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Guan LJ, Song JJ, Xue Y, Ai X, Liu ZJ, Si LF, Li MY, Zhao ZQ. Immune Protective Efficacy of China's Traditional Inactivated and Attenuated Vaccines against the Prevalent Strains of Pasteurella multocida in Mice. Vaccines (Basel) 2021; 9:vaccines9101155. [PMID: 34696263 PMCID: PMC8537324 DOI: 10.3390/vaccines9101155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 09/28/2021] [Accepted: 09/28/2021] [Indexed: 11/24/2022] Open
Abstract
Capsular type A and D strains of Pasteurella multocida are the main epidemic serogroups in pigs in China. In this study, we preliminarily evaluated the immune protective efficacy of the two traditional vaccines, an inactivated C44-1 aluminum-hydroxide-gel-adjuvanted (Alh–C44-1) vaccine and a live EO630 vaccine, against currently circulating strains of P. multocida in a mouse model. Mice immunized twice with conventional vaccines generated higher antibody titers, and significantly higher levels of IgG were observed in the mice inoculated with the inactivated Alh–C44-1 vaccine on day 35 (p < 0.05) than those with the live EO630 vaccine. The mice immune protection test showed that the vaccination groups had a 57% or 71% protection effect against the serogroup B strain, but had no protective effect against epidemic strains. In conclusion, our study found that the widely used traditional P. multocida vaccines in China provide good protection against homologous strains, but could not provide cross-protection against heterologous strains in a mouse model.
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Affiliation(s)
- Li-Jun Guan
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Ji-Jian Song
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Yun Xue
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Xia Ai
- Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry, College of Animal Science and Veterinary Medicine, Tianjin Agricultural University, Tianjin 300384, China;
| | - Zhi-Jun Liu
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Li-Fang Si
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Meng-Yun Li
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
| | - Zhan-Qin Zhao
- Laboratory of Veterinary Biologics Engineering, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China; (L.-J.G.); (J.-J.S.); (Y.X.); (Z.-J.L.); (L.-F.S.); (M.-Y.L.)
- Key-Disciplines Lab of Safety of Environment and Animal Product, College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471023, China
- Correspondence: ; Tel.: +86-150-3633-5032
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Yassein AAM, Teleb AA, Hassan GM, El Fiky ZA. The immune response and protective efficacy of a potential DNA vaccine against virulent Pasteurella multocida. J Genet Eng Biotechnol 2021; 19:81. [PMID: 34057640 PMCID: PMC8167001 DOI: 10.1186/s43141-021-00180-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 05/14/2021] [Indexed: 12/22/2022]
Abstract
Background Pasteurella multocida is the main cause of several infections of farm animals, and the immunity gained from commercial vaccines is for the short term only and needs to be routinely administered, so work on new vaccines against virulent P. multocida is crucial. Results In this study, the OmpH gene was amplified from ten P. multocida strains, and the PCR products were sequenced and analyzed. The results of RFLP analysis of OmpH gene digested by MspI enzyme showed that all of ten strains examined possessed one restriction site and two fragments, 350 and 650 bp. The OmpH sequence of strain No. 10 was cloned into bacterial expression vector pUCP24, and the recombinant pUCP24-OmpH was expressed in E. coli DH5α. Serum samples obtained from the ELISA test from a group of vaccinated rats indicate that the antibodies were present at high titer in immunized rats and can be tested as a vaccine candidate with a challenge. Conclusions In rats infected with the DNA vaccine and inactivated vaccine, a significant increase in serum antibody levels was observed. In addition, the DNA vaccine provided the vaccinated rats with partial protection; however, the protective efficacy was greater than that offered by the live attenuated vaccine. This successful recombinant vaccine is immunogenic and may potentially be used as a vaccine in the future.
