation, Shandong Baolai-Leelai Bio-Tech Co., Ltd, Tai'an, 271000, China.
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Akshay SD, Nayak S, Deekshit VK, Rohit A, Maiti B. Differential expression of outer membrane proteins and quinolone resistance determining region mutations can lead to ciprofloxacin resistance in Salmonella Typhi. Arch Microbiol 2023; 205:136. [PMID: 36961627 DOI: 10.1007/s00203-023-03485-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 01/17/2023] [Accepted: 03/13/2023] [Indexed: 03/25/2023]
Abstract
Multi-drug resistance in Salmonella Typhi remains a public health concern globally. This study aimed to investigate the function of quinolone resistance determining region (QRDR) of gyrA and parC in ciprofloxacin (CIP) resistant isolates and examine the differential expression of outer membrane proteins (OMPs) on exposure to sub-lethal concentrations of CIP in S. Typhi. The CIP-resistant isolates were screened for mutations in the QRDR and analyzed for bacterial growth. Furthermore, major OMPs encoding genes such as ompF, lamB, yaeT, tolC, ompS1, and phoE were examined for differential expression under the sub-lethal concentrations of CIP by real-time PCR and SDS-PAGE. Notably, our study has shown a single-point mutation in gyrA at codon 83 (Ser83-tyrosine and Ser83-phenylalanine), also the rare amino acid substitution in parC gene at codon 80 (Glu80-glycine) in CIP-resistant isolates. Additionally, CIP-resistant isolates showed moderate growth compared to susceptible isolates. Although most of the OMP-encoding genes (tolC, ompS1, and phoE) showed some degree of upregulation, a significant level of upregulation (p < 0.05) was observed only for yaeT. However, ompF and lamB genes were down-regulated compared to CIP-susceptible isolates. Whereas OMPs profiling using SDS-PAGE did not show any changes in the banding pattern. These results provide valuable information on the QRDR mutation, and the difference in the growth, and expression of OMP-encoding genes in resistant and susceptible isolates of S. Typhi. This further provides insight into the involvement of QRDR mutation and OMPs associated with CIP resistance in S. Typhi.
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Affiliation(s)
- Sadanand Dangari Akshay
- Division of Infectious Diseases, Nitte (Deemed to Be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Srajana Nayak
- Division of Infectious Diseases, Nitte (Deemed to Be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Vijaya Kumar Deekshit
- Division of Infectious Diseases, Nitte (Deemed to Be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Anusha Rohit
- Division of Infectious Diseases, Nitte (Deemed to Be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
- Department of Microbiology, The Madras Medical Mission, 4-A, Dr, Mogappair, Chennai, Tamil Nadu, 600037, India
| | - Biswajit Maiti
- Division of Infectious Diseases, Nitte (Deemed to Be University), Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India.
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Wu X, Xing J, Tang X, Sheng X, Chi H, Zhan W. Protective cellular and humoral immune responses to Edwardsiella tarda in flounder (Paralichthys olivaceus) immunized by an inactivated vaccine. Mol Immunol 2022; 149:77-86. [DOI: 10.1016/j.molimm.2022.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/19/2022] [Accepted: 06/20/2022] [Indexed: 12/27/2022]
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Akshay SD, Anupama KP, Deekshit VK, Rohit A, Maiti B. Effect of sub-minimum inhibitory concentration of ceftriaxone on the expression of outer membrane proteins in Salmonella enterica serovar Typhi. World J Microbiol Biotechnol 2022; 38:190. [PMID: 35972699 DOI: 10.1007/s11274-022-03383-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 08/09/2022] [Indexed: 01/22/2023]
Abstract
Multi-drug resistance (MDR) in Salmonella is one of the major reasons for foodborne outbreaks worldwide. Decreased susceptibility of Salmonella Typhi to first-line drugs such as ceftriaxone, ciprofloxacin, and azithromycin has raised concern. Reduced outer membrane proteins (OMPs) permeability and increased efflux pump transportation are considered to be the main reasons for the emergence of antibiotic resistance in Salmonella. The present study aimed to assess the expression of OMPs at sub-lethal concentrations of ceftriaxone in S. Typhi (Sl5037/BC, and Sl05). The S. Typhi strains were exposed to sub-MIC and half of the sub-MIC concentrations of ceftriaxone at three different time intervals (0 min, 40 min, and 180 min) and analyzed for differential expression of OMPs. Further, the expression variation of OMP encoding genes (yaeT, ompX, lamb, ompA, and ybfM) in response to ceftriaxone was evaluated using real-time PCR. The genes like lamB, ompX, and yaeT showed significant downregulation (p < 0.05) compared to the control without antibiotic exposure, whereas ybfM and ompA showed a moderate downregulation. The expression of omp genes such as lamB, ompA, ompX, ybfM, and yaeT were found to be low in the presence of ceftriaxone, followed by time and dose-dependent. The study provides insights into the possible involvement of OMPs in drug resistance of S. Typhi, which could help develop a therapeutic strategy to combat MDR isolates of S. Typhi.
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Affiliation(s)
- Sadanand Dangari Akshay
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Karanth Padyana Anupama
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Vijaya Kumar Deekshit
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India
| | - Anusha Rohit
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India.,Department of Microbiology, The Madras Medical Mission, 4-A, Dr, Mogappair, Chennai, Tamil Nadu, 600037, India
| | - Biswajit Maiti
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research (NUCSER), Paneer Campus, Deralakatte, Mangalore, 575018, India.
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Comparative Reverse Vaccinology of Piscirickettsia salmonis, Aeromonas salmonicida, Yersinia ruckeri, Vibrio anguillarum and Moritella viscosa, Frequent Pathogens of Atlantic Salmon and Lumpfish Aquaculture. Vaccines (Basel) 2022; 10:vaccines10030473. [PMID: 35335104 PMCID: PMC8954842 DOI: 10.3390/vaccines10030473] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 02/06/2023] Open
Abstract
Marine finfish aquaculture is affected by diverse infectious diseases, and they commonly occur as co-infection. Some of the most frequent and prevalent Gram-negative bacterial pathogens of the finfish aquaculture include Piscirickettsia salmonis, Aeromonas salmonicida, Yersinia ruckeri, Vibrio anguillarum and Moritella viscosa. To prevent co-infections in aquaculture, polyvalent or universal vaccines would be ideal. Commercial polyvalent vaccines against some of these pathogens are based on whole inactivated microbes and their efficacy is controversial. Identification of common antigens can contribute to the development of effective universal or polyvalent vaccines. In this study, we identified common and unique antigens of P. salmonis, A. salmonicida, Y. ruckeri, V. anguillarum and M. viscosa based on a reverse vaccinology pipeline. We screened the proteome of several strains using complete available genomes and identified a total of 154 potential antigens, 74 of these identified antigens corresponded to secreted proteins, and 80 corresponded to exposed outer membrane proteins (OMPs). Further analysis revealed the outer membrane antigens TonB-dependent siderophore receptor, OMP assembly factor BamA, the LPS assembly protein LptD and secreted antigens flagellar hook assembly protein FlgD and flagellar basal body rod protein FlgG are present in all pathogens used in this study. Sequence and structural alignment of these antigens showed relatively low percentage sequence identity but good structural homology. Common domains harboring several B-cells and T-cell epitopes binding to major histocompatibility (MHC) class I and II were identified. Selected peptides were evaluated for docking with Atlantic salmon (Salmo salar) and Lumpfish MHC class II. Interaction of common peptide-MHC class II showed good in-silico binding affinities and dissociation constants between −10.3 to −6.5 kcal mol−1 and 5.10 × 10−9 to 9.4 × 10−6 M. This study provided the first list of antigens that can be used for the development of polyvalent or universal vaccines against these Gram-negative bacterial pathogens affecting finfish aquaculture.
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Liu H, Cao CY, Qiu FL, Huang HN, Xie H, Dong R, Shi YZ, Hu XN. Iron-Rich Conditions Induce OmpA and Virulence Changes of Acinetobacter baumannii. Front Microbiol 2021; 12:725194. [PMID: 34675899 PMCID: PMC8525545 DOI: 10.3389/fmicb.2021.725194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/19/2021] [Indexed: 11/24/2022] Open
Abstract
Background: Iron ions affect the expression of outer membrane protein A (OmpA), a major pathogenic protein in Acinetobacter baumannii. Objective: To analyze the effect of iron ions on the expression of the OmpA protein of A. baumannii and explore its association with the virulence of OmpA. Methods: Site-directed mutagenesis was used to construct ompA gene deletion strains and gene repair strains. The OmpA protein expression of A. baumannii under culture with different contents of iron ions was detected. The virulence of A. baumannii with different OmpA protein expression levels were evaluated in macrophages and mice. Results: OmpA protein levels of the three strains were enhanced under iron-rich conditions. They were reduced in the presence of the iron-chelating agent 2,2′-bipyridine. A. baumannii wild type and + ompA had a remarkable toxic effect on RAW246.7 macrophages (P < 0.05). In contrast, the ΔompA had a significantly reduced toxic effect on RAW246.7 macrophages (P < 0.05). The levels of the inflammatory factors IL-1β, IL-6, IL-8, and TNFα in the mice spleen were significantly increased in the + ompA strain treatment group compared with the ΔompA strain group (all P < 0.05). In addition, the levels were higher in the presence of iron ions than in the presence of the chelating agent. Conclusion: Iron-rich conditions increase the OmpA protein expression of A. baumannii. Strains with high OmpA protein expression were more invasive, which may be a key determinant of A. baumannii infection and pathogenicity. Iron control strategies might be used for the management of A. baumannii.
