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Huang C, Cao C, Xu Z, Lin Y, Wu J, Weng Q, Liu Z, Jin Y, Chen P, Hua Q. A blocking ELISA based on virus-like nanoparticles chimerized with an antigenic epitope of ASFV P54 for detecting ASFV antibodies. Sci Rep 2023; 13:19928. [PMID: 37968284 PMCID: PMC10651890 DOI: 10.1038/s41598-023-47068-x] [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: 04/10/2023] [Accepted: 11/08/2023] [Indexed: 11/17/2023] Open
Abstract
African swine fever virus (ASFV) is a highly lethal pathogen of domestic and wild pigs. Due to no vaccines or drugs available, early accurate diagnosis and eradication of infected animals are the most important measures for ASFV prevention and control. Bluetongue virus (BTV) core-like particles (CLPs) are non-infectious hollow nanoparticles assembled from the BTV VP3 and VP7 proteins, which could be used as a platform for presenting foreign epitopes. In this study, the secondary structure of BTV VP7 protein was analyzed and predicted using the IEDB Analysis resource. Based on the prediction results of the VP7 protein, the chimeric CLPs with an ASFV P54 epitope were successfully prepared through the BAC-to-BAC baculovirus expression system and sucrose gradient centrifugation. Based on the chimeric CLPs and mAb 2E4 against AFSV P54 epitope, a blocking ELISA for detecting AFSV antibodies was established, and its reaction conditions were optimized. Through comprehensive evaluation of the method, the results showed the chimeric CLPs-based blocking ELISA displayed the best detection performance, with an AUC of 0.9961, a sensitivity of 97.65%, and a specificity of 95.24% in ROC analysis. Compared with western blot and a commercial c-ELISA for detecting anti-ASFV antibodies, this method had an excellent agreement of 96.35% (kappa value = 0.911) and 97.76% (kappa value = 0.946) with the other tests, respectively. This ELISA also had high repeatability, with CV < 10%, and no cross-reaction with the serum antibodies against other swine viruses or Orbivirus. In brief, this was the first report on developing a blocking ELISA based on virus-like nanoparticles chimerized with an antigenic epitope of ASFV P54 for serological diagnosis of ASFV.
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Affiliation(s)
- Chaohua Huang
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China
| | - Chenfu Cao
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China
| | - Zhichao Xu
- State Key Laboratory of Biocontrol, School of Life Science, Sun Yat-Sen University, Guangzhou, 510006, People's Republic of China
| | - Yanxing Lin
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China
| | - Jiang Wu
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China
| | - Qiaoyu Weng
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China
| | - Zheng Liu
- Kobilka Institute of Innovative Drug Discovery, School of Medicine, Chinese University of Hong Kong, Shenzhen, 518172, People's Republic of China
| | - Ye Jin
- Hu Nan Project Bioscience LTD, Changsha, 410137, People's Republic of China
| | - Peng Chen
- Shenzhen Biolove Technology CO., LTD., Shenzhen, 518110, People's Republic of China
| | - Qunyi Hua
- Animal and Plant Inspection and Quarantine Center of Shenzhen Customs, Shenzhen, 518045, People's Republic of China.
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Rudenko NV, Karatovskaya AP, Zamyatina AV, Malogolovkin AS, Oleinikov VA, Brovko FA, Kol’tsov AU, Lapteva OG, Kolbasov DV, Shepelyakovskaya AO. Bluetongue Virus Detection Using Microspheres Conjugated with Monoclonal Antibodies against Group-Specific Protein Vp7 by Flow Virometry. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1068162022040173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rudenko NV, Karatovskaya AP, Shepelyakovskaya AO, Zamyatina AV, Brovko FA, Koltsov AY, Imatdinov IR, Imatdinov AR, Strijakova OM, Mima KA, Lyska VM, Kolbasov DV. Monoclonal Antibodies to the Recombinant Protein VP7 of Bluetongue Virus. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162019060347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Analysis of the three-dimensional structure of the African horse sickness virus VP7 trimer by homology modelling. Virus Res 2017; 232:80-95. [DOI: 10.1016/j.virusres.2017.02.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 01/27/2017] [Accepted: 02/02/2017] [Indexed: 01/21/2023]
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5
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Isolation of a Bluetongue virus group-specific monoclonal antibody and application to a diagnostic competitive ELISA. Appl Microbiol Biotechnol 2014; 99:729-39. [DOI: 10.1007/s00253-014-5937-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/03/2014] [Accepted: 07/05/2014] [Indexed: 10/25/2022]
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Li JKK. Oncolytic bluetongue viruses: promise, progress, and perspectives. Front Microbiol 2011; 2:46. [PMID: 21747785 PMCID: PMC3128942 DOI: 10.3389/fmicb.2011.00046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Accepted: 03/01/2011] [Indexed: 11/26/2022] Open
Abstract
Humans are sero-negative toward bluetongue viruses (BTVs) since BTVs do not infect normal human cells. Infection and selective degradation of several human cancer cell lines but not normal ones by five US BTV serotypes have been investigated. We determined the susceptibilities of many normal and human cancer cells to BTV infections and made comparative kinetic analyses of their cytopathic effects, survival rates, ultra-structural changes, cellular apoptosis and necrosis, cell cycle arrest, cytokine profiles, viral genome, mRNAs, and progeny titers. The wild-type US BTVs, without any genetic modifications, could preferentially infect and degrade several types of human cancer cells but not normal cells. Their selective and preferential BTV-degradation of human cancer cells is viral dose–dependent, leading to effective viral replication, and induced apoptosis. Xenograft tumors in mice were substantially reduced by a single intratumoral BTV injection in initial in vivo experiments. Thus, wild-type BTVs, without genetic modifications, have oncolytic potentials. They represent an attractive, next generation of oncolytic viral approach for potential human cancer therapy combined with current anti-cancer agents and irradiation.
