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Zhang W, Wang M, Yuan S, Li W, Huang J, Sun J, Huang Z, Su L, Yee M, Zhang X, Huang S, El-Ashram S, Li Z. Genetic variation analysis of the sigma B protein gene of novel duck reovirus in southeastern China from 2011 to 2020. J Virol Methods 2022; 303:114479. [DOI: 10.1016/j.jviromet.2022.114479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/25/2022] [Accepted: 01/25/2022] [Indexed: 11/30/2022]
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Zheng M, Chen X, Wang S, Wang J, Huang M, Xiao S, Cheng X, Chen S, Chen X, Lin F, Chen S. A TaqMan-MGB real-time RT-PCR assay with an internal amplification control for rapid detection of Muscovy duck reovirus. Mol Cell Probes 2020; 52:101575. [PMID: 32305339 DOI: 10.1016/j.mcp.2020.101575] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/12/2020] [Accepted: 04/12/2020] [Indexed: 10/24/2022]
Abstract
A real-time reverse transcriptase-polymerase chain reaction (RT-PCR) for the detection of Muscovy duck reovirus (MDRV) RNA in clinical samples is described. The assay is based on TaqMan-MGB technology, consisting of two primers and one probe labeled with the reporter dye 6-carboxyfluorescein that binds selectively to the sigma B-protein gene of MDRV. This technique also includes an Internal Positive Control (IPC). The real-time RT-PCR assay was able to detect MDRVs, whereas other common waterfowl-origin viral pathogens were not recognised by the established oligonucleotide set, thus showing that the test was specific for MDRV. The sensitivity of the assay was 2.83 × 101 copies/μL and was 100 times higher than that of the conventional RT-PCR. The variation coefficients of intra-assay and inter-assay were less than 1.5% which verified sufficient repeatability of this assay. The use of β-actin mRNA as an IPC in order not to reduce the efficiency of the assay was adopted. The detection for 100 clinical samples showed that the positive rate of the established TaqMan-MGB real-time RT-PCR method was 87% (87/100), while the positive rate of the conventional RT-PCR was 83% (83/100), with the coincidence rate was 97.14%. Sensitivity and positive rate for clinical samples of TaqMan fluorescent quantitative RT-PCR were higher than conventional RT-PCR. The high specificity, sensitivity, and rapidity TaqMan-MGB real-time RT-PCR assay with the use of IPC to monitor for false negative results can make this method suitable for the pathogenic surveillance and epidemiological investigation of MDRV infection.
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Affiliation(s)
- Min Zheng
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Xiuqin Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Shao Wang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China.
| | - Jingxiang Wang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China
| | - Meiqing Huang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Shifeng Xiao
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Xiaoxia Cheng
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Shilong Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China
| | - Xiaoli Chen
- Agricultural and Rural Bureau, Sanming, 365000, China
| | - Fengqianq Lin
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China.
| | - Shaoying Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China; Fujian Animal Diseases Control Technology Development Center, Fuzhou, 350013, China.
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Characterization of Monoclonal Antibodies against σA Protein and Cross-Reactive Epitope Identification and Application for Detection of Duck and Chicken Reovirus Infections. Pathogens 2019; 8:pathogens8030140. [PMID: 31500272 PMCID: PMC6789564 DOI: 10.3390/pathogens8030140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 08/29/2019] [Accepted: 08/30/2019] [Indexed: 11/16/2022] Open
Abstract
Although σA is an important major core protein of duck reovirus (DRV), the B-cell epitopes of this protein remain unknown to reseacrhers. Six monoclonal antibodies (MAbs) (1A7, 3F4, 5D2, 4E2, 3C7, and 2B7) were developed by using prokaryotic-expressed recombinant His-σA protein. Five of six MAbs (1A7, 3F4, 4E2, 3C7, and 2B7) reacted with His-σA protein in a conformation-independent manner, while 5D2 reacted with σA in a conformation-dependent manner. Immunofluorescence assays showed that the MAbs could specifically bind to DRV infected BHK-21 cells. The MAbs were delineated as three groups by a competitive binding assay. By using 12-mer peptide phage display and mutagenesis, MAb 4E2 was identified to recognize minimal epitope 56EAPYPG61 and MAb 1A7 recognize 341WVV/MAGLI/V347, residues 341V/M and 347I/V are replaceable. Dot blotting and sequence analysis confirmed that EAPYPG and WVV/MAGLI/V are cross-reactive epitopes in both DRV and avian reovirus (ARV). An enzyme-linked immunosorbent assay (ELISA) based on two expressed EAPYPG and WVVAGLI as antigen demonstrated its diagnostic potential by specific reacting with serum samples from DRV- or ARV-infected birds. Based on these observations, an epitope-based ELISA could be potentially used for DRV or ARV surveillance. These findings provide insights into the organization of epitopes on σA protein that might be valuable for the development of epitope-based serological diagnostic tests for DRV and ARV infection.