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Affiliation(s)
- Hui Liu
- Department of Clinical Laboratory, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Chun Yuan Cao
- Department of Clinical Laboratory, Fujian Longyan Center for Disease Control and Prevention, Longyan, China
| | - Fu Lan Qiu
- Department of Clinical Laboratory, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Hao Nan Huang
- Department of Clinical Laboratory, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Hongyan Xie
- Department of Clinical Laboratory, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Renkang Dong
- Department of Clinical Laboratory, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Yu Zhen Shi
- Intensive Care Unit, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
| | - Xiu Nian Hu
- Orthopaedic Surgery, Fujian Longyan First Hospital/Longyan First Affiliated Hospital of Fujian Medical University, Longyan, China
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15
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Yadav SK, Dash P, Sahoo PK, Garg LC, Dixit A. Recombinant outer membrane protein OmpC induces protective immunity against Aeromonashydrophila infection in Labeorohita. Microb Pathog 2021; 150:104727. [PMID: 33429054 DOI: 10.1016/j.micpath.2020.104727] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 01/06/2023]
Abstract
Aeromonashydrophila is an opportunistic pathogen that causes enormous loss to aquaculture industry. The outer membrane proteins of Aeromonas help in bacterium-host interaction, and are considered to be potential vaccine candidates. In the present study, we evaluated immunogenicity and protective efficacy of recombinant OmpC (rOmpC) of A. hydrophila in Indian major carp, Labeorohita. The rOmpC-vaccinated fish produced specific anti-rOmpC antibodies with a significant antibody titer, and the antisera could specifically detect the rOmpC in the cell lysates of Escherichia coli expressing rOmpC and cross-react with different Aeromonas lysates, indicating the suitability of the anti-rOmpC antisera to detect Aeromonas infection. A significant increase was noted in ceruloplasmin level, myeloperoxidase and anti-protease activities in transient and temporal manner the sera of the rOmpC-immunized fish as compared to PBS-control fish. Higher agglutination- and hemolytic activity titers in the anti-rOmpC antisera indicate stimulation of innate immunity. Expression of immune-related genes comprising various acute phase proteins, cytokines and inflammatory response molecules were modulated in the head kidney of rOmpC-immunized L. rohita. While IgM, IL1β, and TLR-22 were significantly up-regulated at early time points (3 h-72 h), the others showed a transient augmentation at both early and later time points (SOD, lysozymes C and G, NKEF-B, C3, CXCa and TNF-α) in the rOmpC-immunized L. rohita in comparison to PBS-injected controls. These data suggest that the rOmpC-induced immune response is temporally regulated to confer immunity. In vivo challenge of the rOmpC-immunized fish with A. hydrophila showed significantly greater survival when compared to PBS-injected control fish. Thus, our results highlight the immunomodulatory role of rOmpC and demonstrate its protective efficacy in L. rohita, along with the use of anti-rOmpC antisera in detecting Aeromonas infections.
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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, ICAR-Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, 751002, India
| | - Pramoda Kumar Sahoo
- Fish Health Management Division, ICAR-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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16
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Xu L, Che J, Xu Y, Chen Y, Li Y, Murtaza B, Wang L, Zhang M, Li X. Oral administration of microencapsulated egg yolk immunoglobulin (IgY) in turbot (Scophthalmus maximus) to combat against Edwardsiella tarda 2CDM001 infections. FISH & SHELLFISH IMMUNOLOGY 2020; 106:609-620. [PMID: 32795594 DOI: 10.1016/j.fsi.2020.08.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/27/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
Edwardsiellosis, an extremely harmful disease can be caused by Edwardsiella tarda, severely restricts the development of turbot (Scophthalmus maximus) farming worldwide, especially in China. This study aimed to establish an effective and feasible prophylaxis by feeding chitosan-alginate coated egg yolk immunoglobulin (IgY) against E. tarda 2CDM001 infections in the process of turbot farming. Enzyme-linked immunosorbent assays proved that the obtained specific IgY could specifically target E. tarda 2CDM001 and five other E. tarda isolates (1a5p, Hz-s, 1a1s, fs-a1 and 58p8). In-vitro, the bacteriostatic effects of specific IgY showed dose dependencies at concentrations ranging from 1 to 10 mg/mL. Moreover, E. tarda 2CDM001 incubated with 10 mg/mL specific IgY could induce the destruction of cell wall structures and significantly decrease the bacterial surface hydrophobicity (p < 0.05). In this study, turbots were challenged with 107 CFU E. tarda 2CDM001 after seven days of continuous feeding with basal diets containing microencapsulated IgYs. Survival rates of the 5%, 3% and 1% microencapsulated specific IgY groups were 63.3%, 56.7% and 20% on the tenth day post infection, respectively, while the turbots in the positive control and non-specific IgY groups all died within ten days. Oral administration of basal diets containing 5% microencapsulated specific IgY significantly reduced IL-1β, IL-8, TNF-α and C3 transcript levels in the head kidney and spleen of turbots compared with the positive and non-specific IgY groups at 24 h after E. tarda 2CDM001 challenging (p < 0.05). Pathological increase of leukocytes in the specific IgY group was significantly lower than that in the positive control and non-specific IgY groups (p < 0.05), decreasing slowly after 24 h of infection and showing a recovery trend. Erythrocyte counts and hemoglobin concentrations of turbots in positive and non-specific IgY groups showed a marked decrease compared with the negative and specific groups at 96 h after E. tarda 2CDM001 infection (p < 0.05). These results suggest that passive immunity via feeding microencapsulated specific IgY could be used as a valuable preventative in turbot against E. tarda 2CDM001 infections.
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Affiliation(s)
- Le Xu
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Jian Che
- Dalian Xinyulong Marine Biological Seed Technology Co., Ltd., Dalian, 116222, China; Center for Food Safety of Animal Origin, Ministry of Education, Dalian University of Technology, Dalian, 116600, China
| | - Yongping Xu
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China; Center for Food Safety of Animal Origin, Ministry of Education, Dalian University of Technology, Dalian, 116600, China
| | - Yan Chen
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Yuan Li
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Bilal Murtaza
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Lili Wang
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China; Center for Food Safety of Animal Origin, Ministry of Education, Dalian University of Technology, Dalian, 116600, China
| | - Meixia Zhang
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China
| | - Xiaoyu Li
- School of Bioengineering, Dalian University of Technology, Dalian, 116024, China; Center for Food Safety of Animal Origin, Ministry of Education, Dalian University of Technology, Dalian, 116600, China.
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Maiti B, Dubey S, Munang'andu HM, Karunasagar I, Karunasagar I, Evensen Ø. Application of Outer Membrane Protein-Based Vaccines Against Major Bacterial Fish Pathogens in India. Front Immunol 2020; 11:1362. [PMID: 32849496 PMCID: PMC7396620 DOI: 10.3389/fimmu.2020.01362] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 05/28/2020] [Indexed: 12/23/2022] Open
Abstract
Aquaculture is one of the fastest-growing food-producing sectors in the world. However, its growth is hampered by various disease problems due to infectious microorganisms, including Gram-negative bacteria in finfish aquaculture. Disease control in aquaculture by use of antibiotics is not recommended as it leads to antibiotic residues in the final product, selection, and spread of antibiotic resistance in the environment. Therefore, focus is on disease prevention by vaccination. All Gram-negative bacteria possess surface-associated outer membrane proteins (OMPs), some of which have long been recognized as potential vaccine candidates. OMPs are essential for maintaining the integrity and selective permeability of the bacterial membrane and play a key role in adaptive responses of bacteria such as solute and ion uptake, iron acquisition, antimicrobial resistance, serum resistance, and bile salt resistance and some adhesins have virulence attributes. Antigenic diversity among bacterial strains even within the same bacterial species has constrained vaccine developments, but OMPs that are conserved across serotypes could be used as potential candidates in vaccine development, and several studies have demonstrated their efficacy and potential as vaccine candidates. In this review, we will look into the application of OMPs for the design of vaccines based on recombinant proteins, subunit vaccines, chimeric proteins, and DNA vaccines as new-generation vaccine candidates for major bacterial pathogens of fish for sustainable aquaculture.