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Affiliation(s)
- Ahmed A M Yassein
- Genetics Department, Faculty of Agriculture, Fayoum University, 63514, Fayoum, Egypt.
| | - Ayaat A Teleb
- Genetics Department, Faculty of Agriculture, Fayoum University, 63514, Fayoum, Egypt
| | - Gamal M Hassan
- Genetics Department, Faculty of Agriculture, Fayoum University, 63514, Fayoum, Egypt
| | - Zaki A El Fiky
- Genetics Department, Faculty of Agriculture, Fayoum University, 63514, Fayoum, Egypt
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Gong Q, Peng YG, Niu MF, Qin CL. Research Note: The immune enhancement ability of inulin on ptfA gene DNA vaccine of avian Pasteurella multocida. Poult Sci 2020; 99:3015-3019. [PMID: 32475437 PMCID: PMC7597738 DOI: 10.1016/j.psj.2020.03.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 02/27/2020] [Indexed: 11/24/2022] Open
Abstract
To evaluate the ability of inulin to enhance the immune response of a ptfA gene DNA vaccine for avian Pasteurella multocida, inulin was added as an adjuvant to the ptfA-DNA vaccine, obtaining an inulin-adjuvant DNA vaccine. The DNA vaccine was administered to chickens; a fimbria protein vaccine and an attenuated live vaccine were used as positive controls. The levels of the serum antibody and concentrations of interferon-γ (IFN-γ), interleukin-2 (IL-2), and interleukin-4 (IL-4) were determined, and a lymphocyte proliferation assay was performed. After being challenged with virulent P. multocida, the protective efficacy was evaluated. The results showed that the serum antibodies induced by the ptfA-DNA vaccine were not enhanced by inulin. The stimulation index values and the concentrations of IL-2 and IFN-γ in chickens vaccinated with inulin-adjuvant DNA vaccine were significantly higher than those in chickens vaccinated with the DNA vaccine, those with the fimbria protein vaccine, and the chickens gavaged with inulin. The concentrations of IL-4 in the inulin-adjuvant DNA vaccine group and the fimbria protein vaccine group were higher than those in the DNA vaccine group and the inulin-gavage group. The protective efficacy rates of the attenuated live vaccine group, the fimbria protein vaccine group, the DNA vaccine group, the inulin-adjuvant DNA vaccine group, and the inulin-gavage group were 90, 70, 55, 65, and 55%, respectively.
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Affiliation(s)
- Q Gong
- Henan University of Science and Technology, Luoyang 471023, P.R. China.
| | - Y G Peng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research, Institute Chinese Academy of Agricultural Sciences, Harbin 150069, P.R. China
| | - M F Niu
- Henan University of Science and Technology, Luoyang 471023, P.R. China
| | - C L Qin
- Henan University of Science and Technology, Luoyang 471023, P.R. China
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Evaluation of carbopol as an adjuvant on the effectiveness of progressive atrophic rhinitis vaccine. Vaccine 2018; 36:4477-4484. [DOI: 10.1016/j.vaccine.2018.06.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 06/07/2018] [Accepted: 06/09/2018] [Indexed: 12/23/2022]
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6
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Gong Q, Kong LY, Niu MF, Qin CL, Yang Y, Li X, Ruan MD, Tian Y, Li ZL. Construction of a ptfA chitosan nanoparticle DNA vaccine against Pasteurella multocida and the immune response in chickens. Vet J 2017; 231:1-7. [PMID: 29429481 DOI: 10.1016/j.tvjl.2017.11.006] [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: 04/20/2017] [Revised: 11/13/2017] [Accepted: 11/17/2017] [Indexed: 01/08/2023]
Abstract
The aim of this study was to evaluate the effect of chitosanon the immune response induced by a DNA vaccine based on the ptfA gene of avian Pasteurella multocida. Naked DNA vaccine was packed with chitosanmolecules, resulting in a chitosannanoparticle DNA vaccine. The encapsulation efficiency, shape, size and resistance to DNA degradation were determined. The vaccine was administered to chickens and serum antibody, interferon-γ (IFN-γ), interleukin-2 (IL-2) and interleukin-4 (IL-4) concentrations were determined and lymphocyte proliferation assays were performed. After challenge with virulent avian P. multocida, protective efficacy was evaluated. The encapsulation efficiency of the chitosan nanoparticle DNA vaccine was 95.3%. The particle size was approximately 200nm and close to spherical in shape and it could effectively resist degradation by DNases. Following vaccination, serum antibodies, stimulation index (SI) value and concentrations of IFN-γ and IL-2 in chickens vaccinated with the chitosan nanoparticle DNA vaccine were significantly higher than those that were vaccinated with the naked DNA vaccine (P-values are 0.026, 0.045, 0.039 and 0.024, respectively). However, the concentrations of IL-4 in the two DNA vaccines group were no significant difference (P=0.157). The protective efficacy rate provided by naked DNA vaccine, chitosan nanoparticle DNA vaccine and the attenuated live vaccine were 56%, 68% and 88%, respectively. The results indicated that chitosan was able to enhance the immune response to a naked DNA vaccine based on the ptfA gene of P. multocida.
