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Sun P, Yang Y, Yang L, Qian Y, Liang M, Chen H, Zhang J, Qiu Y, Guo L, Fu S. Quercetin Protects Blood-Brain Barrier Integrity via the PI3K/Akt/Erk Signaling Pathway in a Mouse Model of Meningitis Induced by Glaesserella parasuis. Biomolecules 2024; 14:696. [PMID: 38927100 PMCID: PMC11201931 DOI: 10.3390/biom14060696] [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: 05/08/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
Glaesserella parasuis (G. parasuis) causes serious inflammation and meningitis in piglets. Quercetin has anti-inflammatory and anti-bacterial activities; however, whether quercetin can alleviate brain inflammation and provide protective effects during G. parasuis infection has not been studied. Here, we established a mouse model of G. parasuis infection in vivo and in vitro to investigate transcriptome changes in the mouse cerebrum and determine the protective effects of quercetin on brain inflammation and blood-brain barrier (BBB) integrity during G. parasuis infection. The results showed that G. parasuis induced brain inflammation, destroyed BBB integrity, and suppressed PI3K/Akt/Erk signaling-pathway activation in mice. Quercetin decreased the expression of inflammatory cytokines (Il-18, Il-6, Il-8, and Tnf-α) and BBB-permeability marker genes (Mmp9, Vegf, Ang-2, and Et-1), increased the expression of angiogenetic genes (Sema4D and PlexinB1), reduced G. parasuis-induced tight junction disruption, and reactivated G. parasuis-induced suppression of the PI3K/Akt/Erk signaling pathway in vitro. Thus, we concluded that quercetin may protect BBB integrity via the PI3K/Akt/Erk signaling pathway during G. parasuis infection. This was the first attempt to explore the protective effects of quercetin on brain inflammation and BBB integrity in a G. parasuis-infected mouse model. Our findings indicated that quercetin is a promising natural agent for the prevention and treatment of G. parasuis infection.
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Affiliation(s)
- Peiyan Sun
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Yaqiong Yang
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Linrong Yang
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Yuanzhuo Qian
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Mingxia Liang
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Hongbo Chen
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, China
- Hubei Provincial Center of Technology Innovation for Domestic Animal Breeding, Wuhan 430023, China
| | - Jing Zhang
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, China
- Hubei Provincial Center of Technology Innovation for Domestic Animal Breeding, Wuhan 430023, China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, China
| | - Ling Guo
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, China
- Hubei Provincial Center of Technology Innovation for Domestic Animal Breeding, Wuhan 430023, China
| | - Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan 430023, China
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2
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Li J, Liu S, Dong Q, Fu Y, Sun Y, Luo R, Tian X, Guo L, Liu W, Qiu Y, Lu Q, Ye C, Zong B, Fu S. PD-1/PD-L1 axis induced host immunosuppression via PI3K/Akt/mTOR signalling pathway in piglets infected by Glaesserella Parasuis. BMC Vet Res 2024; 20:141. [PMID: 38582846 PMCID: PMC10998357 DOI: 10.1186/s12917-024-03993-1] [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: 01/25/2024] [Accepted: 03/27/2024] [Indexed: 04/08/2024] Open
Abstract
Glaesserella parasuis, an important respiratory bacterial pathogen, causes Glässer's disease in piglets, with potential immunosuppression. We established a piglet infection model and explored the immunosuppression mechanism to improve our understanding of the host immune response to G. parasuis. Twenty piglets were randomly divided into two groups (n = 10). The infection group was intraperitoneally challenged with 2 × 108 CFU of G. parasuis in 2 mL TSB. The control group was intraperitoneally injected with equivalent TSB. After 72 h, the piglets were sacrificed, and spleen tissue was collected. PD-1/PD-L1 expression was determined. The splenocytes were isolated to detect CD3+ T, CD3+CD4+ T, CD3+CD8+ T and CD3-CD21+cell differentiation. Via data-independent acquisition (DIA), we compared the proteomics of healthy and infected spleen tissues. Glaesserella parasuis modified CD3+ T, CD3+CD4+ T, CD3+CD8+ T and CD3-CD21+ cell differentiation and PD-1/PD-L1 expression in the spleen. The infection group had 596 proteins with significant differences in expression, of which 301 were significantly upregulated and 295 downregulated. Differentially expressed proteins (DEPs) were mainly related to immune responses. This is the first study on PD-1/PD-L1 expression in the spleen associated with immunosuppression in a piglet model to explore the protein changes related to immune responses via DIA.
