Generation and immunogenicity analysis of recombinant classical swine fever virus glycoprotein E2 and Erns expressed in baculovirus expression system

Classical swine fever (CSF) caused by the classical swine fever virus (CSFV) is a highly contagious swine disease resulting in large economical losses worldwide. The viral envelope glycoprotein E2 and E.sup.rns are major targets for eliciting antibodies against CSFV in infected animals. In this repo...

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Veröffentlicht in:Virology journal 2021-02, Vol.18 (1), p.1-44, Article 44
Hauptverfasser: Wei, Qiang, Bai, Yilin, Song, Yapeng, Liu, Yunchao, Yu, Wei, Sun, Yaning, Wang, Li, Deng, Ruiguang, Xing, Guangxu, Zhang, Gaiping
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container_issue 1
container_start_page 1
container_title Virology journal
container_volume 18
creator Wei, Qiang
Bai, Yilin
Song, Yapeng
Liu, Yunchao
Yu, Wei
Sun, Yaning
Wang, Li
Deng, Ruiguang
Xing, Guangxu
Zhang, Gaiping
description Classical swine fever (CSF) caused by the classical swine fever virus (CSFV) is a highly contagious swine disease resulting in large economical losses worldwide. The viral envelope glycoprotein E2 and E.sup.rns are major targets for eliciting antibodies against CSFV in infected animals. In this report, the glycoprotein E2 and E.sup.rns were expressed using the baculovirus system and their protective immunity in rabbits were tested. Twenty CSFV seronegative rabbits were randomly divided into five groups. Each rabbit was intramuscularly immunized with CSFV-E2, CSFV-E.sup.rns, or their combination (CSFV-E2 + E.sup.rns). Besides, a commercial CSFV vaccine (C-strain) and PBS were used as positive or negative controls, respectively. Four weeks after the second immunization, all the rabbits were challenged with 100 RID.sub.50 of CSFV C-strain. High levels of CSFV E2-specific antibody, neutralizing antibody and cellular immune responses to CSFV were elicited in the rabbits inoculated with C-strain, CSFV-E2, and CSFV-E2 + E.sup.rns. And the rabbits inoculated with the three vaccines received complete protection against CSFV C-strain. However, no neutralizing antibody was detected in the E.sup.rns vaccinated rabbits and the rabbits exhibited fever typical of CSFV, suggesting the E.sup.rns alone is not able to induce a protective immune response. Taken together, while the E.sup.rns could not confer protection against CSFV, E2 and E2 + E.sup.rns could not only elicit humoral and cell-mediated immune responses but also confer complete protection against CSFV C-strain in rabbits.
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The viral envelope glycoprotein E2 and E.sup.rns are major targets for eliciting antibodies against CSFV in infected animals. In this report, the glycoprotein E2 and E.sup.rns were expressed using the baculovirus system and their protective immunity in rabbits were tested. Twenty CSFV seronegative rabbits were randomly divided into five groups. Each rabbit was intramuscularly immunized with CSFV-E2, CSFV-E.sup.rns, or their combination (CSFV-E2 + E.sup.rns). Besides, a commercial CSFV vaccine (C-strain) and PBS were used as positive or negative controls, respectively. Four weeks after the second immunization, all the rabbits were challenged with 100 RID.sub.50 of CSFV C-strain. High levels of CSFV E2-specific antibody, neutralizing antibody and cellular immune responses to CSFV were elicited in the rabbits inoculated with C-strain, CSFV-E2, and CSFV-E2 + E.sup.rns. And the rabbits inoculated with the three vaccines received complete protection against CSFV C-strain. However, no neutralizing antibody was detected in the E.sup.rns vaccinated rabbits and the rabbits exhibited fever typical of CSFV, suggesting the E.sup.rns alone is not able to induce a protective immune response. Taken together, while the E.sup.rns could not confer protection against CSFV, E2 and E2 + E.sup.rns could not only elicit humoral and cell-mediated immune responses but also confer complete protection against CSFV C-strain in rabbits.</description><identifier>ISSN: 1743-422X</identifier><identifier>EISSN: 1743-422X</identifier><identifier>DOI: 10.1186/s12985-021-01507-1</identifier><identifier>PMID: 33627167</identifier><language>eng</language><publisher>London: BioMed Central Ltd</publisher><subject>Antibodies ; Antigens ; Care and treatment ; Chromatography ; Classical swine fever virus ; Cloning ; Development and progression ; Erns ; Fever ; Gene expression ; Genetic aspects ; Glycoprotein E2 ; Glycoproteins ; Health aspects ; Hog cholera ; Host-virus relationships ; Immune response ; Immune response (cell-mediated) ; Immune response (humoral) ; Immunization ; Immunogenicity ; Plasmids ; Proteins ; Rabbits ; Short Report ; Vaccines</subject><ispartof>Virology journal, 2021-02, Vol.18 (1), p.1-44, Article 44</ispartof><rights>COPYRIGHT 2021 BioMed Central Ltd.</rights><rights>2021. 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The viral envelope glycoprotein E2 and E.sup.rns are major targets for eliciting antibodies against CSFV in infected animals. In this report, the glycoprotein E2 and E.sup.rns were expressed using the baculovirus system and their protective immunity in rabbits were tested. Twenty CSFV seronegative rabbits were randomly divided into five groups. Each rabbit was intramuscularly immunized with CSFV-E2, CSFV-E.sup.rns, or their combination (CSFV-E2 + E.sup.rns). Besides, a commercial CSFV vaccine (C-strain) and PBS were used as positive or negative controls, respectively. Four weeks after the second immunization, all the rabbits were challenged with 100 RID.sub.50 of CSFV C-strain. High levels of CSFV E2-specific antibody, neutralizing antibody and cellular immune responses to CSFV were elicited in the rabbits inoculated with C-strain, CSFV-E2, and CSFV-E2 + E.sup.rns. And the rabbits inoculated with the three vaccines received complete protection against CSFV C-strain. However, no neutralizing antibody was detected in the E.sup.rns vaccinated rabbits and the rabbits exhibited fever typical of CSFV, suggesting the E.sup.rns alone is not able to induce a protective immune response. Taken together, while the E.sup.rns could not confer protection against CSFV, E2 and E2 + E.sup.rns could not only elicit humoral and cell-mediated immune responses but also confer complete protection against CSFV C-strain in rabbits.</abstract><cop>London</cop><pub>BioMed Central Ltd</pub><pmid>33627167</pmid><doi>10.1186/s12985-021-01507-1</doi><orcidid>https://orcid.org/0000-0002-1782-874X</orcidid><oa>free_for_read</oa></addata></record>
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subjects Antibodies
Antigens
Care and treatment
Chromatography
Classical swine fever virus
Cloning
Development and progression
Erns
Fever
Gene expression
Genetic aspects
Glycoprotein E2
Glycoproteins
Health aspects
Hog cholera
Host-virus relationships
Immune response
Immune response (cell-mediated)
Immune response (humoral)
Immunization
Immunogenicity
Plasmids
Proteins
Rabbits
Short Report
Vaccines
title Generation and immunogenicity analysis of recombinant classical swine fever virus glycoprotein E2 and Erns expressed in baculovirus expression system
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