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Affiliation(s)
- Biswajit Maiti
- Nitte University Centre for Science Education and Research, Mangaluru, India
| | - Saurabh Dubey
- Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Hetron Mweemba Munang'andu
- Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | | | - Indrani Karunasagar
- Nitte University Centre for Science Education and Research, Mangaluru, India
- NITTE (Deemed to be University), Mangaluru, India
| | - Øystein Evensen
- Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
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18
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Nayak SK. Current prospects and challenges in fish vaccine development in India with special reference to Aeromonas hydrophila vaccine. FISH & SHELLFISH IMMUNOLOGY 2020; 100:283-299. [PMID: 32088285 DOI: 10.1016/j.fsi.2020.01.064] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 12/04/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
Infectious diseases are adversely affecting aquaculture practices throughout world and Asian countries are no exception. Indian aquaculture practices are facing serious setback due to a variety of infectious agent's which are responsible for severe mortality and morbidity of all the cultured freshwater fish species leading to severe economic losses. The emergence of antibiotic resistant pattern, residual effect and environmental degradation due to indiscriminate use of antibiotics has necessitates the development of suitable alternate prophylaxis measures for better protection. In this regard, vaccine(s) has proved to be an effective strategy against pathogens to improve the fish production. Over the years numerous studies have been conducted to develop vaccine(s) against different pathogens. While most of the efforts are made to develop vaccine against bacterial pathogens especially against Aeromoniasis and Edwardsiellosis, few attempts have also been made against certain other bacterial, parasitic and fungal pathogens as well. Despite various successful experimental attempts, till date no vaccines against any of the pathogens are commercially available for Indian aquaculture. This review principally focuses on the current state of art in the development of vaccine against different microbial pathogens in general and Aeromonas hydrophila in particular since the bacterium is a major pathogen which is involved in a number of disease conditions in all the cultured fish species in India. Herein in this review, details of various experimental approaches made to find out a potential vaccine candidate which in turn can induce protective immune responses in host alongwith the constraints associated with it in developing a suitable vaccine against this bacterium and its market potential have been illustrated from an Indian perspective.
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Affiliation(s)
- Sukanta Kumar Nayak
- Department of Biotechnology, North Orissa University, Takatpur, Baripada, 757 003, Odisha, India.
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19
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Dubey S, Maiti B, Kim SH, Sivadasan SM, Kannimuthu D, Pandey PK, Girisha SK, Mutoloki S, Chen SC, Evensen Ø, Karunasagar I, Munang'andu HM. Genotypic and phenotypic characterization of Edwardsiella isolates from different fish species and geographical areas in Asia: Implications for vaccine development. JOURNAL OF FISH DISEASES 2019; 42:835-850. [PMID: 30851008 DOI: 10.1111/jfd.12984] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
The genus Edwardsiella is one of the major causes of fish diseases globally. Herein, we examined 37 isolates from ten different fish species from India, South Korea and Taiwan to gain insight into their phenotypic and genotypic properties, of which 30 were characterized as E. tarda with phenotypic homology estimated at 85.71% based on API-20E biochemical tests. Genotyping using 16S rRNA put all isolates together with E. anguillarum, E. hoshinae, E. tarda, E. piscicida and E. ictaluri reference strains in a monophyletic group. In contrast, the gyrB phylogenetic tree clearly separated E. ictaluri, E. tarda and E. hoshinae reference strains from our isolates and put our isolates into two groups with group I being homologous with the E. anguillarum reference strain while group II was homologous with the E. piscicida reference strain. Hence, our findings point to E. piscicida and E. anguillarum as species infecting different fish species in Asia. Homology of the ompW protein suggested that strains with broad protective coverage could be identified as vaccine candidates. This study underscores the importance of combining genotyping with phenotyping for valid species classification. In addition, it accentuates the importance of phylogenetic comparison of bacterial antigens for identification of potential vaccine candidates.
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Affiliation(s)
- Saurabh Dubey
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Biswajit Maiti
- UNESCO MIRCEN for Medical and Marine Biotechnology, Nitte University Centre for Science Education and Research, NITTE (Deemed to be University), Mangalore, India
| | | | - Sangeetha Madambithara Sivadasan
- Department of Fisheries Microbiology, College of Fisheries, Karnataka Veterinary Animal & Fisheries Sciences University, Mangalore, India
| | | | | | - Shivani Kallappa Girisha
- Department of Fisheries Microbiology, College of Fisheries, Karnataka Veterinary Animal & Fisheries Sciences University, Mangalore, India
| | - Stephen Mutoloki
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Shih-Chu Chen
- Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - Øystein Evensen
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
| | - Indrani Karunasagar
- UNESCO MIRCEN for Medical and Marine Biotechnology, Nitte University Centre for Science Education and Research, NITTE (Deemed to be University), Mangalore, India
| | - Hetron Mweemba Munang'andu
- Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Oslo, Norway
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Zhu Z, Dong C, Weng S, He J. Identification of outer membrane protein TolC as the major adhesin and potential vaccine candidate for Vibrio harveyi in hybrid grouper, Epinephelus fuscoguttatus (♀) × E. lanceolatus (♂). FISH & SHELLFISH IMMUNOLOGY 2019; 86:143-151. [PMID: 30453046 DOI: 10.1016/j.fsi.2018.11.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 05/21/2023]
Abstract
Vibrio harveyi is a serious pathogen of scale drop and muscle necrosis disease in marine commercial fishes. Adhesion to and colonization of the host cells surfaces is the first and crucial step for pathogenic bacterial infection, which is usually mediated by outer membrane proteins (Omps). The objectives of this study were to identify the major adhesin in Omps that plays the essential role in adhesion of V. harveyi to the host cells, and to assess the potential of this adhesin as a vaccine candidate for V. harveyi infection. We observed that pathogenic V. harveyi adhered to the surface of grouper embryonic cells (GEM cells) and induced apoptosis of them. Native Omps were extracted from nine different V. harveyi strains, and five common Omp bands were isolated by SDS-PAGE analysis. Western blot analysis and an anti-native Omp antibodies blocking assay indicated that one strong and several weak immunoreactivity Omps bands presence. Next, a total of five Omps, including TolC, Agg (Agglutination protein), Omp47, Fla (Flagellin), and OmpW, were identified and their encoding genes were cloned, characterized, and expressed in E. coli. The purified recombinant TolC could competitively inhibit the invasion of V. harveyi to GEM cells in vitro, and anti-TolC antibody also could significantly block the adhesion of V. harveyi to GEM cells. When used to immunize hybrid groupers, the recombinant TolC could confer significant protection to fish against experimental V. harveyi challenge. These data suggested that outer membrane protein TolC functions as a major adhesin in V. harveyi and could be a potential vaccine candidate for V. harveyi infection.
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Affiliation(s)
- Zhiming Zhu
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Chuanfu Dong
- State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Shaoping Weng
- State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Jianguo He
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; State Key Laboratory of Biocontrol / MOE Key Laboratory of Aquatic Product Safety, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China; Institute of Aquatic Economic Animals, and Guangdong Province Key Laboratory for Aquatic Economic Animals, Sun Yat-sen University, Guangzhou, 510275, PR China.
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21
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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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22
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Guo Z, Lin Y, Wang X, Fu Y, Lin W, Lin X. The protective efficacy of four iron-related recombinant proteins and their single-walled carbon nanotube encapsulated counterparts against Aeromonas hydrophila infection in zebrafish. FISH & SHELLFISH IMMUNOLOGY 2018; 82:50-59. [PMID: 30086377 DOI: 10.1016/j.fsi.2018.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/27/2018] [Accepted: 08/03/2018] [Indexed: 06/08/2023]
Abstract
Iron-related proteins play important roles in iron homeostasis, and they may be potential vaccine candidates against pathogenic Aeromonas hydrophila. In addition, the encapsulation of antigens in single-walled carbon nanotubes (SWCNTs) has recently been shown to effectively stimulate the host immune response. To investigate the immune response of zebrafish to iron-related proteins and SWCNT-encapsulated proteins, we overexpressed and purified four iron-related recombinant proteins (P55870, A0KGK5, A0KPP0, and A0KIY3) from A. hydrophila. We then vaccinated zebrafish with these proteins and their SWCNT-encapsulated counterparts via both intraperitoneal injection and bath immunization. The target proteins evoked an immune response in zebrafish after intraperitoneal injection, and SWCNT-encapsulation significantly increased the immune response after bath immunization. When challenged with virulent A. hydrophila, zebrafish administered 5 μg intraperitoneal injections of SWCNT-P55870, A0KGK5, A0KPP0, or A0KIY3 had remarkably high relative percent survivals (RPSs) (50%, 55.6%, 66.7%, and 94.44% respectively). The RPSs of zebrafish vaccinated via immunization bath with 40 mg/L SWCNT-encapsulated counterparts were also high (52.94%, 55.56%, 61.11%, and 86.11%, respectively). These results indicated that zebrafish vaccinated with P55870, A0KGK5, SWCNT-P55870, and SWCNT-A0KGK5 were partially protected, while A0KPP0 and A0KIY3 were promising vaccine candidates against pathogenic A. hydrophila infection.
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Affiliation(s)
- Zhuang Guo
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Yuexu Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Xiaoyun Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Yuying Fu
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Wenxiong Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China
| | - Xiangmin Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 35002, PR China; Key Laboratory of Crop Ecology and Molecular Physiology (Fujian Agriculture and Forestry University), Fujian Province University, Fuzhou 35002, PR China.