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Affiliation(s)
- Jingyang Li
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Siyu Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Qiaoli Dong
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Yunjian Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Yamin Sun
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Ronghui Luo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Xinyue Tian
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Ling Guo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Wei Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Qirong Lu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Chun Ye
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Bingbing Zong
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China
| | - Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, 430023, PR China.
- Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan, 430023, PR China.
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Hu J, Wang D, Huang X, Yang Y, Lian X, Wang W, Xu X, Liu Y. Effects of TolC on the pathogenicity of porcine extraintestinal pathogenic Escherichia coli. Front Immunol 2022; 13:929740. [PMID: 36059454 PMCID: PMC9433895 DOI: 10.3389/fimmu.2022.929740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/27/2022] [Indexed: 11/25/2022] Open
Abstract
Extraintestinal pathogenic Escherichia coli (ExPEC) is a well-known critical pathogenic zoonosis that causes extraintestinal infections in humans and animals by affecting their immune organs. Recently, research on the outer membrane protein of E. coli, tolerant colicin (TolC), a virulent protein in the formation of the ExPEC efflux pump, has been an attractive subject. However, the pathogenic mechanisms remain unclear. This study aimed to explore the role of TolC in the pathogenesis of the ExPEC strain PPECC42; a complementation strain (Cm-TolC) and an isogenic mutant (ΔTolC) were constructed. Loss of TolC drastically impaired the virulence of ExPEC in an experimental mouse model. ΔTolC showed a substantial decrease in the porcine aortic vascular endothelial cell (PAVEC) adherence, invasion, and pro-inflammatory response, in contrast to that of the wild type, with a reduced survival ratio in both the bacterial load and whole blood in mice. ΔTolC also showed decreased expression of necroptosis signals such as receptor-interacting protein kinase 1, phosphorylated mixed-lineage kinase domain-like protein, and mitochondrial proteins such as phosphoglycerate mutase family member 5. Our data suggest that TolC is closely associated with ExPEC pathogenesis. These results provide scientific grounds for exploring the potential of TolC as an effective drug target for controlling ExPEC infection, screening new inhibitors, and developing new drugs. This will allow for further prevention and control of ExPEC infection.
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Affiliation(s)
- Jin Hu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Dongfang Wang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Xingfa Huang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
- Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, South-Central University for Nationalities, Wuhan, China
| | - Yang Yang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Xin Lian
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Wenjun Wang
- Hubei Provincial Key Laboratory for Protection and Application of Special Plants in Wuling Area of China, South-Central University for Nationalities, Wuhan, China
| | - Xiao Xu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Yulan Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
- *Correspondence: Yulan Liu,
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4
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Chen T, Wang C, Hu L, Lu H, Song F, Zhang A, Wang X, Chen H, Tan C. Evaluation of the immunoprotective effects of IF-2 GTPase and SSU05-1022 as a candidate for a Streptococcus suis subunit vaccine. Future Microbiol 2021; 16:721-729. [PMID: 34223787 DOI: 10.2217/fmb-2020-0232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: This study aims to develop a subunit vaccine with high cross-protection for Streptococcus suis. Materials & methods: Four-week-old female BALB/c mice were first immunized with a single and mixed protein. Various indicators, such as antibody titers and various cytokine levels, were further analyzed. Results: The results showed that purified recombinant proteins IF-2 and 1022 had a good protective effect against lethal doses of S. suis serotype 2 and S. suis serotype 9. This study showed immunization with recombinant proteins. Conclusion: IF-2 and 1022 can enhance cross-protection against S. suis serotypes 2 and 9.
