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Yan YQ, Jin LB, Wang Y, Lu SY, Pei YF, Zhu DW, Pang FS, Dong H, Hu GX. Goose parvovirus and the protein NS1 induce apoptosis through the AIF-mitochondrial pathway in goose embryo fibroblasts. Res Vet Sci 2021; 137:68-76. [PMID: 33933710 DOI: 10.1016/j.rvsc.2021.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 03/06/2021] [Accepted: 04/13/2021] [Indexed: 10/21/2022]
Abstract
In this study, the effects of Goose parvovirus (GPV) infection as well as the possible role of NS1 protein on apoptosis induction in goose embryo fibroblast (GEF) cells were examined. Flow cytometry analysis and TUNEL assays revealed that GPV infection and NS1 transfection induced significant apoptosis in GEF cells compared to what was observed in mock-infected cells. Interestingly, the increase in the rate of apoptosis detected in GPV-infected GEFs was accompanied by an increased viral load in the cells. In addition, the apoptotic pathway was mediated by apoptosis-inducing factors (AIFs) and internal factors that influence the release of AIFs. The results indicated that the mitochondrial membrane potential was decreased, and AIF expression was increased in the nucleus (P < 0.01). Reactive oxygen species (ROS) increased gradually within 48 h (P < 0.001). Cathepsin D activities were also increased (P < 0.05). The results demonstrated that the AIF-mediated pathway is a new mitochondrial apoptotic pathway and that mitochondrial depolarization, ROS content, and cathepsin D activities are the key factors influencing apoptosis in GEF cells.
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Affiliation(s)
- Yu-Qing Yan
- College of Life Sciences, Jilin Agricultural University, Changchun, Jilin Province 130118, China
| | - Li-Bo Jin
- Institute of Life Sciences, Wenzhou University, Wenzhou, Zhejiang Province 325035, China
| | - Yu Wang
- Jilin Academy of Agricultural Sciences, 130033, China
| | - Song-Yan Lu
- Animal Disease Prevention and Control Center of Jilin Province, Changchun, Jilin Province 130062, China
| | - Yi-Feng Pei
- College of Life Sciences, Jilin Agricultural University, Changchun, Jilin Province 130118, China
| | - Dong-Wei Zhu
- College of Life Sciences, Jilin Agricultural University, Changchun, Jilin Province 130118, China
| | - Fu-Sheng Pang
- College of Life Sciences, Jilin Agricultural University, Changchun, Jilin Province 130118, China
| | - Hao Dong
- College of Life Sciences, Jilin Agricultural University, Changchun, Jilin Province 130118, China.
| | - Gui-Xue Hu
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin Province 130118, China.
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2
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Xu N, Liu Y, Li Y, Tang B, Liang X, Yang Y, Liu M, Liu X, Zhou Y. Rapid Quantum Dot Nanobead-mAb Probe-Based Immunochromatographic Assay for Antibody Monitoring of Trichinella spiralis Infection. Int J Nanomedicine 2021; 16:2477-2486. [PMID: 33824586 PMCID: PMC8018372 DOI: 10.2147/ijn.s304845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/09/2021] [Indexed: 12/23/2022] Open
Abstract
Purpose Sensitive and selective point-of-care biosensor is an urgent pursuit of serological antibody detection to control parasite pathogen. For specific, quantitative and on-site screening of Trichinella spiralis infection in livestock, a quantum dot nanobead-monoclonal antibody (QB-mAb) probe-based immunochromatographic assay (ICA) was developed by introducing a competitive sandwich strategy (QB-CICA). Methods In the QB-CICA, QB-mAb probes competed with serum antibody for a particular epitope, followed by immunocomplexes binding to capture antibody on the test line. With the accumulation of target antibody, captured probes served as signal elements for fluorescent readout in a "turn off" mode, along with the fluorescence gradually weakened. The sensitivity and standard calibration curve of the QB-CICA were quantified using swine sera as negative control (n = 200) and artificial infected swine sera (n = 80) compared with a commercial ELISA kit. Besides, Trichinella spiralis-antibody targeting test ability of the QB-CICA, instead of other parasites or viruses antibodies (n = 10), was evaluated. Results The QB-CICA exhibited a good linear range, a low detection limit of 189.92 ng mL-1 and 100% selectivity that was higher than commercial ELISA kit (90%), as well as the same serological positive rate (100%) with commercial ELISA kit in different infection dose models. Conclusion Taking advantage of its simplicity, short response time (25 min), sensitivity and specificity, the proposed QB-CICA has potential applications for parasite-related antibody monitoring in food safety and clinical diagnosis fields.
