| Journal: | Brazilian journal of medical and biological research |
| Database: | PERIÓDICA |
| System number: | 000350946 |
| ISSN: | 0100-879X |
| Authors: | Chimeno Zoth, S1 Leunda, M.R2 Odeón, A2 Taboga, O1 |
| Institutions: | 1Instituto Nacional de Tecnología Agropecuaria, Instituto de Biotecnología, Castelar, Buenos Aires. Argentina 2Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Balcarce, Balcarce, Buenos Aires. Brasil |
| Year: | 2007 |
| Season: | Jun |
| Volumen: | 40 |
| Number: | 6 |
| Pages: | 813-818 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Two recombinant baculoviruses were produced in order to obtain a bovine viral diarrhea virus (BVDV) immunogen: AcNPV/E2 expressing E2 glycoprotein, and AcNPV/E0E1E2 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 |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Bovinos, Medicina veterinaria, Virus de la diarrea viral bovina, Glicoproteínas recombinantes, Respuesta inmune |
| Keyword: | Veterinary medicine and animal husbandry, Bovines, Veterinary medicine, Bovine diarrhea virus, Recombinant glycoproteins, Immune response |
| Full text: | Texto completo (Ver HTML) |