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Affiliation(s)
- Tumei Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Chenchen Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Linlin Hu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Hao Lu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Fangyu Song
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Anding Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China.,Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of The People's Republic of China, Wuhan, Hubei, 430070, China.,International Research Center for Animal Disease, Ministry of Science & Technology of The People's Republic of China, Wuhan, Hubei, 430070, China
| | - Xiangru Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China.,Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of The People's Republic of China, Wuhan, Hubei, 430070, China.,International Research Center for Animal Disease, Ministry of Science & Technology of The People's Republic of China, Wuhan, Hubei, 430070, China
| | - Huanchun Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China.,Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of The People's Republic of China, Wuhan, Hubei, 430070, China.,International Research Center for Animal Disease, Ministry of Science & Technology of The People's Republic of China, Wuhan, Hubei, 430070, China
| | - Chen Tan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.,Key Laboratory of Preventive Veterinary Medicine in Hubei Province, The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, 430070, China.,Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture of The People's Republic of China, Wuhan, Hubei, 430070, China.,International Research Center for Animal Disease, Ministry of Science & Technology of The People's Republic of China, Wuhan, Hubei, 430070, China
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5
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Immunogenicity and cross-protective efficacy of double-mutant Streptococcus suis ΔSspepO/ΔSspspC serotypes 2 and 7. Vaccine 2019; 37:2194-2199. [PMID: 30902483 DOI: 10.1016/j.vaccine.2019.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 03/09/2019] [Accepted: 03/11/2019] [Indexed: 11/27/2022]
Abstract
Streptococcus suis serotype 2 (S. suis 2) is a major pathogen causing streptococcosis in swine, resulting in significant losses in swine breeding worldwide. We previously reported that the non-antibiotic-resistant double-mutant strain ΔSspepO/ΔSspspC can be used as a live vaccine, providing effective protection against S. suis 2 infections in mice. This study aimed to understand the characteristics of streptococcosis and develop vaccine candidates for immunization. Intramuscular injection of live S. suis ΔSspepO/ΔSspspC in pigs induced discernable antibody production and provided cross-protection against challenges by a type 2 strain (100% protection) and a type 7 strain (60% protection). Protection was evaluated via clinical, bacteriological, serological, and post-mortem examinations. Furthermore, vaccination induced the production of opsonizing antibodies against serotypes 2 and 7. Analysis of IgG subclasses (IgG1 and IgG2a) revealed that both Th1 and Th2 responses were induced by S. suis ΔSspepO/ΔSspspC, although the IgG2a (Th1) response predominated over the IgG1 (Th2) response. This study is the first, to our knowledge, to establish a live vaccine candidate to protect against two major S. suis serotypes. Further studies are required to assess these candidate vaccines and examine their feasibility in providing cross-protection against S. suis.
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Xu H, Xing J, Tang X, Sheng X, Zhan W. Intramuscular administration of a DNA vaccine encoding OmpK antigen induces humoral and cellular immune responses in flounder (Paralichthys olivaceus) and improves protection against Vibrio anguillarum. FISH & SHELLFISH IMMUNOLOGY 2019; 86:618-626. [PMID: 30513384 DOI: 10.1016/j.fsi.2018.11.073] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/20/2018] [Accepted: 11/30/2018] [Indexed: 05/21/2023]
Abstract
Outer membrane protein K (OmpK) is an immunogenic protein that could act as subunit vaccine candidate for Vibrio anguillarum. In this study, a DNA vaccine encoding the OmpK gene of V. anguillarum was constructed and confirmed to express OmpK in vitro and in vivo. To evaluate the potential of pcDNA3.1-OmpK (pOmpK) as vaccine candidate, the humoral and cellular immune responses, and protective effects were analyzed in flounder model. The results showed that the transcription and translation of OmpK gene occurred in both transfected hirame natural embryo (HINAE) cells and injected fish muscles, indicating the functionality of pOmpK to express OmpK. Fish immunized with pOmpK showed significant increase of surface IgM positive (sIgM+), CD4-1+, CD4-2+ lymphocytes and production of specific anti-V. anguillarum or anti-rOmpK antibodies, which indicate the activation of humoral and cellular immune responses after vaccination. Moreover, a relative percent survival (RPS) rate of 50.00% against V. anguillarum infection was obtained for flounder immunized with pOmpK. In conclusion, this study indicates that pOmpK is able to induce humoral and cellular immune responses and can be used as a DNA vaccine candidate.
