Lipoprotein NMB0928 fromNeisseria meningitidisserogroup B as a novel vaccine candidate

Polysaccharide-based vaccines for serogroup BNeisseria meningitidishave failed to induce protective immunity. As a result, efforts to develop vaccines for serogroup B meningococcal disease have mostly focused on outer membrane proteins (OMP). Vaccine candidates based on meningococcal OMP have emerge...

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Bibliographic Details
Published in:Vaccine 2007-12, Vol.25 (50), p.8420
Main Authors: Delgado, Maité, Yero, Daniel, Niebla, Olivia, González, Sonia, Climent, Yanet, Pérez, Yusleydis, Cobas, Karem, Caballero, Evelín, García, Darien, Pajón, Rolando
Format: Article
Language:English
Subjects:
Antigens
Bacteriology
Candidates
Cell adhesion & migration
Deoxyribonucleic acid
DNA
E coli
Gene amplification
Genomes
Immunization
Immunogenicity
Mass spectrometry
Meningitis
Mortality
Proteins
Studies
Vaccines
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Summary:Polysaccharide-based vaccines for serogroup BNeisseria meningitidishave failed to induce protective immunity. As a result, efforts to develop vaccines for serogroup B meningococcal disease have mostly focused on outer membrane proteins (OMP). Vaccine candidates based on meningococcal OMP have emerged in the form of outer membrane vesicles (OMVs) or, more recently, purified recombinant proteins, as alternative strategies for serogroup B vaccine development. In our group, the protein composition of the Cuban OMVs-based vaccine VA-MENGOC-BC®was elucidated using two-dimensional gel electrophoresis and mass spectrometry. The proteomic map of this product allowed the identification of new putative protective proteins not previously reported as components of an antimeningococcal vaccine. In the present study, we have determined the immunogenicity and protective capacity of NMB0928, one of those proteins present in the OMVs. The antigen was obtained as a recombinant protein inEscherichia coli, purified and used to immunize mice. The antiserum produced against the protein was capable to recognize the natural protein in different meningococcal strains by whole-cell ELISA and Western blotting. After immunization, recombinant NMB0928 induced bactericidal antibodies, and when the protein was administered inserted into liposomes, the elicited antibodies were protective in the infant rat model. These results suggest that NMB0928 is a novel antigen worth to be included in a broadly protective meningococcal vaccine.
ISSN:0264-410X
1873-2518
DOI:10.1016/j.vaccine.2007.09.053