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Tomé-Poderti L, Olivero-Deibe N, Carrión F, Portela MM, Obal G, Cabrera G, Bianchi S, Lima A, Addiego A, Durán R, Moratorio G, Pritsch O. Characterization and application of recombinant Bovine Leukemia Virus Env protein. Sci Rep 2024; 14:12190. [PMID: 38806566 PMCID: PMC11133380 DOI: 10.1038/s41598-024-62811-8] [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: 02/20/2024] [Accepted: 05/21/2024] [Indexed: 05/30/2024] Open
Abstract
The Bovine Leukemia Virus (BLV) Envelope (Env) glycoprotein complex is instrumental in viral infectivity and shapes the host's immune response. This study presents the production and characterization of a soluble furin-mutated BLV Env ectodomain (sBLV-EnvFm) expressed in a stable S2 insect cell line. We purified a 63 kDa soluble protein, corresponding to the monomeric sBLV-EnvFm, which predominantly presented oligomannose and paucimannose N-glycans, with a high content of core fucose structures. Our results demonstrate that our recombinant protein can be recognized from specific antibodies in BLV infected cattle, suggesting its potential as a powerful diagnostic tool. Moreover, the robust humoral immune response it elicited in mice shows its potential contribution to the development of subunit-based vaccines against BLV.
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Affiliation(s)
- Lorena Tomé-Poderti
- Immunovirology Lab, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay.
- Morphogenesis and Antigenicity of HIV and Hepatitis Viruses (MAVIVH), INSERM Unit 1259, Université de Tours and CHRU de Tours, Tours, France.
| | | | - Federico Carrión
- Immunovirology Lab, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - María Magdalena Portela
- Analytical Biochemistry and Proteomics Unit, Instituto de Investigaciones Biológicas Clemente Estable/Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
- Facultad de Ciencias, Universidad de la República, 11400, Montevideo, Uruguay
| | - Gonzalo Obal
- Immunovirology Lab, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Gleysin Cabrera
- Analytical Biochemistry and Proteomics Unit, Instituto de Investigaciones Biológicas Clemente Estable/Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Sergio Bianchi
- Laboratory of Molecular Biomarkers, Department of Physiopathology, University Hospital, Universidad de la República, 11600, Montevideo, Uruguay
- Functional Genomics Unit, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Analia Lima
- Analytical Biochemistry and Proteomics Unit, Instituto de Investigaciones Biológicas Clemente Estable/Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Andrés Addiego
- Immunovirology Lab, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Rosario Durán
- Analytical Biochemistry and Proteomics Unit, Instituto de Investigaciones Biológicas Clemente Estable/Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
| | - Gonzalo Moratorio
- Experimental Evolution of Viruses, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
- Laboratorio de Virología Molecular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Otto Pritsch
- Immunovirology Lab, Institut Pasteur de Montevideo, 11400, Montevideo, Uruguay
- Immunobiology Department School of Medicine, Universidad de la República, 11800, Montevideo, Uruguay
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Larsen A, Gonzalez ET, Serena MS, Echeverría MG, Mortola E. Expression of p24 gag Protein of Bovine Leukemia Virus in Insect Cells and Its Use in Immunodetection of the Disease. Mol Biotechnol 2012; 54:475-83. [DOI: 10.1007/s12033-012-9587-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Starodub NF, Pirogova LV, Demchenko A, Nabok AV. Antibody immobilisation on the metal and silicon surfaces. The use of self-assembled layers and specific receptors. Bioelectrochemistry 2005; 66:111-5. [PMID: 15833710 DOI: 10.1016/j.bioelechem.2004.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2003] [Revised: 04/15/2004] [Accepted: 04/27/2004] [Indexed: 10/26/2022]
Abstract
The use of Staphylococcal protein A and lectins as intermediate immobilising agents allows operators to orient antibodies (Ab) towards the solution due to the presence of a specific binding sites of immunoglobulin (Ig) molecules. Antibodies of different species of animals have unequal affinities to individual lectins. The effective thickness of immobilised Ab's depends on the type of substrates used and increases in the following sequence: bare gold or silicon surface, the surface treated with self-assembled polyelectrolytes (PESA) or with protein A or some lectins deposited on the preliminary formed polyelectrolyte layer. The glycolysated protein of jp51 may be selectively immobilised from the mixture of retroviral proteins (p24 and jp51), if it is necessary to distinguish infected animals from preliminarily immunised ones by means of a vaccine based on p24 protein. It was shown that the use of Staphylococcal protein A, instead of some lectins as intermediate layer for the Ab immobilisation, does not lead to a more sensitive determination of such low-weight toxins as 2,4-dichlorophenoxyacetic acid (2,4-D). The above-mentioned results were obtained with surface plasmon resonance (SPR) technique.