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Affiliation(s)
- Hongsen Xu
- 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; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, No. 1 Wenhai Road, Aoshanwei Town, Qingdao, 266071, China.
| | - 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, Aoshanwei Town, Qingdao, 266071, China
| | - Xiuzhen Sheng
- 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, Aoshanwei Town, Qingdao, 266071, China
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7
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Zhu W, Wu C, Kang C, Cai C, Wang Y, Li J, Zhang Q, Sun X, Jin M. Evaluation of the protective efficacy of four newly identified surface proteins of Erysipelothrix rhusiopathiae. Vaccine 2018; 36:8079-8083. [PMID: 30446176 DOI: 10.1016/j.vaccine.2018.10.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 10/15/2018] [Accepted: 10/21/2018] [Indexed: 10/27/2022]
Abstract
Erysipelothrix rhusiopathiae is the causative agent of animal erysipelas and human erysipeloid. Bacterial surface proteins are promising vaccine candidates. We recently identified 3 E. rhusiopathiae surface proteins (GAPDH, HP0728, and HP1472) and characterized their roles as virulence factors. However, their efficacy as protective antigens is still unknown. The N-terminal region of a previously identified surface protein, CbpB (CbpB-N), is speculated to be a protective antigen, but this needs to be verified. The aim of this study was to evaluate the protective efficacy of GAPDH, HP0728, HP1472, and CbpB-N. Immunization with recombinant GAPDH provided complete protection in a mouse model, recombinant CbpB-N provided partial protection, while recombinant HP0728 and HP1472 provided no protection. Recombinant GAPDH also provided good protection in a pig model. GAPDH antiserum exhibited significant blood bactericidal activity against E. rhusiopathiae. In conclusion, GAPDH and CbpB-N were found to be protective antigens of E. rhusiopathiae, and GAPDH is a promising vaccine candidate.
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Affiliation(s)
- Weifeng Zhu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China; Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Chao Wu
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, Wuhan, China; Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
| | - Chao Kang
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Chengzhi Cai
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Ya Wang
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Jingtao Li
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Qiang Zhang
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Life Sciences & Technology, Huazhong Agricultural University, Wuhan, China
| | - Xiaomei Sun
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, Wuhan, China
| | - Meilin Jin
- Animal Infectious Disease Unit, National State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China; College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China; Key Laboratory of Development of Veterinary Diagnostic Products, Ministry of Agriculture, Wuhan, China; Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China.
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8
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Yang X, Zhang H, Shang J, Liu G, Xia T, Zhao C, Sun G, Dou H. Comparative analysis of the blood transcriptomes between wolves and dogs. Anim Genet 2018; 49:291-302. [PMID: 29953636 DOI: 10.1111/age.12675] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/27/2018] [Indexed: 12/24/2022]
Abstract
Dogs were domesticated by human and originated from wolves. Their evolutionary relationships have attracted much scientific interest due to their genetic affinity but different habitats. To identify the differences between dogs and wolves associated with domestication, we analysed the blood transcriptomes of wolves and dogs by RNA-Seq. We obtained a total of 30.87 Gb of raw reads from two dogs and three wolves using RNA-Seq technology. Comparisons of the wolf and dog transcriptomes revealed 524 genes differentially expressed genes between them. We found that some genes related to immune function (DCK, ICAM4, GAPDH and BSG) and aerobic capacity (HBA1, HBA2 and HBB) were more highly expressed in the wolf. Six differentially expressed genes related to the innate immune response (CCL23, TRIM10, DUSP10, RAB27A, CLEC5A and GCH1) were found in the wolf by a Gene Ontology enrichment analysis. Immune system development was also enriched only in the wolf group. The ALAS2, HMBS and FECH genes, shown to be enriched by the Kyoto Encyclopedia of Genes and Genomes analysis, were associated with the higher aerobic capacity and hypoxia endurance of the wolf. The results suggest that the wolf might have greater resistance to pathogens, hypoxia endurance and aerobic capacity than dogs do.
