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Ni Z, Yun T, Chen L, Ye W, Hua J, Zhu Y, Liu G, Zhang C. Study on the Protective Immunity Induced by Pseudotyped Baculovirus Expressing the E Protein of Tembusu Virus in Ducklings. Genes (Basel) 2023; 14:1316. [PMID: 37510221 PMCID: PMC10378915 DOI: 10.3390/genes14071316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/15/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
The Duck Tembusu virus (DTMUV), a pathogenic flavivirus, has been causing significant economic losses in the Chinese poultry industry since 2010. This virus can severely decrease egg production and inhibit the growth of laying ducks and ducklings. While many vaccines have been developed to prevent DTMUV infection, fresh outbreaks continue to occur, as few effective vaccines are available. The E glycoprotein of DTMUV is the primary target for inducing protective immunity in the natural host. Therefore, we conducted an investigation and successfully developed a recombinant baculovirus containing the DTMUV E gene. Ducklings were then vaccinated with the purified protein derived from this virus as a potential vaccine candidate. Our findings demonstrated that the E glycoprotein of DTMUV was highly expressed in Sf9 cells. The vaccination of ducklings with the recombinant baculovirus Bac-E resulted in the induction of strong humoral and cellular immune responses. Most significantly, we observed that the vaccine provided 100% protective immunity against lethal challenges with the DTMUV YY5 strain.
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Affiliation(s)
- Zheng Ni
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Tao Yun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Liu Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Weicheng Ye
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Jionggang Hua
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Yinchu Zhu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Guangqing Liu
- Shanghai Veterinary Research Institute, Chinese Academy at Agricultural Sciences, Shanghai 200241, China
| | - Cun Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Animal Husbandry and Veterinary Sciences, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
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Yang B, Meng R, Feng C, Huang J, Li Q, Wang X, Zhang D. An Antibody Neutralization Determinant on Domain III and the First α-Helical Domain in the Stem-Anchor Region of Tembusu Virus Envelope Protein. The Journal of Immunology 2022; 209:684-695. [DOI: 10.4049/jimmunol.2200226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/06/2022] [Indexed: 01/04/2023]
Abstract
Abstract
Previous studies identified three neutralizing epitopes on domains I, II, and III of the Tembusu virus (TMUV) envelope (E). More evidence is needed to understand the molecular basis of Ab-mediated neutralization and protection against TMUV. In this study, we observed a neutralizing mAb, 6C8, that neutralized TMUV infection primarily by inhibiting cell attachment. In immunofluorescence assays, 6C8 recognized the premembrane and E proteins coexpressed in HEK-293T cells, but failed to react with premembrane or E expressed individually. Epitope mapping identified nine E protein residues positioned on BC/EF loops and F/G strands in domain III and the first α-helical domain in the stem region. Further investigation with mutant viruses showed that 6C8 pressure resulted in mutations at residues 330 of BC loop and 409 of the first α-helical domain, although 6C8 only exhibited a moderate neutralizing activity in BHK-21 cells and a weak protective activity in BALB/c mice and Shaoxing duck models. Mutations A330S and T409M conferred high- and low-level 6C8 resistance, respectively, whereas the combination of A330S and T409M mutations conferred moderate-level 6C8 resistance. As a result, a quasispecies comprising three groups of antigenic variants appeared in BHK-21 cell–derived viral stocks after repeated passages of TMUV strain Y in the presence of 6C8 treatment. Taken together, these findings have raised a concern about Ab-induced antigenic variations in vivo, and they have revealed information concerning the conformational structure of the 6C8 epitope and its role in constraint on antigenic variations. The present work contributes to a better understanding of the complexity of the TMUV immunogen.
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Affiliation(s)
- Baolin Yang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Runze Meng
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Chonglun Feng
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jingjing Huang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Qiong Li
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiaoyan Wang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Dabing Zhang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Qu S, Wang X, Yang L, Meng R, Feng C, Yang B, Huang J, Li Q, Wang J, Zhang D. Mapping of a unique epitope on domain III of the envelope protein of Tembusu virus. Virus Res 2021; 306:198582. [PMID: 34599934 DOI: 10.1016/j.virusres.2021.198582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 10/20/2022]
Abstract
We recently developed a Tembusu virus (TMUV)-specific monoclonal antibody (MAb) 12F11, which was found to recognize a long amino acid sequence between residues 8 and 77 of domain III of the envelope protein (EDIII). Here, the epitope recognized by MAb 12F11 was mapped using alanine substitutions combined with dissociation constant analysis. The findings, and prediction of tertiary structure of TMUV EDIII, showed that the MAb 12F11 epitope contained one critical residue and 13 peripheral residues. Moreover, the antigenic site was shown to span four loops (N-terminal region, AB, BC, and CD) and three β-strands (A, B, and D). The present work contributes to the understanding of antigenic structure of TMUV envelope protein.
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Affiliation(s)
- Shenghua Qu
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Xiaoyan Wang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Lixin Yang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Runze Meng
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Chonglun Feng
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Baolin Yang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Jingjing Huang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Qiong Li
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Jiaying Wang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China
| | - Dabing Zhang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, Haidian district 100193, People's Republic of China.