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23
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Wang E, Qin Z, Yu Z, Ai X, Wang K, Yang Q, Liu T, Chen D, Geng Y, Huang X, Ouyang P, Lai W. Molecular Characterization, Phylogenetic, Expression, and Protective Immunity Analysis of OmpF, a Promising Candidate Immunogen Against Yersinia ruckeri Infection in Channel Catfish. Front Immunol 2018; 9:2003. [PMID: 30271401 PMCID: PMC6146100 DOI: 10.3389/fimmu.2018.02003] [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: 06/01/2018] [Accepted: 08/14/2018] [Indexed: 11/23/2022] Open
Abstract
Outer membrane porins, as the major components of Gram-negative bacterial membrane proteins, have been proven to be involved in interactions with the host immune system and potent protective antigen candidates against bacterial infection in fish. Outer membrane porin F (OmpF) is one of the major porins of Yersinia ruckeri (Y. ruckeri), the causative agent of enteric red mouth disease of salmonid and non-salmonid fish. In the present study, the molecular characterization and phylogenetic analysis of OmpF gene was studied, heterogenous expression, immunogenicity and protective immunity of OmpF were systemically evaluated as a subunit vaccine for channel catfish against Y. ruckeri infection. The results showed that OmpF gene was highly conserved among 15 known Yersinia species based on the analysis of conserved motifs, sequences alignment and phylogenetic tree, and was subjected to negative/purifying selection with global dN/dS ratios value of 0.649 throughout the evolution. Besides, OmpF was also identified to have immunogenicity by western blotting and was verified to be located on the surface of Y. ruckeri using cell surface staining and indirect immunofluorescence assays. Moreover, recombinant OmpF (rtOmpF) as a subunit vaccine was injected with commercial adjuvant ISA763, significantly enhanced the immune response by increasing serum antibody levels, lysozyme activity, complement C3 activity, total protein content, SOD activity, immune-related genes expression in the head kidney and spleen, and survival percent of channel catfish against Y. ruckeri infection. Thus, our present results not only enriched the information of molecular characterization and phylogenetics of OmpF, but also demonstrated that OmpF holds promise to be used as a potential antigen against Y. ruckeri infection in fish.
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Affiliation(s)
- Erlong Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhenyang Qin
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zehui Yu
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Xiaohui Ai
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Kaiyu Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Qian Yang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Tao Liu
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Defang Chen
- Department of Aquaculture, College of Animal Science & Technology, Sichuan Agricultural University, Chengdu, China
| | - Yi Geng
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xiaoli Huang
- Department of Aquaculture, College of Animal Science & Technology, Sichuan Agricultural University, Chengdu, China
| | - Ping Ouyang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Weimin Lai
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
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24
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Ma W, Jia J, Huang X, Xie W, Zhang X, Tang J, Lin C, Zhao L, Fang P. Stable isotope labelling by amino acids in cell culture (SILAC) applied to quantitative proteomics of Edwardsiella tarda ATCC 15947 under prolonged cold stress. Microb Pathog 2018; 125:12-19. [PMID: 30201590 DOI: 10.1016/j.micpath.2018.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 09/01/2018] [Accepted: 09/05/2018] [Indexed: 01/15/2023]
Abstract
Edwardsiella tarda poses a threat to human health and has resulted in enormous economic losses in aquaculture. Low temperatures are usually applied to contain the growth of this microorganism. In this study, stable isotope labelling by amino acids in cell culture (SILAC) was used to conduct comparative proteomic quantitation of E. tarda ATCC 15947 under cold stress for two weeks. We identified 1391 proteins, of which 898 were quantifiable. Of these, 72 proteins were upregulated and 164 were downregulated in response to cold stress. Even though E. tarda ATCC 15947 is not a psychrophile, several key proteins related to DNA synthesis and transcription were significantly upregulated. Additionally, proteins related to haemolytic activities and gluconeogenesis were upregulated, even though E. tarda ATCC 15497 is considered non-virulent in aquaculture. This study therefore delineated the specific proteomic response of this E. tarda ATCC 15947 to prolonged cold stress.
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Affiliation(s)
- Weixing Ma
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China; Qingdao University of Science and Technology, No. 53, Zhengzhou Road, Qingdao, 266042, China
| | - Juntao Jia
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China.
| | - Xiaohua Huang
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
| | - Wancui Xie
- Qingdao University of Science and Technology, No. 53, Zhengzhou Road, Qingdao, 266042, China
| | - Xiaoliang Zhang
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
| | - Jing Tang
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
| | - Chao Lin
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
| | - Liqing Zhao
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
| | - Peipei Fang
- Shandong Entry-Exit Inspection and Quarantine Bureau, No. 70, Qutangxia Road, Qingdao, 266002, China
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25
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Le H, LiHua D, JianJun F, Peng L, SongLin G. Immunogenicity study of an expressed outer membrane protein U of Vibrio vulnificus in Japanese eel (Anguilla japonica). J Appl Microbiol 2018; 125:1642-1654. [PMID: 30106200 DOI: 10.1111/jam.14068] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/27/2018] [Accepted: 08/07/2018] [Indexed: 12/23/2022]
Abstract
AIMS Vibrio vulnificus is a common bacterial pathogen causing haemorrhagic septicaemia in eel farming. This study investigates the immunogenicity of an outer membrane protein U (OmpU) of V. vulnificus and the feasibility of the protein as a new subunit vaccine against V. vulnificus. METHODS AND RESULTS Partial gene sequence of the OmpU of V. vulnificus was cloned, and then the OmpU was expressed and purified. Three groups of Japanese eels (Anguilla japonica) were intraperitoneally (i.p) injected with bovine serum albumin (BSA group), formalin-killed whole cell of V. vulnificus (FKC group) or the expressed OmpU of V. vulnificus (OMP group). On 14, 21, 28 and 42 days postimmunization (dpi), the whole blood cells were collected to evaluate the stimulation index (SI) and bactericidal activity. The serum was obtained to assess the titres of specific antibody, lysozyme activity, complement activity and bactericidal activity. The lysozyme activities in the suspension of kidney, skin mucus and liver in eels were also ascertained. The results showed that the SI and the titres of anti-V. vulnificus antibody in the OMP group was significantly increased on 28 dpi; lysozyme activity in the kidney and skin mucus of OMP group on 42 and 14 dpi were both significantly higher than BSA group; eels in OMP group showed strong bactericidal capacity on 21 and 28 days; and the relative percent survival of OMP vs BSA group after challenged by V. vulnificus on 28 dpi was 80%. CONCLUSIONS These results showed that the expressed OmpU of V. vulnificus could significantly improve the immune function of Japanese eel and the resistance of eels to the infection of V. vulnificus. SIGNIFICANCE AND IMPACT OF THE STUDY This study offered an alternative preliminary strategy of making aquaculture vaccines against V. vulnificus for eel farming.
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Affiliation(s)
- H Le
- Fishery College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, China
| | - D LiHua
- Fishery College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, China
| | - F JianJun
- Fishery College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, China
| | - L Peng
- Fishery College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, China
| | - G SongLin
- Fishery College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education, Xiamen, China
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26
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Xu G, Tang X, Shang X, Li Y, Wang J, Yue J, Li Y. Identification of immunogenic outer membrane proteins and evaluation of their protective efficacy against Stenotrophomonas maltophilia. BMC Infect Dis 2018; 18:347. [PMID: 30053835 PMCID: PMC6062925 DOI: 10.1186/s12879-018-3258-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 07/17/2018] [Indexed: 12/27/2022] Open
Abstract
Background Stenotrophomonas maltophilia (S. maltophilia) is an emerging global multiple-drug-resistant organism. It becomes increasingly challenging to treat S. maltophilia infection effectively. Novel therapeutic and preventive approaches targeting S. maltophilia infection are still lacking. This study aims to isolate outer membrane proteins (Omps) from S. maltophilia and use immunoproteomic technology to identify potential vaccine candidates of Omps against S. maltophilia infections. Methods Omps from S. maltophilia culture were separated by two-dimensional electrophoresis and identified by matrix-assisted laser desorption/ionization time of flight mass spectrometry and nano liquid chromatography coupled fourier transform ion cyclotron resonance tandem mass spectrometry. Recombinant Omps were prepared and used to immunize mice, and the potency of mouse anti-Omp serum was tested in opsonophagocytic killing assay (OPKA). The effects of immunization with recombinant Omp on blood and tissue bacterial loads in a mouse model of S. maltophilia-induced infection were analyzed. Results Outer membrane protein A (OmpA) and Smlt4123 were identified by mass spectrometry. Mouse anti-Smlt4123 serum significantly reduced the bacterial counts in healthy individuals’ blood in OPKA (P < 0.05) but mouse anti-OmpA serum did not. Enzyme-linked immunosorbent assay revealed that the antibody subtype of mouse anti-Smlt4123 antibody was IgG1. Eight hours after an intraperitoneal challenge with S. maltophilia, the bacterial loads in mouse blood were significantly lower in the mice receiving immunization with recombinant Smlt4123 than in the control mice receiving no immunization (P < 0.05), whereas the bacterial loads in other organs, such as the liver, spleen, lung, and kidney were similar in the two groups. Conclusions The results revealed that the immunoproteomic approach was an efficient way to screen the immunogenic protein of Stenotrophomonas maltophilia. Moreover, the recombinant Smlt4123 had potential to protect mice from bacteremia caused by S. maltophilia in the early stages. Electronic supplementary material The online version of this article (10.1186/s12879-018-3258-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guangyang Xu
- No. 307 Hospital of PLA of Anhui Medical University, Hefei, 230032, China.,Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China.,Departmen of Respiratory Diseases, Taizhou Second People's Hospital, Taizhou, 225500, Jiangsu, China
| | - Xueping Tang
- Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China
| | - Xueyi Shang
- Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China
| | - Yan Li
- No. 307 Hospital of PLA of Anhui Medical University, Hefei, 230032, China.,Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China
| | - Jing Wang
- No. 307 Hospital of PLA of Anhui Medical University, Hefei, 230032, China.,Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China
| | - Junjie Yue
- Beijing Institute of Biotechnology, Beijing, 100071, China.
| | - Yan Li
- No. 307 Hospital of PLA of Anhui Medical University, Hefei, 230032, China. .,Department of Critical Care Medicine, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, 100071, China.