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Li Z, Zhang X, Hu X, Tian J, Kang H, Guo D, Liu J, Qu L. Development of an indirect ELISA assay for detecting antibodies against mammalian reovirus in pigs. J Virol Methods 2018; 262:61-64. [DOI: 10.1016/j.jviromet.2018.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 06/23/2018] [Accepted: 07/13/2018] [Indexed: 12/29/2022]
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Detection of Novel duck reovirus (NDRV) using visual reverse transcription loop-mediated isothermal amplification (RT-LAMP). Sci Rep 2018; 8:14039. [PMID: 30232402 PMCID: PMC6145877 DOI: 10.1038/s41598-018-32473-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 08/30/2018] [Indexed: 01/06/2023] Open
Abstract
Here we present a visual reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay for detecting the gene encoding the σB major outer-capsid protein of novel duck reovirus (NDRV). A set of primers, composed of two outer primers, two inner primers and two loop primers, was designed based on the gene of interest. The LAMP reaction was conducted in a traditional laboratory water bath at 65 °C for 50 min. We compared the performance of calcein/Mn2+ and SYBR Green I dyes, as well as electrophoresis on agarose gel stained with GoldView nucleic acid dye to detect the RT-LAMP-amplified products and all assays could be employed to discriminate between positive and negative specimens in visible or UV light. Our data showed that there is no cross-reaction with other viruses and the RT-LAMP technique displayed high sensitivity for detecting NDRV with a minimal detection limit of 200 fg RNA input. This assay was more sensitive than conventional PCR in detecting NDRV both in natural and experimental infection. In conclusion, the RT-LAMP technique was remarkably sensitive, specific, rapid, simple and profitable for the identification of NDRV.
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Wang Q, Liu M, Yuan X, Li C, Chen S, Zhuang Y, Wu Y, Huang Y, Wu B. Transcriptomic analysis reveals the molecular mechanism of apoptosis induced by Muscovy duck reovirus. Genes Genomics 2017. [DOI: 10.1007/s13258-017-0567-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Niu X, Zhang B, Yu X, Zhang X, Dou Y, Tang Y, Diao Y. Preparation and evaluation of goose reovirus inactivated vaccine. BMC Vet Res 2017; 13:214. [PMID: 28683792 PMCID: PMC5501479 DOI: 10.1186/s12917-017-1134-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 06/26/2017] [Indexed: 12/22/2022] Open
Abstract
Background Infection with Goose Reovirus (GRV) can cause serious economic losses in the goose breeding industry. In this study, the GRV allantoic fluid was concentrated and used as an antigen in a formalin-inactivated oil-emulsion vaccine. Results When 6 day-old geese were inoculated, antibodies against GRV became detectable at 6 days post-vaccination, their concentration peaked at 3 weeks. These antibodies were maintained for longer than 2 weeks. As the most susceptible age for GRV infection is birds under 2 weeks of age this vaccine should provide adequate cover for the most at risk birds. When geese were exposed to reovirus at different time intervals after immunization, the data revealed that the vaccine can provide a protection rate of 80%. The developed vaccine has good stability and could be stored at 4 °C for at least 12 months. Conclusion These results indicate that the developed GRV vaccine is safe, effectively absorbed, efficacious in inducing a rapid immune response, and effective in controlling GRV infection. Our results should be useful for the application of vaccines for controlling GRV in different goose flocks. Electronic supplementary material The online version of this article (doi:10.1186/s12917-017-1134-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaoyu Niu
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China
| | - Bingqian Zhang
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China
| | - Xianglong Yu
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China
| | - Xin Zhang
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China
| | - Yanguo Dou
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China
| | - Yi Tang
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China.
| | - Youxiang Diao
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Road 61, Tai'an, Shandong, 271018, China.