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Affiliation(s)
- Ning Xu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Yan Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Yansong Li
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Bin Tang
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Xiongyan Liang
- College of Animal Sciences, Yangtze University, Jingzhou, People's Republic of China
| | - Yuying Yang
- College of Animal Sciences, Yangtze University, Jingzhou, People's Republic of China
| | - Mingyuan Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Xiaolei Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China
| | - Yu Zhou
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, People's Republic of China.,College of Animal Sciences, Yangtze University, Jingzhou, People's Republic of China
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3
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Xiao S, Wang S, Jiang D, Cheng X, Zhu X, Lin F, Yu B, Dong H, Wang X, Munir M, Rohaim MA, Chen S, Chen S. VP2 virus-like particles elicit protective immunity against duckling short beak and dwarfism syndrome in ducks. Transbound Emerg Dis 2021; 69:570-578. [PMID: 33547727 DOI: 10.1111/tbed.14021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/26/2021] [Accepted: 02/01/2021] [Indexed: 11/28/2022]
Abstract
Duckling short beak and dwarfism syndrome virus (SBDSV), an emerging goose parvovirus, has caused short beak and dwarfism syndrome (SBDS) in Chinese duck flocks since 2015. Presently, there is no commercial vaccine against SBDS. In the present study, a virus-like particle (VLP)-based candidate vaccine was developed against this disease. A baculovirus expression system was used to express the SBDSV VP2 protein in Sf9 cells. Immunofluorescence assay, sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blotting were used to confirm protein expression. Furthermore, transmission electron microscopy was used to observe the formation of VLPs. VLPs were formulated into an oil-adjuvanted maternal vaccine to evaluate humoral responses in breeding ducks via latex particle agglutination inhibition assay (LPAI) and microneutralization assay. The offspring were challenged with SBDSV to test the protective efficacy. A single dose of SBDSV was able to induce the high level of LPAI antibodies in ducks, with LPAI and neutralization peak titres of 4.9 ± 1.20 log2 and 7.1 ± 1.20 log2, respectively, at 4 weeks post-vaccination (wpv). The average LPAI titre of yolk antibodies in duck eggs receiving 2 doses (first and boost doses) of the vaccine was 5.3 ± 1.09 log2 at 4 weeks post-boost. The protective efficacy of the maternal vaccine was 87.5%-100%. These results indicate that SBDSV VLPs can be a promising vaccine candidate for controlling SBDS.
