New malaria vaccine candidates based on the Plasmodium vivax Merozoite Surface Protein-1 and the TLR-5 agonist Salmonella Typhimurium FliC flagellin
| Autor: | Fabio T. M. Costa, Irene S. Soares, Noeli Maria Espíndola, Mauricio M. Rodrigues, Bruna O. Carvalho, Daniel Y. Bargieri, Catarina J.M. Braga, Luís Carlos de Souza Ferreira, Adelaide José Vaz, Daniela Santoro Rosa |
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| Rok vydání: | 2008 |
| Předmět: |
Agonist
Salmonella typhimurium medicine.drug_class medicine.medical_treatment Chemistry Pharmaceutical Injections Subcutaneous Plasmodium vivax Biology Microbiology Mice Th2 Cells Antigen Adjuvants Immunologic parasitic diseases Malaria Vaccines medicine Animals Fluorescent Antibody Technique Indirect Administration Intranasal Immunization Schedule Merozoite Surface Protein 1 Vaccines Synthetic General Veterinary General Immunology and Microbiology Malaria vaccine Immunogenicity Public Health Environmental and Occupational Health Antibodies Monoclonal Th1 Cells biology.organism_classification Virology Mice Inbred C57BL Toll-Like Receptor 5 Infectious Diseases TLR5 biology.protein bacteria Molecular Medicine Female Adjuvant Flagellin |
| Zdroj: | Vaccine. 26(48) |
| ISSN: | 0264-410X |
| Popis: | The present study evaluated the immunogenicity of new malaria vaccine formulations based on the 19kDa C-terminal fragment of Plasmodium vivax Merozoite Surface Protein-1 (MSP1(19)) and the Salmonella enterica serovar Typhimurium flagellin (FliC), a Toll-like receptor 5 (TLR5) agonist. FliC was used as an adjuvant either admixed or genetically linked to the P. vivax MSP1(19) and administered to C57BL/6 mice via parenteral (s.c.) or mucosal (i.n.) routes. The recombinant fusion protein preserved MSP1(19) epitopes recognized by sera collected from P. vivax infected humans and TLR5 agonist activity. Mice parenterally immunized with recombinant P. vivax MSP1(19) in the presence of FliC, either admixed or genetically linked, elicited strong and long-lasting MSP1(19)-specific systemic antibody responses with a prevailing IgG1 subclass response. Incorporation of another TLR agonist, CpG ODN 1826, resulted in a more balanced response, as evaluated by the IgG1/IgG2c ratio, and higher cell-mediated immune response measured by interferon-gamma secretion. Finally, we show that MSP1(19)-specific antibodies recognized the native protein expressed on the surface of P. vivax parasites harvested from infected humans. The present report proposes a new class of malaria vaccine formulation based on the use of malarial antigens and the innate immunity agonist FliC. It contains intrinsic adjuvant properties and enhanced ability to induce specific humoral and cellular immune responses when administered alone or in combination with other adjuvants. |
| Databáze: | OpenAIRE |
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