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Affiliation(s)
- X Yang
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - H Zhang
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - J Shang
- College of Information Science and Engineering, Qufu Normal University, Yantai North Road No. 80, Rizhao, Shandong, 276826, China
| | - G Liu
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - T Xia
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - C Zhao
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - G Sun
- College of Life Science, Qufu Normal University, Jingxuan West Road No. 57, Qufu, Shandong, 273165, China
| | - H Dou
- Dailake National Nature Reserve, Manzhouli Road No. 16, Hulunbuir, Inner Mongolia, 021000, China
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9
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Bai X, Shi H, Yang M, Wang Y, Sun Z, Xu S. Identification of key genes implicated in the suppressive function of human FOXP3+CD25+CD4+ regulatory T cells through the analysis of time‑series data. Mol Med Rep 2017; 17:3647-3657. [PMID: 29286140 PMCID: PMC5802170 DOI: 10.3892/mmr.2017.8366] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 04/27/2017] [Indexed: 01/01/2023] Open
Abstract
Human forkhead box P3 (FOXP3)+ cluster of differentiation (CD)25+CD4+ regulatory T cells (Tregs) are a type of T cell that express CD4, CD25 and FOXP3, which are critical for maintaining immune homeostasis. The present study aimed to determine the mechanisms underlying Treg function. The GSE11292 dataset was downloaded from the Gene Expression Omnibus, which included data from Treg cells at 19 time points (0–360 min) with an equal interval of 20 min, and corresponding repeated samples. However, data for Treg cells at time point 120 min were missing. Using the Mfuzz package, the key genes were identified by clustering analysis. Subsequently, regulatory networks and protein-protein interaction (PPI) networks were constructed and merged into integrated networks using Cytoscape software. Using Database for Annotation, Visualization and Integrated Discover software, enrichment analyses were performed for the genes involved in the PPI networks. Cluster 1 (including 292 genes), cluster 2 (including 111 genes), cluster 3 (including 194 genes) and cluster 4 (including 103 genes) were obtained from the clustering analysis. GAPDH (degree, 40) in cluster 1, Janus kinase 2 (JAK2) (degree, 10) and signal transducer and activator of transcription 5A (STAT5A) (degree, 9) in cluster 3, and tumor necrosis factor (TNF) (degree, 26) and interleukin 2 (IL2) (degree, 22) in cluster 4 had higher degrees in the PPI networks. In addition, it was indicated that several genes may have a role in Treg function by targeting other genes [e.g. microRNA (miR)-146b-3p→TNF, miR-146b-5p→TNF, miR-142-5p→TNF and tripartite motif containing 28 (TRIM28)→GAPDH]. Enrichment analyses indicated that IL2 and TNF were enriched in the immune response and T cell receptor signaling pathway. In conclusion, GAPDH targeted by TRIM28, TNF targeted by miR-146b-3p, miR-146b-5p and miR-142-5p, in addition to JAK2, IL2, and STAT5A may serve important roles in Treg function.
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Affiliation(s)
- Xiaofeng Bai
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Hua Shi
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Mingxi Yang
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Yuanlin Wang
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Zhaolin Sun
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
| | - Shuxiong Xu
- Department of Urology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China
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10
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Abstract
BACKGROUND Campylobacter species are a leading cause of bacterial foodborne illness worldwide. Despite the global efforts to curb them, Campylobacter infections have increased continuously in both developed and developing countries. The development of effective strategies to control the infection by this pathogen is warranted. The essential genes of bacteria are the most prominent targets for this purpose. In this study, we used transposon sequencing (Tn-seq) of a genome-saturating library of Tn5 insertion mutants to define the essential genome of C. jejuni at a high resolution. RESULT We constructed a Tn5 mutant library of unprecedented complexity in C. jejuni NCTC 11168 with 95,929 unique insertions throughout the genome and used the genomic DNA of the library for the reconstruction of Tn5 libraries in the same (C. jejuni NCTC 11168) and different strain background (C. jejuni 81-176) through natural transformation. We identified 166 essential protein-coding genes and 20 essential transfer RNAs (tRNA) in C. jejuni NCTC 11168 which were intolerant to Tn5 insertions during in vitro growth. The reconstructed C. jejuni 81-176 library had 384 protein coding genes with no Tn5 insertions. Essential genes in both strain backgrounds were highly enriched in the cluster of orthologous group (COG) categories of 'Translation, ribosomal structure and biogenesis (J)', 'Energy production and conversion (C)', and 'Coenzyme transport and metabolism (H)'. CONCLUSION Comparative analysis among this and previous studies identified 50 core essential genes of C. jejuni, which can be further investigated for the development of novel strategies to control the spread of this notorious foodborne bacterial pathogen.