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27
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Shahin K, Thompson KD, Inglis NF, Mclean K, Ramirez-Paredes JG, Monaghan SJ, Hoare R, Fontaine M, Metselaar M, Adams A. Characterization of the outer membrane proteome of Francisella noatunensis subsp. orientalis. J Appl Microbiol 2018; 125:686-699. [PMID: 29777634 DOI: 10.1111/jam.13918] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 05/03/2018] [Accepted: 05/11/2018] [Indexed: 11/28/2022]
Abstract
AIMS The aims of the current study were to characterize the outer membrane proteins (OMPs) of Francisella noatunensis subsp. orientalis (Fno) STIR-GUS-F2f7, and identify proteins recognized by sera from tilapia, Oreochromis niloticus, (L) that survived experimental challenge with Fno. METHODS AND RESULTS The composition of the OMPs of a virulent strain of Fno (STIR-GUS-F2f7), isolated from diseased red Nile tilapia in the United Kingdom, was examined. The sarcosine-insoluble OMPs fraction was screened with tilapia hyperimmune sera by western blot analysis following separation of the proteins by 1D SDS-PAGE. Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) was used to identify the various proteins present in the OMP profile. Two hundred and thirty-nine proteins were identified, of which 44 were found in the immunogenic band recognized by the tilapia hyperimmune serum. In silico analysis was performed to predict the function and location of the OMPs identified by MS. CONCLUSIONS Using a powerful proteomic-based approach in conjugation with western immunoblotting, proteins comprising the outer membrane fraction of Fno STIR-GUS-F2f7 were identified, catalogued and screened for immune recognition by tilapia sera. SIGNIFICANCE AND IMPACT OF THE STUDY The current study is the first report on the characterization of Fno-OMPs. The findings here provide preliminary data on bacterial surface proteins that exist in direct contact with the host's immune defences during infection and offer an insight into the pathogenesis of Fno.
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Affiliation(s)
- K Shahin
- Faculty of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK.,Aquatic Animals Diseases Lab, Aquaculture Division, National Institute of Oceanography and Fisheries, Suez, Egypt
| | - K D Thompson
- Moredun Research Institute, Pentlands Science Park, Penicuik, Midlothian, UK
| | - N F Inglis
- Moredun Research Institute, Pentlands Science Park, Penicuik, Midlothian, UK
| | - K Mclean
- Moredun Research Institute, Pentlands Science Park, Penicuik, Midlothian, UK
| | - J G Ramirez-Paredes
- Faculty of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK
| | - S J Monaghan
- Faculty of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK
| | - R Hoare
- Faculty of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK
| | - M Fontaine
- Benchmark Animal Health, Bush House, Edinburgh Technopole, Edinburgh, Midlothian, UK
| | - M Metselaar
- Benchmark Animal Health, Bush House, Edinburgh Technopole, Edinburgh, Midlothian, UK
| | - A Adams
- Faculty of Natural Sciences, Institute of Aquaculture, University of Stirling, Stirling, Scotland, UK
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28
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Munang'andu HM. Intracellular Bacterial Infections: A Challenge for Developing Cellular Mediated Immunity Vaccines for Farmed Fish. Microorganisms 2018; 6:microorganisms6020033. [PMID: 29690563 PMCID: PMC6027125 DOI: 10.3390/microorganisms6020033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/15/2018] [Accepted: 04/20/2018] [Indexed: 12/15/2022] Open
Abstract
Aquaculture is one of the most rapidly expanding farming systems in the world. Its rapid expansion has brought with it several pathogens infecting different fish species. As a result, there has been a corresponding expansion in vaccine development to cope with the increasing number of infectious diseases in aquaculture. The success of vaccine development for bacterial diseases in aquaculture is largely attributed to empirical vaccine designs based on inactivation of whole cell (WCI) bacteria vaccines. However, an upcoming challenge in vaccine design is the increase of intracellular bacterial pathogens that are not responsive to WCI vaccines. Intracellular bacterial vaccines evoke cellular mediated immune (CMI) responses that “kill” and eliminate infected cells, unlike WCI vaccines that induce humoral immune responses whose protective mechanism is neutralization of extracellular replicating pathogens by antibodies. In this synopsis, I provide an overview of the intracellular bacterial pathogens infecting different fish species in aquaculture, outlining their mechanisms of invasion, replication, and survival intracellularly based on existing data. I also bring into perspective the current state of CMI understanding in fish together with its potential application in vaccine development. Further, I highlight the immunological pitfalls that have derailed our ability to produce protective vaccines against intracellular pathogens for finfish. Overall, the synopsis put forth herein advocates for a shift in vaccine design to include CMI-based vaccines against intracellular pathogens currently adversely affecting the aquaculture industry.
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Affiliation(s)
- Hetron Mweemba Munang'andu
- Section of Aquatic Medicine and Nutrition, Department of Basic Sciences and Aquatic Medicine, Faculty of Veterinary Medicine and Biosciences, Norwegian University of Life Sciences, Ullevålsveien 72, P.O. Box 8146, Dep NO-0033, 046 Oslo, Norway.
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Wang Y, Wang E, He Y, Wang K, Yang Q, Wang J, Geng Y, Chen D, Huang X, Ouyang P, Lai W, Shi C. Identification and screening of effective protective antigens for channel catfish against Streptococcus iniae. Oncotarget 2018; 8:30793-30804. [PMID: 28415641 PMCID: PMC5458168 DOI: 10.18632/oncotarget.16475] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 03/13/2017] [Indexed: 11/25/2022] Open
Abstract
Vaccination is a potential approach for prevention and control of disease in fish. The use of genetically engineered vaccines is an effective method and a green intervention to control bacterial infection in aquaculture. However, efforts to develop these vaccines are limited by the lack of conserved protective antigens. In this study, three candidate immunogens (Srr, NeuA, and Hsp) of the pathogenic Streptococcus iniae strain DGX07 isolated from diseased channel catfish were identified and analyzed. Molecular cloning, expression, and purification of candidate antigen genes were carried out to obtain the candidate immunogens in the form of recombinant subunit vaccines. Western blotting was performed to evaluate immunogenicity in vitro and channel catfish were vaccinated by intraperitoneal injection and the specific antibody titers and relative percent of survival were determined to evaluate immune protection in vivo. The results showed that these three candidate immunogens were expressed correctly as recombinant proteins fused with His tags, with molecular weights of 70 kDa for Srr, 86 kDa for NeuA, and 51 kDa for Hsp, respectively. Moreover, each immunogen was predicted to be located either extracellularly or on the surface of S. iniae, and were able to offer protection against S. iniae infection in the form of recombinant subunit vaccines with adjuvant ISA763, especially Srr, with a relative percent of survival of 70% for Srr, 55% for NeuA, and 50% for Hsp, respectively.
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Affiliation(s)
- Yajun Wang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China.,Pearl River Fishery Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
| | - Erlong Wang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yang He
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Kaiyu Wang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qian Yang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Jun Wang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yi Geng
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Defang Chen
- Department of Aquaculture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaoli Huang
- Department of Aquaculture, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ping Ouyang
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Weimin Lai
- Department of Basic Veterinary, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Cunbin Shi
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Science, Guangzhou, China
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Aldubyan MA, Almami IS, Benslimane FM, Alsonosi AM, Forsythe SJ. Comparative Outer Membrane Protein Analysis of High and Low-Invasive Strains of Cronobacter malonaticus. Front Microbiol 2017; 8:2268. [PMID: 29204140 PMCID: PMC5698278 DOI: 10.3389/fmicb.2017.02268] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 11/03/2017] [Indexed: 01/25/2023] Open
Abstract
Cronobacter are an important group of foodborne pathogens that has been linked to life-threatening infections in both infants and adults. The major infections associated with Cronobacter species are neonatal meningitis, necrotizing enterocolitis, and septicaemia. There are seven species in the Cronobacter genus, of which only three are of clinical importance; Cronobacter sakazakii, Cronobacter malonaticus, and Cronobacter turicensis. To date most studies have focussed on C. sakazakii as it is the major species associated with neonatal infections. However, recently C. malonaticus, in particular sequence type 7 (ST7), has been noted as being prevalent in adult infections and therefore warranting further investigation. In this study, eight strains of C. malonaticus ST7, that had been isolated from a wide range of sources and varied in their in vitro virulence, were chosen for proteomic analysis of their outer membrane proteins (OMPs). One-dimensional gel analysis revealed a ~29 kDa size band that was only present in the highly invasive strains. Subsequent mass spectrometric analysis identified several peptides that matched the flagellin protein. The presence of flagellin protein was confirmed in 2D gel spot. Mass spectrometry analysis of total OMPs revealed that the four highly invasive C. malonaticus strains expressed the main flagellum proteins that were absent from the four low invasive strains. These were the flagellar hook protein FlgE, flagellar hook-associated protein 1, flagellar hook-associated protein, flagellin, and flagellar hook-filament junction protein FlgL. This data indicates that C. malonaticus flagellar proteins may have an important role in the organism's invasion properties.
