Prediction of T cell epitopes of Brucella abortus and evaluation of their protective role in mice
| Autor: | Subodh Kumar, G. B. K. S. Prasad, Sudhir K. Dohre, Prachiti Afley |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
T cell
Brucella Vaccine Brucella abortus Epitopes T-Lymphocyte Biology Applied Microbiology and Biotechnology Brucellosis Epitope Microbiology DNA vaccination Interferon-gamma Mice Polylactic Acid-Polyglycolic Acid Copolymer In vivo Vaccines DNA medicine Splenocyte Animals Humans Interferon gamma Lactic Acid Cell Proliferation Drug Carriers Mice Inbred BALB C Electroporation Immunogenicity Computational Biology General Medicine Virology medicine.anatomical_structure Vaccines Subunit Leukocytes Mononuclear Polyglycolic Acid Biotechnology medicine.drug |
| Zdroj: | Applied Microbiology and Biotechnology. 99:7625-7637 |
| ISSN: | 1432-0614 0175-7598 |
| DOI: | 10.1007/s00253-015-6787-7 |
| Popis: | Brucellae are Gram-negative intracellular bacteria that cause an important zoonotic disease called brucellosis. The animal vaccines are available but have disadvantage of causing abortions in a proportion of pregnant animals. The animal vaccines are also pathogenic to humans. Recent trend in vaccine design has shifted to epitope-based vaccines that are safe and specific. In this study, efforts were made to identify MHC-I- and MHC-II-restricted T cell epitopes of Brucella abortus and evaluate their vaccine potential in mice. The peptides were designed using online available immunoinformatics tools, and five MHC-I- and one MHC-II-restricted T cell peptides were selected on the basis of their ability to produce interferon gamma (IFN-γ) in in vivo studies. The selected peptides were co-administered with poly DL-lactide-co-glycolide (PLG) microparticles and evaluated for immunogenicity and protection in BALB/c mice. Mice immunized with peptides either entrapped in PLG microparticles (EPLG-Pep) or adsorbed on PLG particles (APLG-Pep) showed significantly higher splenocyte proliferation and IFN-γ generation to all selected peptides than the mice immunized with corresponding irrelevant peptides formulated PLG microparticles or phosphate-buffered saline (PBS). A significant protection compared to PBS control was also observed in EPLG-Pep and APLG-Pep groups. A plasmid DNA vaccine construct (pVaxPep) for peptides encoding DNA sequences was generated and injected to mice by in vivo electroporation. Significant protection was observed (1.66 protection units) when compared with PBS and empty vector control group animals. Overall, the MHC-I and MHC-II peptides identified in this study are immunogenic and protective in mouse model and support the feasibility of peptide-based vaccine for brucellosis. |
| Databáze: | OpenAIRE |
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