Immunogenicity of a recombinant Mycobacterium bovis bacille Calmette-Guèrin expressing malarial and tuberculosis epitopes.
Recombinant Mycobacterium bovis bacille Calmette-Guèrin (rBCG) expressing the malarial epitopes F2R(II)EBA and (NANP)3 as well as two T cell epitopes of the M. tuberculosis ESAT-6 antigen, generated in favour of mycobacterium codon usage elicited specific immune response against these epitopes. Immunised Balb/c mice demonstrated an increase in almost all of the IgG subclasses against both malarial epitopes and enhanced splenocyte proliferative response against the malarial epitopes as well as selected peptides of ESAT-6. Furthermore, flow cytometric analyses showed elevated numbers of CD4+ lymphocytes expressing IFN-gamma and IL-2 against the ESAT-6 peptides, suggesting a specific Th1-mediated response. This study demonstrated that expressing malarial and TB epitopes in a single rBCG construct induced appropriate humoral and cellular immune response against immunogenic epitopes from both organisms.
Rapeah
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School of Health Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
Norazmi
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D000595:Amino Acid Sequence; D000818:Animals; D000942:Antigens, Bacterial / Q000276:immunology; D001500:BCG Vaccine / Q000276:immunology*; D001426:Bacterial Proteins; D002352:Carrier Proteins / Q000235:genetics / Q000276:immunology*; D016207:Cytokines / Q000096:biosynthesis; D018984:Epitopes, T-Lymphocyte; D007114:Immunization; D007074:Immunoglobulin G / Q000097:blood / Q000145:classification; D047908:Intracellular Signaling Peptides and Proteins; D008213:Lymphocyte Activation; D017780:Malaria Vaccines / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000235:genetics / Q000276:immunology*; D015800:Protozoan Proteins / Q000235:genetics / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000276:immunology*
D000942:Antigens, Bacterial; D001500:BCG Vaccine; D001426:Bacterial Proteins; D002352:Carrier Proteins; D016207:Cytokines; C505462:EBA-175II F2 protein, Plasmodium falciparum; C093276:ESAT-6 protein, Mycobacterium tuberculosis; D018984:Epitopes, T-Lymphocyte; D007074:Immunoglobulin G; D047908:Intracellular Signaling Peptides and Proteins; D017780:Malaria Vaccines; D009842:Oligopeptides; D015800:Protozoan Proteins; D014614:Vaccines, Synthetic; C052953:(asparaginyl-alanyl-asparaginyl-proline)3