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Affiliation(s)
- Maha A Aldubyan
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom.,Department of Pharmacology, College of Pharmacy, Qassim University, Al-Qassim, Saudi Arabia
| | - Ibtesam S Almami
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom.,Biology Department, College of Science, Qassim University, Al-Qassim, Saudi Arabia
| | - Fatiha M Benslimane
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom.,Biomedical Research Institute, Qatar University, Doha, Qatar
| | - Abdlrhman M Alsonosi
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Stephen J Forsythe
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
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Baliga P, Shekar M, Venugopal MN. Potential Outer Membrane Protein Candidates for Vaccine Development Against the Pathogen Vibrio anguillarum: A Reverse Vaccinology Based Identification. Curr Microbiol 2017; 75:368-377. [PMID: 29119233 DOI: 10.1007/s00284-017-1390-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/31/2017] [Indexed: 01/07/2023]
Abstract
Reverse vaccinology is a widely used approach that has facilitated the rapid identification of vaccine candidates suitable in vaccine development for pathogens. Vibrio anguillarum is a major pathogen responsible for vibriosis in fish and shellfish leading to huge economic losses to the aquaculture industry. Although commercial vaccines are available for fish against this bacterium they have their own limitations. In this study, we used the reverse vaccinology strategy to screen and identify V. anguillarum outer membrane proteins (OMPs) that could serve as vaccine candidates. Our analysis identified 23 antigenic outer membrane proteins which were highly conserved (>98% identity) across serovars of this bacterium. Of the 23, two were identified as outer membrane lipoproteins. Among the OMPs identified 18 were novel to this study and conserved across several Vibrio spp. with an identity of 21-93%. While the least (>48%) identity was observed for V. anguillarum ferrichrome-iron transporter protein, the highest identity (>80%) was seen for outer membrane proteins OmpK, BamA, OmpU, Fatty acid transporter, and two hypothetical proteins. These potential vaccine targets identified could contribute to the development of effective vaccine not only against V. anguillarum but also across other Vibrio spp. In addition, several B-cell and T-cell epitopes were predicted for the novel OMPs in this study which could aid in narrowing down peptide selection in designing a suitable epitope-based vaccine.
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Affiliation(s)
- Pallavi Baliga
- Department of Fisheries Microbiology, College of Fisheries, Karnataka Veterinary, Animal and Fisheries Sciences University, Mangalore, 575 002, India
| | - Malathi Shekar
- Department of Fisheries Microbiology, College of Fisheries, Karnataka Veterinary, Animal and Fisheries Sciences University, Mangalore, 575 002, India.
| | - Moleyur Nagarajappa Venugopal
- Department of Fisheries Microbiology, College of Fisheries, Karnataka Veterinary, Animal and Fisheries Sciences University, Mangalore, 575 002, India
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Tang X, Wang H, Liu F, Sheng X, Xing J, Zhan W. Outer membrane protein A: An immunogenic protein induces highly protective efficacy against Vibrio ichthyoenteri. Microb Pathog 2017; 113:152-159. [PMID: 29074429 DOI: 10.1016/j.micpath.2017.10.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 09/21/2017] [Accepted: 10/20/2017] [Indexed: 11/30/2022]
Abstract
Vibrio ichthyoenteri was an important causative agent of bacterial enteritis in flounder (Paralichthys olivaceus). Outer membrane protein A (OmpA) of Gram-negative pathogen was a major cell surface antigen. In the present study, OmpA of V. ichthyoenteri was recombinantly expressed in Escherichia coli, and the immunogenicity of OmpA was identified by western blotting using flounder anti-rOmpA and anti-V. ichthyoenteri antibodies. The vaccine potential of rOmpA was tested in a flounder model, and a high relative percentage of survival rate was obtained with 73.1% after challenge with V. ichthyoenteri. Meanwhile, the immune response of flounder induced by rOmpA was also investigated, and the results showed that the sIg + lymphocytes in blood, spleen, and pronephros significantly proliferated, and the peak levels occurred at week 4 after immunization. Moreover, rOmpA could induce higher levels of specific serum antibodies than the control group after immunization, and the peak level occurred at week 5 after immunization. Meanwhile, qRT-PCR analysis showed that the expressions of CD4-1, CD8α, IL-1β, IFN-γ, MHCIα and MHCIIα genes were significantly up-regulated after immunization with rOmpA. Taking together, these results demonstrated that rOmpA could evoke highly protective effects against V. ichthyoenteri challenge and induce strong immune response of flounder, which indicated that OmpA was a promising vaccine candidate.
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Affiliation(s)
- Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No.1 Wenhai Road, Qingdao 266071, China
| | - Hongye Wang
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Fuguo Liu
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, KLMME, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No.1 Wenhai Road, Qingdao 266071, China.
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Beck BR, Lee SH, Kim D, Park JH, Lee HK, Kwon SS, Lee KH, Lee JI, Song SK. A Lactococcus lactis BFE920 feed vaccine expressing a fusion protein composed of the OmpA and FlgD antigens from Edwardsiella tarda was significantly better at protecting olive flounder (Paralichthys olivaceus) from edwardsiellosis than single antigen vaccines. FISH & SHELLFISH IMMUNOLOGY 2017; 68:19-28. [PMID: 28687358 DOI: 10.1016/j.fsi.2017.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/24/2017] [Accepted: 07/01/2017] [Indexed: 06/07/2023]
Abstract
Edwardsiellosis is a major fish disease that causes a significant economic damage in the aquaculture industry. Here, we assessed vaccine efficacy after feeding oral vaccines to olive flounder (Paralichthys olivaceus), either L. lactis BFE920 expressing Edwardsiella tarda outer membrane protein A (OmpA), flagellar hook protein D (FlgD), or a fusion antigen of the two. Feed vaccination was done twice with a one-week interval. Fish were fed regular feed adsorbed with the vaccines. Feed vaccination was given over the course of one week to maximize the interaction between the feed vaccines and the fish intestine. Flounder fed the vaccine containing the fusion antigen had significantly elevated levels T cell genes (CD4-1, CD4-2, and CD8α), type 1 helper T cell (Th1) subset indicator genes (T-bet and IFN-γ), and antigen-specific antibodies compared to the groups fed the single antigen-expressing vaccines. Furthermore, the superiority of the fusion vaccine was also observed in survival rates when fish were challenged with E. tarda: OmpA-FlgD-expressing vaccine (82.5% survival); FlgD-vaccine (55.0%); OmpA-vaccine (50%); WT L. lactis BFE920 (37.5%); Ctrl (10%). In addition, vaccine-fed fish exhibited increased weight gain (∼20%) and a decreased feed conversion ratio (∼20%) during the four week vaccination period. Flounder fed the FlgD-expressing vaccine, either the single or the fusion form, had significantly increased expression of TLR5M, IL-1β, and IL-12p40, suggesting that the FlgD may be a ligand of olive flounder TLR5M receptor or closely related to the TLR5M pathway. In conclusion, the present study demonstrated that olive flounder fed L. lactis BFE920 expressing a fusion antigen composed of E. tarda OmpA and FlgD showed a strong protective effect against edwardsiellosis indicating this may be developed as an E. tarda feed vaccine.
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Affiliation(s)
- Bo Ram Beck
- Research Center, Immunus Co., Ltd., Business Incubation Center 205, Handong University, Pohang 37554, Republic of Korea
| | - Soon Ho Lee
- School of Life Science, Handong University, Pohang 37554, Republic of Korea
| | - Daniel Kim
- School of Life Science, Handong University, Pohang 37554, Republic of Korea
| | - Ji Hye Park
- Research Center, Immunus Co., Ltd., Business Incubation Center 205, Handong University, Pohang 37554, Republic of Korea
| | - Hyun Kyung Lee
- School of Life Science, Handong University, Pohang 37554, Republic of Korea
| | - San-Sung Kwon
- School of Life Science, Handong University, Pohang 37554, Republic of Korea
| | - Kwan Hee Lee
- Research Center, Immunus Co., Ltd., Business Incubation Center 205, Handong University, Pohang 37554, Republic of Korea
| | - Jae Il Lee
- GyeongSangbuk-Do Fisheries Technology Center, Yeongdeok 36426, Republic of Korea
| | - Seong Kyu Song
- Research Center, Immunus Co., Ltd., Business Incubation Center 205, Handong University, Pohang 37554, Republic of Korea; School of Life Science, Handong University, Pohang 37554, Republic of Korea.