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Affiliation(s)
- Q Gong
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China.
| | - L Y Kong
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - M F Niu
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - C L Qin
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - Y Yang
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - X Li
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - M D Ruan
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - Y Tian
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
| | - Z L Li
- Henan University of Science and Technology, 263 Kaiyuan Road, Luoyang 471023, PR China
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Generation of an attenuated Salmonella-delivery strains expressing adhesin and toxin antigens for progressive atrophic rhinitis, and evaluation of its immune responses in a murine model. Vaccine 2014; 32:5057-64. [DOI: 10.1016/j.vaccine.2014.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 06/05/2014] [Accepted: 07/08/2014] [Indexed: 11/22/2022]
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8
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Ahmad TA, Rammah SS, Sheweita SA, Haroun M, El-Sayed LH. Development of immunization trials against Pasteurella multocida. Vaccine 2013; 32:909-17. [PMID: 24295805 DOI: 10.1016/j.vaccine.2013.11.068] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/04/2013] [Accepted: 11/18/2013] [Indexed: 11/27/2022]
Abstract
Pasteurellosis is one of the most important respiratory diseases facing economically valuable farm animals such as poultry, rabbit, cattle, goats and pigs. It causes severe economic loss due to its symptoms that range from primary local infection to fatal septicemia. Pasteurella multocida is the responsible pathogen for this contagious disease. Chemotherapeutic treatment of Pasteurella is expensive, lengthy, and ineffective due to the increasing antibiotics resistance of the bacterium, as well as its toxicity to human consumers. Though, biosecurity measures played a role in diminishing the spread of the pathogen, the immunization methods were always the most potent preventive measures. Since the early 1950s, several trials for constructing and formulating effective vaccines were followed. This up-to-date review classifies and documents such trials. A section is devoted to discussing each group benefits and defects.
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Affiliation(s)
- Tarek A Ahmad
- Scientific Support and Projects Section, Bibliotheca Alexandrina, Alexandria, Egypt.
| | - Samar S Rammah
- Biotechnology Department, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Salah A Sheweita
- Biotechnology Department, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Medhat Haroun
- Biotechnology Department, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Laila H El-Sayed
- Immunology Department, Medical Researches Institute, Alexandria University, Alexandria, Egypt
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Abstract
In a world where most emerging and reemerging infectious diseases are zoonotic in nature and our contacts with both domestic and wild animals abound, there is growing awareness of the potential for human acquisition of animal diseases. Like other Pasteurellaceae, Pasteurella species are highly prevalent among animal populations, where they are often found as part of the normal microbiota of the oral, nasopharyngeal, and upper respiratory tracts. Many Pasteurella species are opportunistic pathogens that can cause endemic disease and are associated increasingly with epizootic outbreaks. Zoonotic transmission to humans usually occurs through animal bites or contact with nasal secretions, with P. multocida being the most prevalent isolate observed in human infections. Here we review recent comparative genomics and molecular pathogenesis studies that have advanced our understanding of the multiple virulence mechanisms employed by Pasteurella species to establish acute and chronic infections. We also summarize efforts being explored to enhance our ability to rapidly and accurately identify and distinguish among clinical isolates and to control pasteurellosis by improved development of new vaccines and treatment regimens.
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Affiliation(s)
- Brenda A Wilson
- Department of Microbiology and Host-Microbe Systems Theme of the Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.