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Affiliation(s)
- Shifeng Xiao
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Shao Wang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Dandan Jiang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Xiaoxia Cheng
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Xiaoli Zhu
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Fengqiang Lin
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Bo Yu
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China
| | - Hui Dong
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Xiuzhen Wang
- Putian Institute of Agricultural Science, Putian, China
| | - Muhammad Munir
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster, UK
| | - Mohammed A Rohaim
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster, UK.,Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Shilong Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
| | - Shaoying Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agriculture Sciences, Fuzhou, China.,Fujian Animal Diseases Control Technology Development Center, Fuzhou, China
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4
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Tarasiuk K, Holec-Gąsior L, Ferra B, Rapak A. The development of an indirect ELISA for the detection of goose parvovirus antibodies using specific VP3 subunits as the coating antigen. BMC Vet Res 2019; 15:274. [PMID: 31370852 PMCID: PMC6676559 DOI: 10.1186/s12917-019-2027-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 07/29/2019] [Indexed: 11/16/2022] Open
Abstract
Background In Poland, the leader in goose production in Europe, goose parovirus infection, or Derzsy’s disease (DD), must be reported to the veterinary administration due to the serious economic and epizootic threat to waterfowl production. Prophylactic treatment for DD includes attenuated live or inactivated vaccines. Moreover, the control of DD includes the monitoring of maternal derived antibody (MDA) levels in the offspring and antibody titers in the parent flock after vaccination. The aim of this study was to develop an ELISA for the detection of goose parvovirus (GPV) antibodies. Results Two recombinant protein fragments derived from VP3 (viral protein 3) GPV, namely VP3ep6 and VP3ep4–6 with a mass of 20.9 and 32.3 kDa, respectively, were produced using an Escherichia coli expression system. These proteins were purified by one-step nickel-affinity chromatography, which yielded protein preparations with a purity above 95%. These recombinant proteins were useful in the detection of serum anti-GPV antibodies, and this was confirmed by Western blotting. However, recombinant VP3ep4–6 protein showed a greater ability to correctly identify sera from infected geese. In the next stage of the project, a pool of 166 goose sera samples, previously examined by a virus neutralization test (VN), was tested. For further studies, one recombinant protein (VP3ep4–6) was selected for optimization of the test conditions. After optimization, the newly developed ELISA was compared to other serological tests, and demonstrated high sensitivity and specificity. Conclusion In conclusion, the VP3ep4–6 ELISA method described here can be used for the detection of antibodies to GPV in serum.
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Affiliation(s)
- Karolina Tarasiuk
- Department of Poultry Diseases, National Veterinary Research Institute, Partyzantów 57 Avenue, 24-100, Puławy, Poland.
| | - Lucyna Holec-Gąsior
- Department of Microbiology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Bartłomiej Ferra
- Department of Microbiology, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Andrzej Rapak
- Laboratory of Tumor Molecular Immunobiology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114, Wrocław, Poland
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5
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Liu WJ, Yang YT, Du SM, Yi HD, Xu DN, Cao N, Jiang DL, Huang YM, Tian YB. Rapid and sensitive detection of goose parvovirus and duck-origin novel goose parvovirus by recombinase polymerase amplification combined with a vertical flow visualization strip. J Virol Methods 2019; 266:34-40. [DOI: 10.1016/j.jviromet.2019.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 01/04/2023]
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6
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Haidari H, Zhang Q, Melville E, Kopecki Z, Song Y, Cowin AJ, Garg S. Development of Topical Delivery Systems for Flightless Neutralizing Antibody. J Pharm Sci 2017; 106:1795-1804. [PMID: 28336300 DOI: 10.1016/j.xphs.2017.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/10/2017] [Accepted: 03/10/2017] [Indexed: 12/19/2022]
Abstract
Flightless I (Flii) is an actin remodeling protein important for cytoskeletal regulation and cellular processes including migration, proliferation, and adhesion. Previous studies have clearly identified Flii as a novel therapeutical target for improved wound repair and have demonstrated Flii regulation using Flii neutralizing antibodies (FnAb) in different models of wound healing in vivo. Here we describe the development of an optimized topical delivery system that can neutralize Flii activity in the epidermis. Topical delivery of FnAb is an attractive approach as it provides a convenient application, sustained release, localized effect, and reduced dosage. Three successful formulations were developed, and their physical and chemical stability examined. The in vitro release revealed prolonged and sustained release of FnAb in all the tested formulations. Additionally, penetration studies using intact porcine skin showed that FnAb penetrated the epidermis and upper papillary dermis. The penetrated FnAb significantly reduced Flii expression compared to dosed matched IgG controls. This study has successfully developed a topical delivery system for FnAb that could serve as a potential platform for future localized wound treatments.
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Affiliation(s)
- Hanif Haidari
- Centre for Pharmaceutical Innovation and Development, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Qian Zhang
- Centre for Pharmaceutical Innovation and Development, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Elizabeth Melville
- Regenerative Medicine, Future Industries Institute, University of South Australia, Adelaide, South Australia, Australia
| | - Zlatko Kopecki
- Regenerative Medicine, Future Industries Institute, University of South Australia, Adelaide, South Australia, Australia
| | - Yunmei Song
- Centre for Pharmaceutical Innovation and Development, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5000, Australia
| | - Allison J Cowin
- Regenerative Medicine, Future Industries Institute, University of South Australia, Adelaide, South Australia, Australia
| | - Sanjay Garg
- Centre for Pharmaceutical Innovation and Development, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5000, Australia.