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Qu S, Wang X, Yang L, Lv J, Meng R, Dai W, Li Q, Liu H, Zhang B, Zhang D. Identification of a Neutralizing Monoclonal Antibody That Recognizes a Unique Epitope on Domain III of the Envelope Protein of Tembusu Virus. Viruses 2020; 12:E647. [PMID: 32549221 DOI: 10.3390/v12060647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 12/30/2022] Open
Abstract
Domain III of the envelope protein (EDIII) is the major target of flavivirus neutralizing antibody. To date, little is known regarding antibody-mediated neutralization of Tembusu virus (TMUV), a novel flavivirus emerging in duck in 2010. Here, a novel monoclonal antibody (MAb), designated 12F11, was prepared by immunization of mice with recombinant EDIII (rEDIII) protein. Using virus neutralization test, 12F11 in undiluted ascites neutralized the TMUV infectivity to induce the development of cytopathic effects in BHK-21 cells, indicating that 12F11 exhibits a neutralizing activity. The neutralizing activity of 12F11 was confirmed by plaque reduction neutralization test, in which 12F11 reduced significantly the number of plaques produced by TMUV in BHK-21 cells. Western blot analyses of a series of truncated rEDIII proteins showed that the epitope recognized by 12F11 includes amino acids between residues 8 and 77 of EDIII protein. Function analysis demonstrated that 12F11 neutralizes TMUV infection at virus adsorption and at a step after adsorption to a certain extent. The present study provides an important step towards elucidating antibody-mediated neutralization of TMUV.
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Zhou Q, Bi Z, Yin D, Gu X, Xu Z, Huang R, Xing X, Qi K, Wang G. Development and application of an indirect ELISA for the serological detection of duck Tembusu virus infection based on the NS1 protein antigen. Arch Virol 2019; 165:709-714. [PMID: 31873767 DOI: 10.1007/s00705-019-04495-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 11/06/2019] [Indexed: 02/01/2023]
Abstract
Duck Tembusu virus (DTMUV) has caused significant economic losses in China since 2010. However, there is still a lack of effective methods to diagnose the disease caused by this virus, and especially to differentiate infection from vaccination. In this study, we established a novel indirect enzyme-linked immunosorbent assay (iELISA) and performed a retrospective serological survey for DTMUV in Anhui province, China. Our results show that the iELISA displayed high specificity sensitivity, and with no serological cross-reaction with other duck pathogens. These findings indicate that the newly developed iELISA could be a useful screening tool for large-scale monitoring of the epidemiology of DTMUV infection in ducks.
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Affiliation(s)
- Qi Zhou
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zhuangli Bi
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Dongdong Yin
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China
| | - Xiangxue Gu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Zejun Xu
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Rong Huang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Xue Xing
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Kezong Qi
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China.
| | - Guijun Wang
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China. .,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Hefei, 230036, China.
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Zhao D, Liu Q, Huang X, Wang H, Han K, Yang J, Bi K, Liu Y, Zhang L, Li Y. Identification of determinants that mediate binding between Tembusu virus and the cellular receptor heat shock protein A9. J Vet Sci 2018; 19:528-535. [PMID: 29649860 PMCID: PMC6070589 DOI: 10.4142/jvs.2018.19.4.528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/16/2018] [Accepted: 03/20/2018] [Indexed: 12/19/2022] Open
Abstract
Heat shock protein A9 (HSPA9), a member of the heat shock protein family, is a putative receptor for Tembusu virus (TMUV). By using Western blot and co-immunoprecipitation assays, E protein domains I and II were identified as the functional domains that facilitate HSPA9 binding. Twenty-five overlapping peptides covering domain I and domain II sequences were synthesized and analyzed by using an HSPA9 binding assay. Two peptides showed the capability of binding to HSPA9. Dot blot assay of truncated peptides indicated that amino acid residues 19 to 22 and 245 to 252 of E protein constitute the minimal motifs required for TMUV binding to HSPA9. Importantly, peptides harboring those two minimal motifs could effectively inhibit TMUV infection. Our results provide insight into TMUV-receptor interaction, thereby creating opportunities for elucidating the mechanism of TMUV entry.
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Affiliation(s)
- Dongmin Zhao
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Qingtao Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Xinmei Huang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Huili Wang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Kaikai Han
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Jing Yang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Keran Bi
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Yuzhuo Liu
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Lijiao Zhang
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
| | - Yin Li
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, Nanjing 210014, China
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Yu G, Yu X, Yang G, Tang Y, Diao Y. A Novel Diagnostic Method to Detect Duck Tembusu Virus: A Colloidal Gold-Based Immunochromatographic Assay. Front Microbiol 2018; 9:1001. [PMID: 29867893 PMCID: PMC5963251 DOI: 10.3389/fmicb.2018.01001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 04/27/2018] [Indexed: 12/14/2022] Open
Abstract
Duck Tembusu virus (DTMUV) is an emerging pathogenic flavivirus that has resulted in large economic losses to the duck-rearing industry in China since 2010. Therefore, an effective diagnostic approach to monitor the spread of DTMUV is necessary. Here, a novel diagnostic immunochromatographic strip (ICS) assay was developed to detect DTMUV. The assay was carried out using colloidal gold coated with purified monoclonal antibody A12D3 against envelope E protein. Purified polyclonal C12D1 antibodies from BALB/c mice against the envelope E protein were used as the capture antibody. Goat anti-mouse IgG was used to detect DTMUV, which was also assembled on the ICS. Results showed that the ICS could specifically detect DTMUV within 10 min. It also could be stored 25 and 4°C for 4 and 6 months, respectively. The sensitivity of the ICS indicated that the dilution multiples of positive allantoic fluid of DTMUV (LD50: 104.33/0.2 ml) was up to 200. Its specificity and sensibility showed no significant change under the above storage situations. Fifty clinical samples were simultaneously detected by ICS and reverse-transcription polymerase chain reaction with a 93.9% coincidence rate between them. It proved that the ICS in the present study was highly specific, sensitive, repeatable, and more convenient to rapidly detect DTMUV in clinical samples.
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Affiliation(s)
- Guanliu Yu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Xianglong Yu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Guoping Yang
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Yi Tang
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
| | - Youxiang Diao
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, China.,Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, Tai'an, China
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