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Gong Q, Qu N, Niu M, Qin C, Cheng M, Sun X, Zhang A. Immune responses and protective efficacy of a novel DNA vaccine encoding outer membrane protein of avian Pasteurella multocida. Vet Immunol Immunopathol 2013; 152:317-24. [PMID: 23340446 DOI: 10.1016/j.vetimm.2013.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 12/30/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
Abstract
Avian Pasteurella multocida is a causative agent of fowl cholera. Two proteins OmpH and OmpA are the major immunogenic antigens of avian P. multocida, which play an important role in inducing immune responses that confer resistance against infections. In the present study, we used pcDNA3.1(+) as a vector and constructed DNA vaccines with the genes encoding the two antigens mentioned above. These DNA vaccines include monovalent (pcDNA-OMPH, pOMPH and pcDNA-OMPA, pOMPA), divalent combination (pcDNA-OMPH+pcDNA-OMPA, pOMPH+pOMPA) and fusion of two gene vaccines (pcDNA-OMPH/OMPA, pOMPHA). The immune responses to these DNA vaccines were evaluated by serum antibody titers, lymphocyte proliferation assay and titers of a cytokines, IFN-γ. The protective efficacy after challenging with a virulent avian P. multocida strain, CVCC474, was evaluated by survival rate. A significant increase in serum antibody levels was observed in chickens vaccinated with divalent combination and fusion DNA vaccines. Additionally, the lymphocyte proliferation (SI value) and the levels of IFN-γ were both higher in chickens immunized with divalent combination and fusion DNA vaccines than in those vaccinated with monovalent DNA vaccines (P<0.05). Furthermore, the protection provided by divalent combination and fusion DNA vaccines was superior to that provided by monovalent DNA vaccines after challenging with the avian P. multocida strain CVCC474. And the protective efficacy in chickens immunized three times with the fusion DNA vaccine was equivalent to the protective efficacy in chickens vaccinated once with the attenuated live vaccine. This suggests that divalent combination and fusion DNA vaccines represent a promising approach for the prevention of fowl cholera.
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Affiliation(s)
- Qiang Gong
- He Nan University of Science and Technology, Luoyang, PR China.
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Okay S, Özcengiz E, Özcengiz G. Immune responses against chimeric DNA and protein vaccines composed of plpEN-OmpH and PlpEC-OmpH from Pasteurella multocida A:3 in mice. Acta Microbiol Immunol Hung 2012. [PMID: 23195557 DOI: 10.1556/amicr.59.2012.4.6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Pasteurella multocida is a pathogenic bacterium causing many diseases that are of significant economic importance to livestock industries. Outer membrane protein H (ompH) gene and two fragments of Pasteurella lipoprotein E (plpE) gene, namely plpEN and plpEC, were cloned from P. multocida A:3. Three DNA vaccine formulations, namely pCMV-ompH, pCMV-plpEN-ompH and pCMV-plpEC-ompH and two protein-based prototype vaccines, alum adjuvanted PlpEN-OmpH and PlpEC-OmpH, were generated. Antibody levels were induced in mice vaccinated with chimeric DNA or protein vaccines. A significant (p < 0.05) increase in serum IFN-g titer was obtained by vaccination with 100 μg of pCMV-ompH, pCMV-plpEC-ompH and PlpEC-OmpH. DNA vaccines did not provide protection upon intraperitoneal challenge with 10 LD50 of live P. multocida A:3. However, 40% protection was conferred by 100 μg of PlpEC-OmpH which was not statistically significant. These results showed that plpEN-ompH and plpEC-ompH chimeric DNA vaccines and alum adjuvanted PlpEN-OmpH or PlpEC-OmpH protein vaccines were immunogenic but not protective against P. multocida A:3 in mice. Prime-boost strategies, i.e. priming with DNA vaccines and boost with protein formulations or different adjuvants can be utilized to obtain significant protection.