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Banu H, Anand D, Bedekar MK, Rajendran KV, Makesh M. Monoclonal antibodies against recombinant GAPDH of Edwardsiella tarda reveal the conserved nature of the protein. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1309642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Husne Banu
- ICAR – Central Institute of Fisheries Education, Mumbai, India
| | - Deepika Anand
- ICAR – Central Institute of Fisheries Education, Mumbai, India
| | - Megha K Bedekar
- ICAR – Central Institute of Fisheries Education, Mumbai, India
| | - K. V Rajendran
- ICAR – Central Institute of Fisheries Education, Mumbai, India
| | - M. Makesh
- ICAR – Central Institute of Fisheries Education, Mumbai, India
- ICAR – Central Institute of Brackishwater Aquaculture, Chennai, India
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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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Liu F, Tang X, Sheng X, Xing J, Zhan W. Comparative study of the vaccine potential of six outer membrane proteins of Edwardsiella tarda and the immune responses of flounder ( Paralichthys olivaceus ) after vaccination. Vet Immunol Immunopathol 2017; 185:38-47. [DOI: 10.1016/j.vetimm.2017.01.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 01/18/2017] [Accepted: 01/26/2017] [Indexed: 01/10/2023]
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An Overview of Vaccination Strategies and Antigen Delivery Systems for Streptococcus agalactiae Vaccines in Nile Tilapia (Oreochromis niloticus). Vaccines (Basel) 2016; 4:vaccines4040048. [PMID: 27983591 PMCID: PMC5192368 DOI: 10.3390/vaccines4040048] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/06/2016] [Accepted: 12/08/2016] [Indexed: 12/12/2022] Open
Abstract
Streptococcus agalactiae is an emerging infectious disease adversely affecting Nile tilapia (Niloticus oreochromis) production in aquaculture. Research carried out in the last decade has focused on developing protective vaccines using different strategies, although no review has been carried out to evaluate the efficacy of these strategies. The purpose of this review is to provide a synopsis of vaccination strategies and antigen delivery systems currently used for S. agalactiae vaccines in tilapia. Furthermore, as shown herein, current vaccine designs include the use of replicative antigen delivery systems, such as attenuated virulent strains, heterologous vectors and DNA vaccines, while non-replicative vaccines include the inactivated whole cell (IWC) and subunit vaccines encoding different S. agalactiae immunogenic proteins. Intraperitoneal vaccination is the most widely used immunization strategy, although immersion, spray and oral vaccines have also been tried with variable success. Vaccine efficacy is mostly evaluated by use of the intraperitoneal challenge model aimed at evaluating the relative percent survival (RPS) of vaccinated fish. The major limitation with this approach is that it lacks the ability to elucidate the mechanism of vaccine protection at portals of bacterial entry in mucosal organs and prevention of pathology in target organs. Despite this, indications are that the correlates of vaccine protection can be established based on antibody responses and antigen dose, although these parameters require optimization before they can become an integral part of routine vaccine production. Nevertheless, this review shows that different approaches can be used to produce protective vaccines against S. agalactiae in tilapia although there is a need to optimize the measures of vaccine efficacy.
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Liu X, Xu J, Zhang H, Liu Q, Xiao J, Zhang Y. Design and evaluation of an Edwardsiella tarda DNA vaccine co-encoding antigenic and adjuvant peptide. FISH & SHELLFISH IMMUNOLOGY 2016; 59:189-195. [PMID: 27765700 DOI: 10.1016/j.fsi.2016.10.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 10/01/2016] [Accepted: 10/15/2016] [Indexed: 06/06/2023]
Abstract
Edwardsiella tarda is associated with edwardsiellosis in cultured fish, resulting in heavy losses in aquaculture. So far, different types of vaccine have been attempted against E. tarda. In this study, an optimized eukaryotic expression plasmid was developed and an optimized DNA vaccine co-encoding antigenic and adjuvant peptide using a bicistronic expression system was designed. As a result, a modified plasmid harbored cytomegalovirus (CMV) promoter attached with R region of long terminal repeat from human T-cell leukemia virus type 1 (CMV/R) and woodchuck hepatitis virus post-transcriptional response element (WPRE) component showed an increased antigenic gene expression compared with unmodified plasmid. Moreover, the designed system based on bicistronic system exhibited a stronger ability to express antigenic gene and the RPS achieved 87.3% compared with plasmid encoding antigentic gene. Finally, immunological analysis showed that the DNA vaccine induced both innate and adaptive immune responses. These results suggest that co-encoding antigenic and adjuvant proteins might be an efficient strategy to develop DNA vaccines in aquaculture in the future.
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Affiliation(s)
- Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Jinmei Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China
| | - Hua Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Qin Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
| | - Jingfan Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China.
| | - Yuanxing Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, PR China; Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, PR China
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Dubey S, Avadhani K, Mutalik S, Sivadasan SM, Maiti B, Girisha SK, Venugopal MN, Mutoloki S, Evensen Ø, Karunasagar I, Munang’andu HM. Edwardsiella tarda OmpA Encapsulated in Chitosan Nanoparticles Shows Superior Protection over Inactivated Whole Cell Vaccine in Orally Vaccinated Fringed-Lipped Peninsula Carp (Labeo fimbriatus). Vaccines (Basel) 2016; 4:vaccines4040040. [PMID: 27827990 PMCID: PMC5192360 DOI: 10.3390/vaccines4040040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/21/2016] [Accepted: 10/28/2016] [Indexed: 12/13/2022] Open
Abstract
The use of oral vaccination in finfish has lagged behind injectable vaccines for a long time as oral vaccines fall short of injection vaccines in conferring protective immunity. Biodegradable polymeric nanoparticles (NPs) have shown potential to serve as antigen delivery systems for oral vaccines. In this study the recombinant outer membrane protein A (rOmpA) of Edwardsiella tarda was encapsulated in chitosan NPs (NP-rOmpA) and used for oral vaccination of Labeo fimbriatus. The rOmpA purity was 85%, nanodiameter <500 nm, encapsulation efficiency 60.6%, zeta potential +19.05 mV, and there was an in vitro release of 49% of encapsulated antigen within 48 h post incubation in phosphate-buffered saline. Empty NPs and a non-formulated, inactivated whole cell E. tarda (IWC-ET) vaccine were used as controls. Post-vaccination antibody levels were significantly (p = 0.0458) higher in the NP-rOmpA vaccinated fish (Mean OD450 = 2.430) than in fish vaccinated with inactivated whole cell E. tarda (IWC-ET) vaccine (Mean OD450 = 1.735), which corresponded with post-challenge survival proportions (PCSP) of 73.3% and 48.28% for the NP-rOmpA and IWC-ET groups, respectively. Serum samples from NP-rOmpA-vaccinated fish had a higher inhibition rate for E. tarda growth on tryptic soy agar (TSA) than the IWC-ET group. There was no significant difference (p = 0.989) in PCSPs between fish vaccinated with empty NPs and the unvaccinated control fish, while serum from both groups showed no detectable antibodies against E. tarda. Overall, these data show that the NP-rOmpA vaccine produced higher antibody levels and had superior protection over the IWC-ET vaccine, showing that encapsulating OmpA in chitosan NPs confer improved protection against E. tarda mortality in L. fimbriatus. There is a need to elucidate the possible adjuvant effects of chitosan NPs and the immunological mechanisms of protective immunity induced by OMPs administered orally to fish.
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Affiliation(s)
- Saurabh Dubey
- Department of Fisheries Microbiology, Karnataka Veterinary, Animal & Fisheries Sciences University, College of Fisheries, Mangalore 575002, India.
- Norwegian University of Life Sciences, Faculty of Veterinary Medicine, Department of Basic Sciences and Aquatic Medicine, Section of Aquatic Medicine and Nutrition, Adamstuen Campus, Ullevålseveien 72, P.O. Box 8146, NO-0033 Dep, Oslo 0454, Norway.
| | - Kiran Avadhani
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal 576104, Karnataka State, India.
| | - Srinivas Mutalik
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal University, Manipal 576104, Karnataka State, India.
| | - Sangeetha Madambithara Sivadasan
- Department of Fisheries Microbiology, Karnataka Veterinary, Animal & Fisheries Sciences University, College of Fisheries, Mangalore 575002, India.
| | - Biswajit Maiti
- UNESCO MIRCEN for Marine Biotechnology, Nitte University Centre for Science Education and Research, Paneer Campus, Deralakatte, Mangalore 575018, India.
| | - Shivani Kallappa Girisha
- Department of Fisheries Microbiology, Karnataka Veterinary, Animal & Fisheries Sciences University, College of Fisheries, Mangalore 575002, India.
| | - Moleyur Nagarajappa Venugopal
- Department of Fisheries Microbiology, Karnataka Veterinary, Animal & Fisheries Sciences University, College of Fisheries, Mangalore 575002, India.
| | - Stephen Mutoloki
- Norwegian University of Life Sciences, Faculty of Veterinary Medicine, Department of Basic Sciences and Aquatic Medicine, Section of Aquatic Medicine and Nutrition, Adamstuen Campus, Ullevålseveien 72, P.O. Box 8146, NO-0033 Dep, Oslo 0454, Norway.
| | - Øystein Evensen
- Norwegian University of Life Sciences, Faculty of Veterinary Medicine, Department of Basic Sciences and Aquatic Medicine, Section of Aquatic Medicine and Nutrition, Adamstuen Campus, Ullevålseveien 72, P.O. Box 8146, NO-0033 Dep, Oslo 0454, Norway.
| | - Indrani Karunasagar
- UNESCO MIRCEN for Marine Biotechnology, Nitte University Centre for Science Education and Research, Paneer Campus, Deralakatte, Mangalore 575018, India.
| | - Hetron Mweemba Munang’andu
- Norwegian University of Life Sciences, Faculty of Veterinary Medicine, Department of Basic Sciences and Aquatic Medicine, Section of Aquatic Medicine and Nutrition, Adamstuen Campus, Ullevålseveien 72, P.O. Box 8146, NO-0033 Dep, Oslo 0454, Norway.