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Affiliation(s)
- Rabindra K. Mandal
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701 USA
- Present Address: Department of Microbiology and Immunology, Clinical Translational Research Building, University of Louisville, Louisville, KY 40202 USA
| | - Tieshan Jiang
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701 USA
| | - Young Min Kwon
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701 USA
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701 USA
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11
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Guo L, Xu L, Wu T, Fu S, Qiu Y, Hu CAA, Ren X, Liu R, Ye M. Evaluation of recombinant protein superoxide dismutase of Haemophilus parasuis strain SH0165 as vaccine candidate in a mouse model. Can J Microbiol 2017; 63:312-320. [DOI: 10.1139/cjm-2016-0671] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Haemophilus parasuis can cause a severe membrane inflammation disorder. It has been documented that superoxide dismutase (SOD) is a potential target to treat systemic inflammatory diseases. Therefore, we constructed an experimental H. parasuis subunit vaccine SOD and determined the protective efficacy of SOD using a lethal dose challenge against H. parasuis serovar 4 strain MD0322 and serovar 5 strain SH0165 in a mouse model. The results demonstrated that SOD could induce a strong humoral immune response in mice and provide significant immunoprotection efficacy against a lethal dose of H. parasuis serovar 4 strain MD0322 or serovar 5 strain SH0165 challenge. IgG subtype analysis indicated SOD protein could trigger a bias toward a Th1-type immune response and induce the proliferation of splenocytes and secretion of IL-2 and IFN-γ of splenocytes. In addition, serum in mice from the SOD-immunized group could inhibit the growth of strain MD0322 and strain SH0165 in the whole-blood killing bacteria assay. This is the first report that immunization of mice with SOD protein could provide protective effect against a lethal dose of H. parasuis serovar 4 and serovar 5 challenge in mice, which may provide a novel approach against heterogeneous serovar infection of H. parasuis in future.
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Affiliation(s)
- Ling Guo
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Lei Xu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Tao Wu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Shulin Fu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Yinsheng Qiu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Chien-An Andy Hu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Hubei Collaborative Innovation Center for Animal Nutrition and Feed Safety, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
- Biochemistry and Molecular Biology, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA
| | - Xinglong Ren
- College of Science, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Rongrong Liu
- School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
| | - Mengdie Ye
- School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, People’s Republic of China
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12
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Omp16-based vaccine encapsulated by alginate-chitosan microspheres provides significant protection against Haemophilus parasuis in mice. Vaccine 2017; 35:1417-1423. [PMID: 28187951 DOI: 10.1016/j.vaccine.2017.01.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 01/23/2017] [Accepted: 01/26/2017] [Indexed: 12/13/2022]
Abstract
Haemophilus parasuis (H. parasuis) is the etiological agent of swine Glässer's disease, which leads to significant economic loss in swine industry over the world. Subunit vaccine based on outer membrane protein is one of the promising choices to protect pigs against H. parasuis infection despite low immunity efficiency. In this paper, outer membrane protein 16 (Omp16) of H. parasuis encapsulated by alginate-chitosan microspheres as antigen carriers was explored for the first time in a mouse model. Our results showed that the microspheres with Omp16 induced significant higher H. parasuis-specific antibodies, and higher titers of IL-2, IL-4, and IFN-γ than those by Omp16-FIA in treated mice (p<0.05). Moreover, H. parasuis load in the tissues from liver, spleen, and lung of mice immunized with microspheres containing Omp16 was significantly decreased (p<0.05) than that in the same counterpart tissues of control groups. In addition, 80% mice treated with Omp16 and 70% mice with Omp16-FIA were survived after challenged with H. parasuis virulent strain LY02 (serovar 5). Therefore, Omp16-based microsphere vaccine induces both humoral and cellular immune responses and provides promising protection against H. parasuis infection in mice.
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13
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Liu H, Xue Q, Zeng Q, Zhao Z. Haemophilus parasuis vaccines. Vet Immunol Immunopathol 2016; 180:53-58. [DOI: 10.1016/j.vetimm.2016.09.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 09/06/2016] [Accepted: 09/08/2016] [Indexed: 11/24/2022]
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14
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Yu J, Zhang Y, Du Y, Li J, Huang B, Sun W, Cong X, Peng J, Ren S, Gou L, Shi J, Chen Z, Chen L, Li J, Yang J, Wu J, Wang J. The BALB/c mouse infection model for improving the Haemophilus parasuis serotyping scheme. Res Vet Sci 2016; 109:166-168. [PMID: 27892867 DOI: 10.1016/j.rvsc.2016.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 10/06/2016] [Accepted: 10/22/2016] [Indexed: 11/16/2022]
Abstract
The use of BALB/c mouse as an alternative model to study Haemophilus parasuis (HPS) infections was evaluated, supplying the serotyping scheme by comparing the pathogenicity of different serovar HPS in pigs and mice challenge using statistical analysis. Results showed that the pathogenicity of different serovar HPS in mouse was consistent with in pigs, proving that this model is a viable alternative to pigs. It provides a convenient methodology for determining the virulence of HPS strains.