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Affiliation(s)
- N F Starodub
- Department of Biochemistry of Sensory and Regulatory Systems, A.V. Palladin Institute of Biochemistry, Ukrainian National Academy of Sciences, 9 Leontovicha Str., 01030 Kiev 30, Ukraine.
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De Giuseppe A, Feliziani F, Rutili D, De Mia GM. Expression of the bovine leukemia virus envelope glycoprotein (gp51) by recombinant baculovirus and its use in an enzyme-linked immunosorbent assay. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 2004; 11:147-51. [PMID: 14715562 PMCID: PMC321346 DOI: 10.1128/cdli.11.1.147-151.2004] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The gene encoding the major envelope glycoprotein (gp51) with its signal sequence, represented by an additional NH2-terminal 33-residue amino acid sequence of bovine leukemia virus (BLV), was inserted into a baculovirus transfer vector. A recombinant virus expressing a secreted gp51 protein in insect cells was isolated. The recombinant gp51 expressed was characterized by using an anti-BLV monoclonal antibody by both Western blotting analysis and enzyme-linked immunosorbent assay (ELISA). The secreted gp51 was used as an antigen, and an ELISA with recombinant gp51 (rgp51) was developed for the detection of BLV antibodies. This new procedure was compared with a previous ELISA method for the detection of BLV antibodies and an agar gel immunodiffusion test performed with an unpurified BLV antigen preparation. The comparative testing of field samples showed that the ELISA with rgp51 is more specific and also suitable for the testing of pooled sera.
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Affiliation(s)
- Antonio De Giuseppe
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, 06126 Perugia, Italy
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5
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Affiliation(s)
- N. F. Starodub
- Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine
| | - V. M. Starodub
- Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine
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Kittelberger R, Reichel MP, Meynell RM, Tham KM, Molloy JB. Detection of antibodies against the core protein p24 of the bovine leukaemia virus in cattle for confirmatory serological testing. J Virol Methods 1999; 77:109-14. [PMID: 10029331 DOI: 10.1016/s0166-0934(98)00143-8] [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: 11/23/2022]
Abstract
An electrophoretic immunoblotting technique which was developed recently was evaluated for the identification of serum antibodies against the bovine leukaemia virus core protein p24 by using 167 sera from a bovine leukaemia virus-negative herd, and 144 sera from herds naturally infected with the virus. The sensitivity of the immunoblot was 97.4%, relative to sera which were positive in the polymerase chain reaction and in a commercial EBL-ELISA. The specificity of the immunoblot was 99.4%, for the sera from a cattle herd in which all animals were negative by a commercial EBL-ELISA, and it was 96.7% relative to sera which were negative by the polymerase chain reaction and by the agar gel immunodiffusion test from bovine leukaemia virus-infected cattle herds. A p24-specific ELISA was developed, using a monoclonal anti-p24 antibody for coating microtitre plates, a crude antigen preparation, and a monoclonal anti-bovine IgG-horse radish peroxidase conjugate as components. All reagents were commercially available. While the p24-ELISA worked well with sera from serial bleeds from calves infected experimentally with the bovine leukaemia virus and its sensitivity with sera from the naturally-infected cattle was 96.5%, its specificity was relatively low at 85.0 or 53.3%, respectively for the two negative sera groups.
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Affiliation(s)
- R Kittelberger
- Central Animal Health Laboratory Wallaceville, Upper Hutt, New Zealand.