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7
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Yu TF, Ma B, Wang JW. Identification of linear B-cell epitopes on goose parvovirus non-structural protein. Vet Immunol Immunopathol 2016; 179:85-8. [PMID: 27590430 DOI: 10.1016/j.vetimm.2016.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/31/2016] [Accepted: 08/10/2016] [Indexed: 12/11/2022]
Abstract
Goose parvovirus (GPV) infection can cause a highly contagious and lethal disease in goslings and muscovy ducklings which is widespread in all major goose (Anser anser) and Muscovy duck (Cairina moschata) farming countries, leading to a huge economic loss. Humoral immune responses play a major role in GPV immune protection during GPV infection. However, it is still unknown for the localization and immunological characteristics of B-cell epitopes on GPV non-structural protein (NSP). Therefore, in this study, the epitopes on the NSP of GPV were identified by means of overlapping peptides expressed in Escherichia coli in combination with Western blot. The results showed that the antigenic epitopes on the GPV NSP were predominantly localized in the C-terminal (aa 485-627), and especially, the fragment NS (498-532) was strongly positive. These results may facilitate future investigations on the function of NSP of GPV and the development of immunoassays for the diagnosis of GPV infection.
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Affiliation(s)
- Tian-Fei Yu
- College of Veterinary Medicine, Northeast Agriculture University, Harbin 150030, PR China; College of Life Science and Agriculture Forestry, Qiqihar University, Qiqihar 161006, PR China
| | - Bo Ma
- College of Veterinary Medicine, Northeast Agriculture University, Harbin 150030, PR China
| | - Jun-Wei Wang
- College of Veterinary Medicine, Northeast Agriculture University, Harbin 150030, PR China.
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8
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Zhang Y, Bao H, Miao F, Peng Y, Shen Y, Gu W, Meng Q, Wang W, Zhang J. Production and application of polyclonal and monoclonal antibodies against Spiroplasma eriocheiris. Sci Rep 2015; 5:17871. [PMID: 26639364 PMCID: PMC4671143 DOI: 10.1038/srep17871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 11/06/2015] [Indexed: 11/09/2022] Open
Abstract
A new species of spiroplasma, Spiroplasma eriocheiris (S. eriocheiris), was identified as a lethal pathogen of tremor disease (TD) in Chinese mitten crab recently. In order to acquire appropriate biological and diagnostic tools for characterizing this newly discovered pathogen, 5 monoclonal antibodies (mAbs) and a polyclonal antibody (pAb) against S. eriocheiris were produced. Among the mAbs, 6F5, 7C8 and 12H5 lead to the deformation of S. eriocheiris. A peptide sequence, YMRDMQSGLPRY was identified as a mimic motif of MreB that is the cell shape determining protein of S. eriocheiris interacting with 3 mAbs. Furthermore, a double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) for detection of S. eriocheiris was established using the mAb and pAb we prepared. It detected as low as 0.1 μg/mL of S. eriocheiris. No cross-reaction was observed with three other common bacteria (Pseudomonas aeruginosa, Escherichia coli, and Bacillus subtilis) and the hemolymph samples of healthy Eriocheir sinensis. Collectively, our results indicated that the mAbs and pAb we prepared could be used in the analysis of S. eriocheiris membrane proteins mimotope and development of a diagnostic kit for S. eriocheiris infections.