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Affiliation(s)
- Jiang Yu
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Yuyu Zhang
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Yijun Du
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jun Li
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Baohua Huang
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Wenbo Sun
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Xiaoyan Cong
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jun Peng
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China; College of Veterinary Medicine, Shandong Agricultural University, Taian, People's Republic of China
| | - Sufang Ren
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Lihui Gou
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jianli Shi
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Zhi Chen
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Lei Chen
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jianda Li
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jie Yang
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China
| | - Jiaqiang Wu
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China.
| | - Jinbao Wang
- Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China; Shandong Key Lab of Animal Disease Control and Breeding, Jinan, People's Republic of China.
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15
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Zong B, Liu W, Zhang Y, Wang X, Chen H, Tan C. Effect of kpsM on the virulence of porcine extraintestinal pathogenic Escherichia coli. FEMS Microbiol Lett 2016; 363:fnw232. [PMID: 27737948 DOI: 10.1093/femsle/fnw232] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/30/2016] [Accepted: 10/12/2016] [Indexed: 12/21/2022] Open
Abstract
In recent years, extraintestinal pathogenic Escherichia coli (ExPEC) has been found to pose a great threat to human and animal health, but its pathogenic mechanism is not fully understood yet. Capsular polysaccharide, an essential virulence factor in these bacteria, can damage the host immune system, and kpsM is a member of the gene cluster responsible for capsular polysaccharide synthesis. In this study, whole sequence alignment of the virulent strain PCN033 and the attenuated strain PCN061 revealed that kpsM exists in PCN033 but not in PCN061. To determine its function and biological characteristics, we deleted kpsM from PCN033 by homologous recombination. The results of adhesion assays, phagocytosis assays and serum bactericidal assays together with the results of colonization assays in mice indicate that the deletion of kpsM decreases the virulence of porcine ExPEC. Our findings about the biological characteristics of kpsM help to elucidate the complex pathogenic mechanism of ExPEC.
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Affiliation(s)
- Bingbing Zong
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Wugang Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Yanyan Zhang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Xiangru Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Huanchun Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Chen Tan
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,The Cooperative Innovation Center for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, Hubei, China.,Key Laboratory of development of veterinary diagnostic products of Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, Hubei, China
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16
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Characterization and Vaccine Potential of Outer Membrane Vesicles Produced by Haemophilus parasuis. PLoS One 2016; 11:e0149132. [PMID: 26930282 PMCID: PMC4773134 DOI: 10.1371/journal.pone.0149132] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 01/26/2016] [Indexed: 11/19/2022] Open
Abstract
Haemophilus parasuis is a Gram-negative bacterium that colonizes the upper respiratory tract of swine and is capable of causing a systemic infection, resulting in high morbidity and mortality. H. parasuis isolates display a wide range of virulence and virulence factors are largely unknown. Commercial bacterins are often used to vaccinate swine against H. parasuis, though strain variability and lack of cross-reactivity can make this an ineffective means of protection. Outer membrane vesicles (OMV) are spherical structures naturally released from the membrane of bacteria and OMV are often enriched in toxins, signaling molecules and other bacterial components. Examination of OMV structures has led to identification of virulence factors in a number of bacteria and they have been successfully used as subunit vaccines. We have isolated OMV from both virulent and avirulent strains of H. parasuis, have examined their protein content and assessed their ability to induce an immune response in the host. Vaccination with purified OMV derived from the virulent H. parasuis Nagasaki strain provided protection against challenge with a lethal dose of the bacteria.