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Yun T, Chen H, Yu B, Zhang C, Chen L, Ni Z, Hua J, Ye W. Development and application of an indirect ELISA for the detection of antibodies to novel duck reovirus. J Virol Methods 2015; 220:55-9. [PMID: 25907470 DOI: 10.1016/j.jviromet.2015.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 04/07/2015] [Accepted: 04/10/2015] [Indexed: 11/19/2022]
Abstract
A novel duck reovirus (N-DRV) disease emerged in China in 2000 and it has become an epidemic genotype. A test for detection of virus-specific antibodies in serum samples would be useful for epidemiological investigations. Currently, Currently, serological assays for N-DRV diagnosis are not available. A test for detection of virus-specific antibodies in serum samples would be useful for epidemiological investigations. In this study, a highly sensitive and specific indirect enzyme-linked immunosorbent assay (ELISA) for the detection of antibodies to N-DRV was developed. The outer capsid (σC) of N-DRV was cloned and expressed in Escherichia coli as a coating antigen. The antigen concentration and serum dilution were optimized using a checkerboard titration. Furthermore, the specificity of σC-ELISA assay was confirmed by cross checking with other duck viral pathogens. In comparison with the western blot, the sensitivity and specificity of the σC-ELISA was 92.6% and 88.9%, respectively, and agreement of two tests was excellent with κ value of 0.786 (p < 0.05). A serological survey was performed using the assay on serum samples from different age and species of duck flocks in the Zhejiang and Jiangsu Province, China. The seropositive rate of the 1209 serum samples was 57.7%. In conclusion, the developed σC-ELISA assay is a very specific and sensitive test that will be useful for large-scale serological survey in N-DRV infection and monitoring antibodies titers against N-DRV.
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Affiliation(s)
- Tao Yun
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Haipeng Chen
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Bin Yu
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Cun Zhang
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Liu Chen
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Zheng Ni
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jionggang Hua
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Weicheng Ye
- Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
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Chen Z, Luo G, Wang Q, Wang S, Chi X, Huang Y, Wei H, Wu B, Huang S, Chen JL. Muscovy duck reovirus infection rapidly activates host innate immune signaling and induces an effective antiviral immune response involving critical interferons. Vet Microbiol 2015; 175:232-43. [DOI: 10.1016/j.vetmic.2014.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 12/05/2014] [Accepted: 12/08/2014] [Indexed: 12/24/2022]
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Yin CH, Qin LT, Sun MY, Gao YL, Qi XL, Gao HL, Wang YQ, Wang XM. Antigenic analysis of monoclonal antibodies against different epitopes of σB protein of avian reovirus. PLoS One 2013; 8:e81533. [PMID: 24312314 PMCID: PMC3842295 DOI: 10.1371/journal.pone.0081533] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 10/14/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Avian reovirus (ARV) causes arthritis, tenosynovitis, runting-stunting syndrome (RSS), malabsorption syndrome (MAS) and immunosuppression in chickens. σB is one of the major structural proteins of ARV, which is able to induce group-specific antibodies against the virus. METHODS AND RESULTS The present study described the identification of two linear B-cell epitopes in ARV σB through expressing a set of partially overlapping and consecutive truncated peptides spanning σB screened with two monoclonal antibodies (mAbs) 1F4 and 1H3-1.The data indicated that (21)KTPACW(26) (epitope A) and (32)WDTVTFH(38) (epitope B) were minimal determinants of the linear B cell epitopes. Antibodies present in the serum of ARV-positive chickens recognized the minimal linear epitopes in Western blot analyses. By sequence alignment analysis, we determined that the epitopes A and B were not conserved among ARV, duck reovirus (DRV) and turkey reovirus (TRV) strains. Western blot assays, confirmed that epitopes A and B were ARV-specific epitopes, and they could not react with the corresponding peptides of DRV and TRV. CONCLUSIONS AND SIGNIFICANCE We identified (21)KTPACW(26) and (32)WDTVTFH(38) as σB -specific epitopes recognized by mAbs 1F4 and 1H3-1, respectively. The results in this study may have potential applications in development of diagnostic techniques and epitope-based marker vaccines against ARV groups.