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Affiliation(s)
- Joseph K-K Li
- Department of Biology, Utah State University Logan, UT, USA
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Lee F, Chen JL, Lin CM, Wang FI. Presence of bluetongue virus in the marginal zone of the spleen in acute infected sheep. Vet Microbiol 2011; 152:96-100. [PMID: 21571450 DOI: 10.1016/j.vetmic.2011.04.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 04/08/2011] [Accepted: 04/14/2011] [Indexed: 10/18/2022]
Abstract
Bluetongue virus, a member of the genus Orbivirus of the family Reoviridae, is the causative agent of bluetongue, which is a non-contagious Culicoides mediated blood-borne disease. The present study characterizes the pathogenicity of a Taiwan prototype BTV2/KM/2003 in Corriedale sheep inoculated subcutaneously into the ear pinna. Histologically, multifocal petechiated hemorrhage, with mild to moderate inflammation and edema, were present in the contralateral ear pinna, tongue, and facial skin, without remarkable lesions in lymphoid organs. By days post-infection (DPI) 7, viral VP7 antigen, detected by immunohistochemistry, presented in the spleen, chiefly located in the outer rim of <3 cell thickness of marginal zone macrophages bordering the marginal zone and red pulp, and T lymphocytes of the red pulp. By DPI 11, viral signals shifted from the marginal zone to macrophages and small lymphocytes within follicles of the spleen. In situ hybridization with VP7 gene probe detected strong signals in the spleen, chiefly spanning the whole width of 5-10 cell thickness of the marginal zone, including the marginal zone macrophages and marginal zone B cells, as well as macrophages of sheathed capillaries in the red pulp. This study demonstrates molecular as well as morphologic evidence of the presence of bluetongue virus in the marginal zone of the spleen, most likely associated with viremia in acute infection, as previously demonstrated by the authors.
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Affiliation(s)
- Fan Lee
- School of Veterinary Medicine, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
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Hosamani M, Shimizu S, Hirota J, Kokuho T, Kubota T, Watanabe S, Ohta M, Muneta Y, Inumaru S. Expression and characterization of bluetongue virus serotype 21 VP7 antigen: C-terminal truncated protein has significantly reduced antigenicity. J Vet Med Sci 2010; 73:609-13. [PMID: 21187684 DOI: 10.1292/jvms.10-0213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In the present study, group-specific antigen VP7 of bluetongue virus (BTV) serotype 21 isolated from cattle in Tochigi prefecture in Japan in 1994 was characterized by sequencing and expression. Gene was amplified from cDNA synthesized on viral dsRNA using reverse-transcriptase-PCR. Nucleotide sequence of this isolate showed high similarity with other published BTV VP7 sequences. Full-length and C-terminal truncated forms of VP7 were expressed in insect cells by a baculovirus gene expression system under control of the viral polyhedrin promoter. Expression of full-length recombinant VP7 was confirmed by immunoprecipitation with VP7 specific monoclonal antibody (8A3B.6, ATCC). Recombinant proteins expressed with or without 6x His-tag showed good expression levels in TN5 cells and reacted well with the monoclonal antibody in the indirect ELISA. However C-terminal truncated VP7 with His-tag failed to react with this monoclonal antibody, while poor antigenicity was evident when it was reacted with infected bovine serum. Reduced antigenicity of the latter suggested that C-terminal truncation affects 8A3B.6 epitope construction probably via inhibition of VP7 trimer structure formation.
