Recombinant E2 glycoprotein of bovine viral diarrhea virus induces a solid humoral neutralizing immune response but fails to confer total protection in cattle
Brazilian Journal of Medical and Biological Research, ISSN: 1414-431X, Vol: 40, Issue: 6, Page: 813-818
2007
- 12Citations
- 7,980Usage
- 35Captures
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Metrics Details
- Citations12
- Citation Indexes12
- 12
- CrossRef5
- Scielo1
- Usage7,980
- Full Text Views7,414
- 7,414
- Abstract Views566
- 566
- Captures35
- Readers35
- 35
Article Description
Two recombinant baculoviruses were produced in order to obtain a bovine viral diarrhea virus (BVDV) immunogen: AcNPV/E2 expressing E2 glycoprotein, and AcNPV/EOE1E2 expressing the polyprotein region coding for the three structural proteins of BVDV (E0, E1, and E2). Mice were immunized with Sf9 cells infected with the recombinant baculoviruses in a water in oil formulation and the production of neutralizing antibodies was evaluated. Since E2 elicited higher neutralizing antibody titers than E0-E1-E2 polyprotein, it was selected to immunize cattle. Calves received two doses of recombinant E2 vaccine and were challenged with homologous BVDV 37 days later. The recombinant immunogen induced neutralizing titers which showed a mean value of 1.5 ± 0.27 on the day of challenge and reached a top value of 3.36 ± 0.36, 47 days later (84 days post-vaccination). On the other hand, sera from animals which received mock-infected Sf9 cells did not show neutralizing activity until 25 days post-challenge (62 days post-vaccination), suggesting that these antibodies were produced as a consequence of BVDV challenge. Even when no total protection was observed in cattle, in vitro viral neutralization assays revealed that the recombinant immunogen was able to induce neutralizing antibody synthesis against the homologous strain as well as against heterologous strains in a very efficient way.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34347354207&origin=inward; http://dx.doi.org/10.1590/s0100-879x2007000600010; http://www.ncbi.nlm.nih.gov/pubmed/17581680; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600010&lng=en&tlng=en; http://www.scielo.br/pdf/bjmbr/v40n6/6626.pdf; http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-879X2007000600010&lng=en&tlng=en; http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600010; http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-879X2007000600010; https://dx.doi.org/10.1590/s0100-879x2007000600010; https://www.scielo.br/j/bjmbr/a/9JLjYRKdxpLWFKLbTVmhDnG/?lang=en
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