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Affiliation(s)
- Chun-hong Yin
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Li-ting Qin
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Mei-yu Sun
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Yu-long Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Xiao-le Qi
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Hong-lei Gao
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Yong-qiang Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
| | - Xiao-mei Wang
- Division of Avian Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, P. R. China
- * E-mail:
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Antigenic analysis monoclonal antibodies against different epitopes of σB protein of Muscovy duck reovirus. Virus Res 2011; 163:546-51. [PMID: 22197425 DOI: 10.1016/j.virusres.2011.12.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 12/07/2011] [Accepted: 12/08/2011] [Indexed: 11/23/2022]
Abstract
σB is one of the major structural proteins of Muscovy duck reovirus (DRV), which is able to induce protective immune response in target birds. Four anti-DRV σB MAbs were identified belong to two distinct epitopes, designated A (1E5, 4E3, and 5D8) and B (2F7) (Liu et al., 2010). To understand antigenic determinants of the σB protein, a set of 20 (P1-P20), partially overlapping and consecutive peptides spanning σB were expressed and then screened by MAbs. With Western blot and enzyme-linked immunosorbent assay (ELISA), two minimal units of the linear epitopes, 19YIRAPACWD27 (epitope B) and 65TDGVCFPHHK74 (epitope A), were identified within N-terminal region of the σB protein. The epitope B was highly conserved among DRV and avian reovirus (ARV) strains through sequence alignment analysis. Immunofluorescence assays (IFA) and ELISA, confirmed that epitope B is a broad group-specific epitope among DRV and ARV. Epitope A could only react with chicken embyonated fibroblast cells (CEF) infected with DRV, but not ARV. However, both peptides have good immunogenicity and could induce antibodies against DRV in BALB/c mice. This report documents the first identification of σB epitopes in the precise locations. The two probes would be useful in the development of discriminating diagnostic kits for DRV and ARV infection.
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Goldenberg D, Lublin A, Rosenbluth E, Heller ED, Pitcovski J. Differentiating infected from vaccinated animals, and among virulent prototypes of reovirus. J Virol Methods 2011; 177:80-6. [PMID: 21762731 DOI: 10.1016/j.jviromet.2011.06.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 06/27/2011] [Accepted: 06/29/2011] [Indexed: 11/17/2022]
Abstract
Birds are most susceptible to infection by avian reovirus, genus Orthoreovirus family Reoviridae, at a young age. Although chicks are protected by antibodies transferred from vaccinated maternal flocks, due to the many variants in the field, the efficiency of the vaccines is limited. The level of antibodies against viruses is generally determined by enzyme-linked immunosorbent assay (ELISA), using the whole virus as the antigen. This has some disadvantages: first, the test measures antibodies against all capsid proteins, most of which are irrelevant for neutralizing the virus, and as such does not reflect the real protection status; second, it is impossible to distinguish between vaccine- and infection-derived antibodies. In the case of a virus that changes frequently, a third disadvantage is the inability to distinguish among serotypes. The aim of this study was to develop a test that would address these concerns. Four prototypes of the avian reovirus protein sigma C were used as antigens on the ELISA plate. Sigma C is the main protein inducing neutralizing antibodies and the most variable among strains and isolates, and it is used for reovirus classification. This differentiating ELISA enabled distinguishing between vaccine and field strains of the virus, identifying the infection source, and in the case of vaccination, exclusively determining the level of protective antibodies. Whereas the whole virus detected antibodies against all strains, differentiating ELISA enabled differentiating between infected and vaccinated animals (DIVA) and in most cases, identifying the sigma C genotype. In a field study, a correlation was found between disease symptoms and antibodies identified against virulent strains in the flock. Thus virulent strains can be identified in the field, enabling adjustment of the relevant vaccines.
