alexa Immunogenicity of recombinant Escherichia coli expressing the omp31 gene of Brucella melitensis in BALB c mice.
General Science

General Science

Journal of Bioterrorism & Biodefense

Author(s): Guilloteau LA, Laroucau K, Vizcano N, Jacques I, Dubray G

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Abstract BALB/c mice were immunized with recombinant Escherichia coli expressing the omp31 gene of Brucella melitensis, a gene coding for a major outer membrane protein. Immunization resulted in the production of specific antibodies to B. melitensis in the serum, the production of which was considerably increased after boosting with a dose ten times lower than the first. A significant specific proliferative response of immune spleen cells to B. melitensis was observed 5 weeks after the first immunization but this response did not persist. Despite the induction of systemic humoral and cellular immune responses by recombinant E. coli expressing the B. melitensis omp31 gene, no significant protection against a challenge with smooth B. melitensis H38S was observed in immunized mice. These results demonstrate that despite the strong antibody response induced in mice, immunization with the recombinant Omp31 of B. melitensis does not confer any protective effect against a virulent smooth B. melitensis. However, its potential protective effect for protection against rough Brucella would be worth testing.
This article was published in Vaccine and referenced in Journal of Bioterrorism & Biodefense

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