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17
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Steisslinger V, Korten S, Brattig NW, Erttmann KD. DNA vaccine encoding the moonlighting protein Onchocerca volvulus glyceraldehyde-3-phosphate dehydrogenase (Ov-GAPDH) leads to partial protection in a mouse model of human filariasis. Vaccine 2015; 33:5861-5867. [PMID: 26320419 DOI: 10.1016/j.vaccine.2015.07.110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 06/30/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
River blindness, caused by the filarial parasite Onchocerca volvulus, is a major socio-economic and public health problem in Sub-Saharan Africa. In January 2015, The Onchocerciasis Vaccine for Africa (TOVA) Initiative has been launched with the aim of providing new tools to complement mass drug administration (MDA) of ivermectin, thereby promoting elimination of onchocerciasis in Africa. In this context we here present Onchocerca volvulus glyceraldehyde-3-phosphate dehydrogenase (Ov-GAPDH) as a possible DNA vaccine candidate. We report that in a laboratory model for filariasis, immunization with Ov-GAPDH led to a significant reduction of adult worm load and microfilaraemia in BALB/c mice after challenge infection with the filarial parasite Litomosoides sigmodontis. Mice were either vaccinated with Ov-GAPDH.DNA plasmid (Ov-pGAPDH.DNA) alone or in combination with recombinantly expressed Ov-GAPDH protein (Ov-rGAPDH). During the following challenge infection of immunized and control mice with L. sigmodontis, those formulations which included the DNA plasmid, led to a significant reduction of adult worm loads (up to 57% median reduction) and microfilaraemia (up to 94% reduction) in immunized animals. In a further experiment, immunization with a mixture of four overlapping, synthetic Ov-GAPDH peptides (Ov-GAPDHpept), with alum as adjuvant, did not significantly reduce worm loads. Our results indicate that DNA vaccination with Ov-GAPDH has protective potential against filarial challenge infection in the mouse model. This suggests a transfer of the approach into the cattle Onchocerca ochengi model, where it is possible to investigate the effects of this vaccination in the context of a natural host-parasite relationship.
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Affiliation(s)
- Vera Steisslinger
- Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, D-20359 Hamburg, Germany
| | - Simone Korten
- Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, D-20359 Hamburg, Germany; Department of Infection Medicine, Laboratory Lademannbogen Medical Service Center GmbH (Sonic Healthcare Group), Lademannbogen 61-63, D-22339 Hamburg, Germany
| | - Norbert W Brattig
- Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, D-20359 Hamburg, Germany
| | - Klaus D Erttmann
- Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, D-20359 Hamburg, Germany.
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18
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Hu J, You W, Wang B, Hu X, Tan C, Liu J, Chen H, Bei W. Construction, characterization and evaluation of the protective efficacy of the Streptococcus suis double mutant strain ΔSsPep/ΔSsPspC as a live vaccine candidate in mice. Microbiol Res 2015; 170:87-94. [DOI: 10.1016/j.micres.2014.08.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/27/2014] [Accepted: 08/30/2014] [Indexed: 11/26/2022]
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19
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Identification of putative virulence-associated genes among Haemophilus parasuis strains and the virulence difference of different serovars. Microb Pathog 2014; 77:17-23. [PMID: 25283960 DOI: 10.1016/j.micpath.2014.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 09/29/2014] [Accepted: 10/01/2014] [Indexed: 11/24/2022]
Abstract
This study was aimed at determining virulence-associated genes among Haemophilus parasuis (H. parasuis) strains, and supplying for the Kielstein-Rapp-Gabrielson serotyping scheme. The subtractive fragments, obtained through suppression subtractive hybridization and reverse Southern blot hybridization, were found to encode genes representative of 7 different functions. PCR was used to investigate the distribution of these fragments in H. parasuis strains isolated from different infection sites in pigs. Mice challenge was then used to analyze the correlationship between subtractive fragments, infection sites and bacterial virulence. Eight weeks old female BALB/c mice (10 mice/group) were inoculated intraperitoneally with 3.0 × 10(9) CFU suspension (0.5 ml/mouse) of H. parasuis strains in PBS. Results indicated that H. parasuis possessed varied virulence even among the same serovar strains. Transcription units hsdR, hsdS, gpT and ompP2, identified from the subtractive fragments, were uniformly expressed in highly virulent strains, while absent in weakly virulent strains, and demonstrated variable degrees of expression in moderately virulent strains. Moreover, H. parasuis strains, isolated from pericardium and heart blood, were all highly virulent strains, while from nasal cavity and joint were moderately or weakly virulent strains. This study indicated that fragments hsdR, hsdS, gpT and ompP2 were associated with the virulence of H. parasuis. The virulence of H. parasuis strains isolated from different infection sites was different. The current research provides a new reference for determining bacterial virulence in different H. parasuis strains.
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