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Li C, Cheng A, Wang M, Zhang N, Shen C, Yang J, Zhu D, Jia R, Luo Q, Chen X. Development and Validation of an Indirect Enzyme-Linked Immunosorbent Assay for the Detection of Antibodies Against Duck Swollen Head Hemorrhagic Disease Virus. Avian Dis 2010; 54:1270-4. [DOI: 10.1637/9413-060110-reg.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Development and evaluation of a VP1-ELISA for detection of antibodies to duck hepatitis type 1 virus. J Virol Methods 2010; 169:66-9. [DOI: 10.1016/j.jviromet.2010.06.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 06/23/2010] [Accepted: 06/28/2010] [Indexed: 11/17/2022]
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Goldenberg D, Pasmanik-Chor M, Pirak M, Kass N, Lublin A, Yeheskel A, Heller D, Pitcovski J. Genetic and antigenic characterization of sigma C protein from avian reovirus. Avian Pathol 2010; 39:189-99. [PMID: 20544425 DOI: 10.1080/03079457.2010.480969] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Avian reovirus (ARV) causes viral arthritis, tenosynovitis, liver infection and immunosuppression in birds. Live-attenuated and inactivated vaccines for ARV are available, but do not efficiently protect against recent variants. Sigma C, which mediates virus attachment to target cells, is the most variable protein in ARV. Antibodies to this protein neutralize viral infection. The purpose of the present study was to characterize sigma C in isolates of ARV from infected birds, as compared with the vaccine strain. Amino acids 27 to 293 of sigma C from 28 Israeli isolates were compared, classified and analysed using bioinformatics tools. Large variations were found among the isolates, and the vaccine strain was shown to differ from most of the studied strains, which could explain the failure of commonly used vaccinations in protecting birds against ARV infection. Based on sigma C protein sequences from all over the world, ARV can be divided into four groups. Isolates from all groups were found in the field simultaneously, possibly explaining the insufficient protection achieved by the vaccine strain, which is represented in one of the groups. The results point out the need and the difficulty in producing a wide-ranging vaccine. Several conserved regions among all reported ARV sigma C proteins were identified. These peptides were further studied for structural and functional properties, and for antigenic characterization. The results of this study shed light on peptide selection for a broad and efficient vaccine.
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Liu M, Chen X, Wang Y, Zhang Y, Li Y, Wang Y, Shen N, Chen H. Characterization of monoclonal antibodies against Muscovy duck reovirus sigmaB protein. Virol J 2010; 7:133. [PMID: 20569474 PMCID: PMC2907335 DOI: 10.1186/1743-422x-7-133] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Accepted: 06/23/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The sigmaB protein of Muscovy duck reovirus (DRV), one of the major structural proteins, is able to induce neutralizing antibody in ducks, but the monoclonal antibody (MAb) against sigmaB protein has never been characterized. RESULTS Four hybridoma cell lines secreting anti-DRV sigmaB MAbs were obtained, designated 1E5, 2F7, 4E3 and 5D8. Immunoglobulin subclass tests differentiated them as IgG2b (1E5 and 4E3) and IgM (2F7 and 5D8). Dot blot and western blotting assays showed that MAbs reacted with His-sigmaB protein in a conformation-independent manner. Competitive binding assay indicated that the MAbs delineated two epitopes, A and B of sigmaB. Immunofluorescence assay indicated that the four MAbs could specifically bind to Vero cells infected with DRV and sigmaB was distributed diffusely in the cytoplasma of infected cells. MAbs had universal reactivity to all DRVs tested in an antigen-capture enzyme-linked immunosorbent assay. CONCLUSION Results of this research provide important information about the four monoclonal antibodies and therefore the MAbs may be useful candidate for the development of a MAb capture ELISA for rapid detection of DRVs. In addition, it showed that the sigmaB protein was located in the cytoplasma of infected cells by immunofluorescence assay with MAbs. Virus isolation and RT-PCR are reliable way for detection of DRV infection, but these procedures are laborious, time consuming, and requiring instruments. These obvious diagnosis problems highlight the ongoing demand of rapid, reproducible, and automatic methods for the sensitive detection of DRV.
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Affiliation(s)
- Ming Liu
- National Avian Influenza Reference Laboratory, Animal Influenza Laboratory of the Ministry of Agriculture, Harbin Veterinary Research Institute, CAAS, Harbin 150001, China
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Yang ZJ, Wang CY, Lee LH, Chuang KP, Lien YY, Yin HS, Tong DW, Xu XG, Liu HJ. Development of ELISA kits for antibodies against avian reovirus using the σC and σB proteins expressed in the methyltropic yeast Pichia pastoris. J Virol Methods 2010; 163:169-74. [DOI: 10.1016/j.jviromet.2009.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 07/06/2009] [Accepted: 07/20/2009] [Indexed: 11/24/2022]
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