INVESTIGADORES
GIAMBARTOLOMEI Guillermo Hernan
artículos
Título:
A recombinant subunit vaccine based on the insertion of 27 aminoacids from Omp31 to the N-terminus of BLS induced a similar degree of protection against B. ovis than Rev-1 vaccination
Autor/es:
CASSATARO J, PASQUEVICH K. A , ESTEIN S. M. , LAPLAGNE D., VELIKOVSKY C. A., DE LA BARRERA S., BOWDEN R. A., FOSSATI C. A., GIAMBARTOLOMEI G. H., GOLDBAUM F. A.
Revista:
VACCINE
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2007 vol. 25 p. 4437 - 4446
ISSN:
0264-410X
Resumen:
The development of an effective subunit vaccine against brucellosis is a research area of intense interest. The enzyme lumazine synthase from Brucella spp. (BLS) is highly immunogenic, presumably due to its decameric arrangement and remarkable stability. In this work we decided to develop a chimera with the scaffold protein BLS decorated with 10 copies of a known protective epitope derived from an outer membrane protein of 31 kDa (Omp31) from Brucella spp. Vaccination of BALB/c mice with the chimera as a recombinant protein (rBLSOmp31 provided the best protection level against Brucella ovis, which was higher than the given by the co-delivery of both recombinant proteins (rBLS + rOmp31) and similar than the control vaccine Brucella melitensis strain Rev.1. Moreover rBLSOmp31 induced protection against Brucella melitensis but to a lesser degree than Rev.1. The chimera induced a strong humoral response against the inserted peptide. It also induced peptide- and BLS-specific T helper 1 and cytotoxic T responses. In conclusion, our results indicate that BLSOmp31 could be a useful candidate for the development of subunit vaccines against brucellosis since it elicits humoral, T helper and cytotoxic immune responses and protection against smooth and rough species of Brucella.Brucella spp. (BLS) is highly immunogenic, presumably due to its decameric arrangement and remarkable stability. In this work we decided to develop a chimera with the scaffold protein BLS decorated with 10 copies of a known protective epitope derived from an outer membrane protein of 31 kDa (Omp31) from Brucella spp. Vaccination of BALB/c mice with the chimera as a recombinant protein (rBLSOmp31 provided the best protection level against Brucella ovis, which was higher than the given by the co-delivery of both recombinant proteins (rBLS + rOmp31) and similar than the control vaccine Brucella melitensis strain Rev.1. Moreover rBLSOmp31 induced protection against Brucella melitensis but to a lesser degree than Rev.1. The chimera induced a strong humoral response against the inserted peptide. It also induced peptide- and BLS-specific T helper 1 and cytotoxic T responses. In conclusion, our results indicate that BLSOmp31 could be a useful candidate for the development of subunit vaccines against brucellosis since it elicits humoral, T helper and cytotoxic immune responses and protection against smooth and rough species of Brucella.