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Affiliation(s)
- Ying Zhang
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Haixun Bao
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Fengqin Miao
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Yaqin Peng
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Yuqing Shen
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
| | - Wei Gu
- Jiangsu Key Laboratory for Biodiversity &Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Qingguo Meng
- Jiangsu Key Laboratory for Biodiversity &Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Wen Wang
- Jiangsu Key Laboratory for Biodiversity &Biotechnology and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Jianqiong Zhang
- Key Laboratory of Developmental Genes and Human Disease, Ministry of Education, Department of Microbiology and Immunology, Medical School, Southeast University, 87 Dingjiaqiao Road, Nanjing 210009, China
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9
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Poskin A, Verite S, Comtet L, Van der Stede Y, Cay B, De Regge N. Persistence of the protective immunity and kinetics of the isotype specific antibody response against the viral nucleocapsid protein after experimental Schmallenberg virus infection of sheep. Vet Res 2015; 46:119. [PMID: 26472116 PMCID: PMC4608186 DOI: 10.1186/s13567-015-0260-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/29/2015] [Indexed: 11/10/2022] Open
Abstract
Schmallenberg virus (SBV) is an Orthobunyavirus that induces abortion, stillbirths and congenital malformations in ruminants. SBV infection induces a long lasting seroconversion under natural conditions. The persistence of the protective immunity and the isotype specific antibody response upon SBV infection of sheep has however not been studied in detail. Five sheep were kept in BSL3 facilities for more than 16 months and subjected to repeated SBV infections. Blood was regularly sampled and organs were collected at euthanasia. The presence of SBV RNA in serum and organs was measured with quantitative real-time PCR. The appearance and persistence of neutralizing and SBV nucleoprotein (N) isotype specific antibodies was determined with virus neutralization tests (VNT) and ELISAs. The primo SBV infection protected ewes against clinical signs, viraemia and virus replication in organs upon challenge infections more than 15 months later. Production of neutralizing SBV specific antibodies was first detected around 6 days post primo-inoculation with VNT and correlated with the appearance of SBV-N specific IgM antibodies. These IgM antibodies remained present for 2 weeks. SBV-N specific IgG antibodies were first detected between 10 and 21 dpi and reached a plateau at 28 dpi. This plateau remained consistently high and no significant decrease in titre was found over a period of more than 1 year. Similar results were found for the neutralising antibody response. In conclusion, the SBV specific IgM response probably eliminates SBV from the blood and the protective immunity induced by SBV infection protects sheep against reinfection for at least 16 months.
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Affiliation(s)
- Antoine Poskin
- CODA-CERVA, Operational Directorate Viral Diseases, Groeselenberg 99, 1180, Brussels, Belgium. .,CODA-CERVA, Coordination of Veterinary Diagnostics Epidemiology and Risk Analysis, Groeselenberg 99, 1180, Brussels, Belgium.
| | - Stephanie Verite
- ID Vet, Service développement, 310 Rue Louis Pasteur, 34790, Grabels, France.
| | - Loic Comtet
- ID Vet, Service développement, 310 Rue Louis Pasteur, 34790, Grabels, France.
| | - Yves Van der Stede
- CODA-CERVA, Coordination of Veterinary Diagnostics Epidemiology and Risk Analysis, Groeselenberg 99, 1180, Brussels, Belgium. .,Department of Veterinary Virology, Parasitology and Immunology, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Brigitte Cay
- CODA-CERVA, Operational Directorate Viral Diseases, Groeselenberg 99, 1180, Brussels, Belgium.
| | - Nick De Regge
- CODA-CERVA, Operational Directorate Viral Diseases, Groeselenberg 99, 1180, Brussels, Belgium. .,Department of Veterinary Virology, Parasitology and Immunology, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
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10
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Evidence for natural recombination in the capsid gene VP2 of Taiwanese goose parvovirus. Arch Virol 2015; 160:2111-5. [PMID: 26085285 DOI: 10.1007/s00705-015-2491-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 06/06/2015] [Indexed: 10/23/2022]
Abstract
To investigate the possible role of recombination in the evolution of Muscovy duck parvovirus (MDPV) and goose parvovirus (GPV) in Taiwan, we analyzed a potentially significant recombination event that occurred only in GPV by comparing thirteen complete sequences of the capsid gene VP2 of GPV and MDPV. The recombination event occurred between GPV strain 06-0239 as the minor parent and strains 99-0808 as the major parent, which resulted in the GPV recombinant V325/TW03. GPV V325/TW03 is likely to represent a new genotype among the Taiwanese GPV strains. This represents the first evidence that intergenotype recombination within the VP2 gene cluster contributes to the genetic diversity of the VP2 genes of Taiwanese GPV field strains.
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