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Affiliation(s)
- Sezer Okay
- 1 Middle East Technical University Department of Biological Sciences 06800 Ankara Turkey
| | - Erkan Özcengiz
- 2 Middle East Technical University Berk Pharma Co., METU Technopolis Gumus Bloklaré, No. 14 06800 Ankara Turkey
| | - Gülay Özcengiz
- 1 Middle East Technical University Department of Biological Sciences 06800 Ankara Turkey
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Salmonella enterica serovar Choleraesuis derivatives harbouring deletions in rpoS and phoP regulatory genes as vehicles for DNA vaccines. Vet Microbiol 2010; 141:81-8. [DOI: 10.1016/j.vetmic.2009.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Revised: 07/09/2009] [Accepted: 08/03/2009] [Indexed: 11/18/2022]
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Hsuan SL, Liao CM, Huang C, Winton JR, Chen ZW, Lee WC, Liao JW, Chen TH, Chiou CJ, Yeh KS, Chien MS. Efficacy of a novel Pasteurella multocida vaccine against progressive atrophic rhinitis of swine. Vaccine 2009; 27:2923-9. [PMID: 19428902 DOI: 10.1016/j.vaccine.2009.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 02/26/2009] [Accepted: 03/04/2009] [Indexed: 11/30/2022]
Abstract
The efficacy of a novel vaccine composed of three short recombinant subunit Pasteurella multocida toxin (PMT) proteins in combination with a bi-valent P. multocida whole-cell bacterin (rsPMT-PM) was evaluated in field studies for prevention and control of progressive atrophic rhinitis (PAR) of swine at 15 conventional farrow-to-finish farms. Experimental piglets that were immunized twice with the rsPMT-PM vaccine developed detectable titers of neutralizing antibodies (greater than 1:8) that prevented the growth retardation and pathological lesions typically observed following challenge with authentic PMT. A total of 542 sows were vaccinated once or twice prior to parturition and serum neutralizing antibody titers were evaluated. Both single and double vaccination protocols induced neutralizing antibody titers of 1:16 or higher in 62% and 74% of sows, respectively. Notably, neither sows nor piglets at a farm experiencing a severe outbreak of PAR at the time of the vaccination trial had detectable antibody titers, but antibody titers increased significantly to 1:16 or higher in 40% of sows following double vaccination. During the year after vaccination, clinical signs of PAR decreased in fattening pigs and growth performance improved sufficiently to reduce the rearing period until marketing by 2 weeks. Collectively, these results indicate that the rsPMT-PM vaccine could be used to provide protective immunity for controlling the prevalence and severity of PAR among farm-raised swine.
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Affiliation(s)
- Shih-Ling Hsuan
- Graduate Institute of Veterinary Pathobiology, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan, ROC
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Sacco RE. DNA vaccines against infectious agents: recent strategies for enhancing immune responses. Expert Opin Ther Pat 2008. [DOI: 10.1517/13543776.18.4.365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Movahedi AR, Hampson DJ. New ways to identify novel bacterial antigens for vaccine development. Vet Microbiol 2008; 131:1-13. [PMID: 18372122 DOI: 10.1016/j.vetmic.2008.02.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 02/07/2008] [Accepted: 02/08/2008] [Indexed: 11/27/2022]
Abstract
This article provides an overview of developments in approaches to identify novel bacterial components for use in recombinant subunit vaccines. In particular it describes the processes involved in "reverse vaccinology", and some associated complementary technologies such as proteomics that can be used in the identification of new and potentially useful vaccine antigens. Results obtained from the application of these new methods are forming a basis for a new generation of vaccines for use in the control of bacterial infections of humans and animals.
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Affiliation(s)
- Abdolreza Reza Movahedi
- School of Veterinary and Biomedical Science, Murdoch University, South Street, Murdoch, Western Australia 6150, Australia
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Luo S, Ho M, Wilson BA. Application of intact cell-based NFAT-beta-lactamase reporter assay for Pasteurella multocida toxin-mediated activation of calcium signaling pathway. Toxicon 2007; 51:597-605. [PMID: 18190943 DOI: 10.1016/j.toxicon.2007.11.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2007] [Revised: 11/18/2007] [Accepted: 11/19/2007] [Indexed: 10/22/2022]
Abstract
Pasteurella multocida toxin (PMT) stimulates and subsequently uncouples phospholipase C beta1 (PLCbeta1) signal transduction through its selective action on the alpha subunit of the Gq-protein. Here, we describe the application of an NFAT-beta-lactamase reporter assay as a functional readout for PMT-induced activation of the Gq-protein-coupled PLCbeta1-IP(3)-Ca(2+) signaling pathway. Use of the NFAT-beta-lactamase reporter assay with a cell-permeable fluorogenic substrate provides high sensitivity due to the absence of endogenous beta-lactamase activity in mammalian cells. This assay system was optimized for cell density, dose and time exposure of PMT stimulation. It is suited for quantitative characterization of PMT activity in mammalian cells and for use as a high-throughput screening method for PMT deletion and point mutants suitable for vaccine development. This method has application's for diagnostic screening of clinical isolates of toxinogenic P. multocida.
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Affiliation(s)
- Shuhong Luo
- Department of Microbiology, University of Illinois at Urbana-Champaign, 601 South Goodwin Avenue, B128 CLSL, Urbana, IL 61801, USA
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