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Wang X, Peng L, Wang K, Wang J, He Y, Wang E, Chen D, Ouyang P, Geng Y, Huang X. The outer membrane proteins of Stenotrophomonas maltophilia are potential vaccine candidates for channel catfish (Ictalurus punctatus). FISH & SHELLFISH IMMUNOLOGY 2016; 57:318-324. [PMID: 27574827 DOI: 10.1016/j.fsi.2016.08.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 08/22/2016] [Accepted: 08/25/2016] [Indexed: 06/06/2023]
Abstract
Channel catfish (Ictalurus punctatus) is an important agricultural fish that has been plagued by Stenotrophomonas maltophilia (S. maltophilia) infections in recent years, some of them severe. The outer membrane proteins (OMPs) of S. maltophilia are one of the most immunogenic and highly conserved candidates for vaccine development in aquaculture. The present study investigated OMPs of S. maltophilia as vaccine on immune response and disease resistance against S. maltophilia of channel catfish and investigated the enhancement effect of natural adjuvants Propolis (Pro), FIG polysaccharide (Fcps), Glycyrrhizine (Gly) to OMPs of S. maltophilia for further study. The results indicated that channel catfish injected intraperitoneally with OMPs showed better immune response including leukocytes phagocytosis activity, serum bactericidal activity, complement C3, IgM level and an increasement of resistance against S. maltophilia compared to the control group. Moreover, Pro, Fcps and Gly could enhance the immune response of OMPs. The relative percent of survival (RPS) was 73.33%, 66.67%, 63.33%, 60%, 0% in fish injected OMPs + Pro, OMPs + Fcps, OMPs + Gly, OMPs and 0.65% normal saline, respectively. These results suggested that OMPs used as vaccine could induce and stimulate immune response and enhance disease resistance in channel catfish, especially for Pro as immunoenhancer. Results revealed that OMPs were an effective vaccine against S. maltophilia in channel catfish.
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Affiliation(s)
- Xingli Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Lang Peng
- Department of Aquaculture, Sichuan Province Bureau of Aquatic Products, Chenghua District Donghong Road No. 60, Chengdu 610072, China
| | - Kaiyu Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China.
| | - Jun Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Yang He
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Erlong Wang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Defang Chen
- Department of Aquaculture, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Ping Ouyang
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Yi Geng
- Department of Basic Veterinary, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
| | - Xiaoli Huang
- Department of Aquaculture, Sichuan Agricultural University, Wenjiang District Huimin Road No. 211, Chengdu 611130, China
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Chen Q, Tao T, Bie X, Lu F, Li Y, Lu Z. Characterization of a single-chain variable fragment specific to Cronobacter spp. from hybridoma based on outer membrane protein A. J Microbiol Methods 2016; 129:136-143. [DOI: 10.1016/j.mimet.2016.08.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 07/23/2016] [Accepted: 08/02/2016] [Indexed: 12/30/2022]
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Yang Q, Pan YL, Wang KY, Wang J, He Y, Wang EL, Liu T, Yi Geng, Chen DF, Huang XL. OmpN, outer membrane proteins of Edwardsiella ictaluri are potential vaccine candidates for channel catfish (Ictalurus punctatus). Mol Immunol 2016; 78:1-8. [DOI: 10.1016/j.molimm.2016.08.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/13/2016] [Accepted: 08/17/2016] [Indexed: 12/26/2022]
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43
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In silico identification of receptor specific epitopes as potential vaccine candidates from Vibrio cholerae strains. GENE REPORTS 2016. [DOI: 10.1016/j.genrep.2016.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Edwardsiella tarda Outer Membrane Protein C: An Immunogenic Protein Induces Highly Protective Effects in Flounder (Paralichthys olivaceus) against Edwardsiellosis. Int J Mol Sci 2016; 17:ijms17071117. [PMID: 27420049 PMCID: PMC4964492 DOI: 10.3390/ijms17071117] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 07/03/2016] [Accepted: 07/07/2016] [Indexed: 11/28/2022] Open
Abstract
Outer membrane protein C of Edwardsiella tarda is a major cell surface antigen and it was identified to be an immunogenic protein by Western blot using flounder (Paralichthys olivaceus) anti-recombinant OmpC (rOmpC), and anti-E. tarda antibodies. rOmpC tested the immune protective effect against E. tarda challenge in a flounder model and produced a relative percentage of survival rate of 85%. The immune response of flounder induced by rOmpC was investigated, and the results showed that: (1) the levels of specific serum antibodies induced by rOmpC were significantly higher than the control group after the second week after immunization, and the peak level occurred at week five after immunization; (2) rOmpC could induce the proliferation of sIg+ lymphocytes, and the peak levels of sIg+ lymphocytes in blood, spleen, and pronephros occurred at 4–5 weeks after immunization; and (3) the MHCIIα, CD4-1, IL-1β, IL-6 and TNF-α genes were significantly induced after being injected with rOmpC. Taken together, these results demonstrated that rOmpC could evoke highly protective effects against E. tarda challenge and induce strong innate immune response and humoral immune response of flounder, which indicated that OmpC was a promising vaccine candidate against E. tarda infection.
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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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Du Y, Tang X, Sheng X, Xing J, Zhan W. Immune response of flounder (Paralichthys olivaceus) was associated with the concentration of inactivated Edwardsiella tarda and immersion time. Vet Immunol Immunopathol 2015; 167:44-50. [DOI: 10.1016/j.vetimm.2015.07.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Revised: 06/28/2015] [Accepted: 07/02/2015] [Indexed: 10/23/2022]
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Wang X, Guan Q, Wang X, Teng D, Mao R, Yao J, Wang J. Paving the way to construct a new vaccine against Escherichia coli from its recombinant outer membrane protein C via a murine model. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Richards SA, Stutzer C, Bosman AM, Maritz-Olivier C. Transmembrane proteins--Mining the cattle tick transcriptome. Ticks Tick Borne Dis 2015; 6:695-710. [PMID: 26096851 DOI: 10.1016/j.ttbdis.2015.06.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 05/12/2015] [Accepted: 06/08/2015] [Indexed: 11/28/2022]
Abstract
Managing the spread and load of pathogen-transmitting ticks is an important task worldwide. The cattle tick, Rhipicephalus microplus, not only impacts the economy through losses in dairy and meat production, but also raises concerns for human health in regards to the potential of certain transmitted pathogens becoming zoonotic. However, novel strategies to control R. microplus are hindered by lack of understanding tick biology and the discovery of suitable vaccine or acaricide targets. The importance of transmembrane proteins as vaccine targets are well known, as is the case in tick vaccines with Bm86 as antigen. In this study, we describe the localization and functional annotation of 878 putative transmembrane proteins. Thirty proteins could be confirmed in the R. microplus gut using LC-MS/MS analysis and their roles in tick biology are discussed. To the best of our knowledge, 19 targets have not been reported before in any proteomics study in various tick species and the possibility of using the identified proteins as targets for tick control are discussed. Although tissue expression of identified putative proteins through expansive proteomics is necessary, this study demonstrates the possibility of using bioinformatics for the identification of targets for further evaluation in tick control strategies.
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Affiliation(s)
- Sabine A Richards
- Department of Genetics, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa
| | - Christian Stutzer
- Department of Genetics, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa
| | - Anna-Mari Bosman
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, South Africa
| | - Christine Maritz-Olivier
- Department of Genetics, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa.
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Recombinant outer membrane protein A induces a protective immune response against Escherichia coli infection in mice. Appl Microbiol Biotechnol 2015; 99:5451-60. [PMID: 25567514 DOI: 10.1007/s00253-014-6339-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 12/12/2014] [Accepted: 12/17/2014] [Indexed: 01/19/2023]
Abstract
Pathogenic Escherichia coli (E. coli) is an important infectious Gram-negative bacterium causing millions of death every year. Outer membrane protein A (OmpA) has been suggested as a potential vaccine candidate for conferring protection against bacterial infection. In this study, a universal vaccine candidate for E. coli infection was developed and evaluated. Bioinformatics analysis revealed the OmpA protein from E. coli shares 96~100%, 90~94%, and 45% identity with Shigella, Salmonella, and Pseudomonas strains, respectively. The ompA gene was cloned from the genomic DNA of E. coli, and then the OmpA protein was expressed in BL21 (DE3) using the auto-induction method. The recombinant OmpA (rOmpA) protein had an average molecular weight of 36 kDa with the purity of 93.5%. Immunological analysis indicated that the titers of anti-rOmpA sera against rOmpA and whole cells were 1:642,000 and 1:140,000, respectively. Moreover, rOmpA not only conferred a high level of immunogenicity to protect mice against the challenge of E. coli, but also generated cross-protection against Shigella and Salmonella. The anti-rOmpA sera could enhance the phagocytic activity of neutrophils against E. coli. The survive ratios of mice immunized with rOmpA and PBS were 50% and 20% after 48 h post-challenge, indicating mice were protected from E. coli infection after immunization with rOmpA. All these results clearly indicate that rOmpA may be a promising candidate for the development of a subunit vaccine to prevent E. coli infection.
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