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Affiliation(s)
- Madhusudan Hosamani
- National Institute of Animal Health, 3–1–5 Kan-non-dai, Tsukuba, Ibaraki 305–0856, Japan
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Yamakawa M, Furuuchi S. Expression and antigenic characterization of the major core protein VP7 of Chuzan virus, a member of the Palyam serogroup orbiviruses. Vet Microbiol 2001; 83:333-41. [PMID: 11600267 DOI: 10.1016/s0378-1135(01)00432-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The Palyam serogroup-specific antigen, VP7, of Chuzan virus strain K-47 was expressed in insect cells by a recombinant baculovirus. The expressed protein appeared as a single band of 38kDa corresponding to the predicted molecular mass of Chuzan virus VP7 by SDS-polyacrylamide gel electrophoresis (SDS-PAGE). In immunoprecipitation analysis, the recombinant VP7 was not only recognized by all polyclonal antibodies against the Palyam serogroup viruses (PALV) tested in this study, but also by antisera to bluetongue virus (BTV) serotype 1, epizootic haemorrhagic disease virus (EHDV) serotypes 1 and 2. However, in Western immunoblot assay, no positive signals were observed between this protein and these antisera, even in the homologous reaction using antiserum to Chuzan virus. These findings demonstrate that the common antigenic determinants on the VP7 proteins of Chuzan virus and the other PALV serotypes are mainly conformational and that the proteins share some epitopes with those of BTV and EHDV beyond the serogroup. No cross-reactivities were detected between Chuzan virus VP7 and antisera to BTV and EHDV in agar gel immunodiffusion (AGID) and indirect ELISA tests, indicating that the recombinant VP7 is useful as a diagnostic reagent for serological tests of congenital abnormalities of cattle caused by PALV.
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Affiliation(s)
- M Yamakawa
- Department of Exotic Diseases, National Institute of Animal Health, 6-20-1, Josuihoncho, Kodaira, Tokyo 187-0022, Japan.
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Zheng YZ, Greenfield PF, Reid S. Optimized production of recombinant bluetongue core-like particles produced by the baculovirus expression system. Biotechnol Bioeng 1999; 65:600-4. [PMID: 10516586 DOI: 10.1002/(sici)1097-0290(19991205)65:5<600::aid-bit13>3.0.co;2-k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The baculovirus-expression vector system (BEVS) has been widely used for the experimental production of many human and animal single- and multi-unit vaccines, heterologous proteins, and viral insecticides. In this work, the production of recombinant bluetongue virus core-like particles (CLPs), using Sf9 cells in shaker-suspension culture with the SF900 II medium (GIBCO, NY), has been studied. This system involved the simultaneous production of two proteins, VP7 and VP3, and was shown to achieve high volumetric productivities. The key parameters of the time of infection (TOI), and the multiplicity of infection (MOI) were studied. The results show that the peak-volumetric yields and cell-specific yields achieved using low MOIs at low-cell densities were the same as those obtained following infections with a high MOI at high-cell densities. This work establishes the feasibility of using low MOIs in the baculovirus system to produce complex multiprotein particles.
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Affiliation(s)
- Y Z Zheng
- Department of Chemical Engineering, The University of Queensland, QLD, 4072, Australia.
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Zheng YZ, Hyatt A, Wang LF, Eaton BT, Greenfield PF, Reid S. Quantification of recombinant core-like particles of bluetongue virus using immunosorbent electron microscopy. J Virol Methods 1999; 80:1-9. [PMID: 10403670 PMCID: PMC7173279 DOI: 10.1016/s0166-0934(98)00170-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Immunosorbent electron microscopy was used to quantify recombinant baculovirus-generated bluetongue virus (BTV) core-like particles (CLP) in either purified preparations or lysates of recombinant baculovirus-infected cells. The capture antibody was an anti-BTV VP7 monoclonal antibody. The CLP concentration in purified preparations was determined to be 6.6 x 10(15) particles/l. CLP concentration in lysates of recombinant baculovirus-infected cells was determined at various times post-infection and shown to reach a value of 3 x 10(15) particles/l of culture medium at 96 h post-infection. The results indicated that immunosorbent electron microscopy, aided by an improved particle counting method, is a simple, rapid and accurate technique for the quantification of virus and virus-like particles produced in large scale in vitro systems.
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Affiliation(s)
- Y Z Zheng
- Department of Chemical Engineering, The University of Queensland, Australia.
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