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Zhang L, Li Z, Li Y, Tian J, Jia K, Zhang D, Song M, Abbas Raza SH, Garcia M, Kang Y, Zheng W, Qian A, Shan X, Xu Y. OmpW expressed by recombinant Lactobacillus casei elicits protective immunity against Aeromonas veronii in common carp. Microb Pathog 2019; 133:103552. [PMID: 31121269 DOI: 10.1016/j.micpath.2019.103552] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/16/2019] [Accepted: 05/19/2019] [Indexed: 12/22/2022]
Abstract
Aeromonas veronii is an opportunistic pathogen that is capable of infecting both aquatic livestock and mammals. Natural infection in fishes results in irreparable damage to the aquaculture industry. In this study, we sought to investigate whether recombinant Lactobacillus casei expressing the outer membrane protein W (OmpW) of A.veronii could elicit protective immunity against A.veronii infections. We generated two recombinant Lactobacillus casei (L.casei) strains expressing the OmpW of A.veronii (surface-displayed or secreted) and evaluated the effect on immune responses in a fish model. A 600-bp gene fragment was subcloned into the L.casei expression plasmids pPG-1 (surface-displayed) and pPG-2 (secreted). Expression of the recombinant OmpW protein was also confirmed by Western blot and immunofluorescence assays. Common carp immunized with Lc-pPG-1- OmpW and Lc-pPG-2- OmpW via oral administration elicited high serum specific antibody titers and high LZM, ACP, and SOD activities. High levels of the IL-10, IL-β, IFN-γ, and TNF-α genes in different organs indicated that the inflammatory response and cell immune response were triggered. Additionally, when immunized fish were challenged with A.veronii, Lc-pPG1-OmpW and Lc-pPG2-OmpW demonstrated 40% and 50% protective efficacy. These data indicate that the combination of OmpW delivery and the lactic acid bacteria (LAB) approach may be a promising mucosal therapeutic strategy for treatment of A.veronii.
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Affiliation(s)
- Lei Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Zhenxing Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Ying Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Jiaxin Tian
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Kaixiang Jia
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Dongxing Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Mingfang Song
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Sayed Haidar Abbas Raza
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shanxi, 712100, PR China
| | - Matthew Garcia
- Utah State University, School of Animal Dairy and Veterinary Sciences, Logan Utah USA, 84322, USA
| | - Yuanhuan Kang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Wei Zheng
- Jilin Province Fisheries Research Institute, Changchun, 130000, China
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, China.
| | - Yang Xu
- Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Freshwater Aquaculture Genetic and Breeding of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, 313001, China.
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Tran F, Boedicker JQ. Genetic cargo and bacterial species set the rate of vesicle-mediated horizontal gene transfer. Sci Rep 2017; 7:8813. [PMID: 28821711 PMCID: PMC5562762 DOI: 10.1038/s41598-017-07447-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/27/2017] [Indexed: 12/22/2022] Open
Abstract
Most bacteria release extracellular vesicles (EVs). Recent studies have found these vesicles are capable of gene delivery, however the consequences of vesicle-mediated transfer on the patterns and rates of gene flow within microbial communities remains unclear. Previous studies have not determined the impact of both the genetic cargo and the donor and recipient species on the rate of vesicle-mediated gene exchange. This report examines the potential for EVs as a mechanism of gene transfer within heterogeneous microbial populations. EVs were harvested from three species of Gram-negative microbes carrying different plasmids. The dynamics of gene transfer into recipient species was measured. This study demonstrates that vesicles enable gene exchange between five species of Gram-negative bacteria, and that the identity of the genetic cargo, donor strain, and recipient strain all influence gene transfer rates. Each species released and acquired vesicles containing genetic material to a variable degree, and the transfer rate did not correlate with the relatedness of the donor and recipient species. The results suggest that EVs may be a general mechanism to exchange non-specialized genetic cargo between bacterial species.
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Affiliation(s)
- Frances Tran
- University of Southern California, Department of Biological Sciences, Seaver Science Center (SSC) 212, 920 Bloom Walk, Los Angeles, CA, 90089, USA
| | - James Q Boedicker
- University of Southern California, Department of Biological Sciences, Seaver Science Center (SSC) 212, 920 Bloom Walk, Los Angeles, CA, 90089, USA.
- University of Southern California, Department of Physics and Astronomy, Seaver Science Center (SSC) 212, 920 Bloom Walk, Los Angeles, CA, 90089, USA.
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Guan R, Xiong J, Huang W, Guo S. Enhancement of protective immunity in European eel (Anguilla anguilla) against Aeromonas hydrophila and Aeromonas sobria by a recombinant Aeromonas outer membrane protein. Acta Biochim Biophys Sin (Shanghai) 2011; 43:79-88. [PMID: 21148192 DOI: 10.1093/abbs/gmq115] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
To develop a vaccine, which can simultaneously prevent the diseases caused by various pathogenic bacteria in fish, we try to find a conserved outer membrane protein (OMP) antigen from different bacterial pathogens. In this study, an OMP fragment of 747 bp (named as Omp-G), which was highly conserved in seven Aeromonas OMP sequences from the NCBI database, was amplified by PCR from one Aeromonas sobria strain (B10) and two Aeromonas hydrophila strains (B27 and B33) with the designed specific primers. The sequence was cloned into pGEX-2T (6 × His-tag) vector, expressed in Escherichia coli system, and then the recombinant protein (named as rOmp-G) was purified with nickel chelating affinity chromatography. The purified rOmp-G showed a good immunogenicity in rabbits and well-conserved characteristics in these three pathogens by enzyme-linked immunosorbed assay. Furthermore, the rOmp-G also showed good immunogenicity in eels (Anguilla anguilla) for eliciting significantly increased specific antibodies (P < 0.01), and providing higher protection efficiencies (P < 0.05) after the pathogens challenge. The values of the relative percent survival in eels were 70% and 50% for two A. hydrophila strain challenge, and 75% for A. sobria strain challenge. This is the first report of a potential vaccination in eels that simultaneously provide protectiveness against different Aeromonas pathogens with a conserved partial OMP.
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Affiliation(s)
- Ruizhang Guan
- Institute of Hydrobiology, Chinese Academy of Science, Wuhan, China.
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Ni XD, Wang N, Liu YJ, Lu CP. Immunoproteomics of extracellular proteins of theAeromonas hydrophilaChina vaccine strain J-1 reveal a highly immunoreactive outer membrane protein. ACTA ACUST UNITED AC 2010; 58:363-73. [DOI: 10.1111/j.1574-695x.2009.00646.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Maiti B, Raghunath P, Karunasagar I, Karunasagar I. Typing of clinical and environmental strains of Aeromonas spp. using two PCR based methods and whole cell protein analysis. J Microbiol Methods 2009; 78:312-8. [DOI: 10.1016/j.mimet.2009.07.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 07/01/2009] [Accepted: 07/06/2009] [Indexed: 10/20/2022]
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