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Russo S, Montermini L, Berkovitz-Siman-Tov R, Ponti W, Poli G. Expression of bovine leukemia virus ENV glycoprotein in insect cells by recombinant baculovirus. FEBS Lett 1998; 436:11-6. [PMID: 9771885 DOI: 10.1016/s0014-5793(98)00951-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The gp51-p30 glycoprotein constituting BLV envelope was expressed in Sf-21 insect cells by means of recombinant baculoviruses. Post-infection cell lysates were analyzed, in order to define the immunologic reactivity of recombinant products. Oligosaccharide chains, containing N-acetylglucosamine, mannose, galactose and sialic acid were found on recombinant gp51-p30. In order to investigate the timing of transcription and translation of the glycoprotein, kinetic assays were carried out on cell lysates and directly in situ on Sf-21 cells during the course of baculovirus infection. The use of different solubilizing reagents was also evaluated in order to rescue recombinant glycoprotein from its subcellular location.
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Affiliation(s)
- S Russo
- Institute of Microbiology and Immunology, Faculty of Veterinary Medicine, Milan, Italy
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Affiliation(s)
- S Russo
- Institute of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Milan, Italy
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Kittelberger R, Laybourn BJ, Diack DS, Penrose ME, Reichel MP, Motha J, Molloy JB, Merza M. Evaluation of electrophoretic immunoblotting for the detection of antibodies against the bovine leukosis virus in cattle. J Virol Methods 1996; 61:7-22. [PMID: 8882933 DOI: 10.1016/0166-0934(96)02065-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Six antigen preparations of bovine leukemia virus, including affinity-purified glycoprotein gp51, gradient-purified fetal lamb kidney-bovine leukemia virus antigen, and four crude antigens, were used in combination with several groups of cattle sera, for the evaluation of electrophoretic immunoblotting as a serological test method. Sera (89) from cattle naturally-infected with bovine leukosis virus, a panel of reference sera from infected and uninfected cattle (18), and serial bleedings from experimentally-infected cows (4) were used. Major differences between the six antigen preparations were observed in their reactivity with the various sera. The immunological variabilities of these antigens were confirmed further by their reactions with a gp51-specific monoclonal antibody. The known immunodominant gp51 failed as a reliable indicator for the serological status of the sera in blots when compared to the results on the same sera, two gp51-specific ELISAs and the agar gel immunodiffusion test were used as reference tests. There was a lack of staining of gp51 antigen by many sera, probably due to the labile nature of the gp51 molecule. On the other hand, non-specific staining in the gp51 region appeared with high frequency in some antigens. Antibody staining of the internal viral protein p24 correlated well with the results of the three reference tests. Other bands stained infrequently and were of no diagnostic value.
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Affiliation(s)
- R Kittelberger
- Central Animal Health Laboratory, Wallaceville Animal Research Centre, Upper Hutt, New Zealand
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Merza M, Söber J, Sundquist B, Toots I, Morein B. Characterization of purified gp 51 from bovine leukemia virus integrated into iscom. Physicochemical properties and serum antibody response to the integrated gp51. Arch Virol 1991; 120:219-31. [PMID: 1720302 DOI: 10.1007/bf01310477] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
It is proposed that the envelope glycoprotein, gp 51, is the protective antigen of bovine leukemia virus (BLV). An experimental iscom vaccine has been prepared from immunoaffinity purified gp 51. To overcome the problem of integrating a nonamphipathic protein, gp 51 was partially denatured at pH 2.4 before integration into the iscom. The recovery of gp 51 into the iscom was calculated to be 85%. The gp 51 incorporated into iscom retained its physicochemical properties and the neutralizing epitopes F, G and H were found to be intact. The iscom preparation was shown to induce a specific immune response to gp 51 after inoculation into mice and calves, as tested by ELISA and Western blotting. Sera from the immunized calves specifically inhibited the VSV-(BLV) pseudotypes. Thus the gp 51-iscom preparations appear to be highly immunogenic and to induce a gp 51 specific response.
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Affiliation(s)
- M Merza
- Department of Veterinary Microbiology, Swedish University of Agricultural Sciences, Uppsala
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