Chimeric protein consisting of 3M2e and HSP as a universal influenza vaccine candidate: from in silico analysis to preliminary evaluation
| Autor: | Najmeh Taheri, Behrokh Farahmand, Fatemeh Fotouhi, Hoorieh Soleimanjahi, Hadiseh Shokouhi |
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| Rok vydání: | 2018 |
| Předmět: |
Influenza vaccine
Protein subunit Recombinant Fusion Proteins Gene Expression Peptide Biology Antibodies Viral Epitope Viral Matrix Proteins 03 medical and health sciences Epitopes Mice Structure-Activity Relationship Immunogenicity Vaccine Virology Databases Genetic Influenza Human Genetics Animals Humans Amino Acid Sequence Molecular Biology Peptide sequence Heat-Shock Proteins 030304 developmental biology chemistry.chemical_classification 0303 health sciences 030306 microbiology Immunogenicity Reproducibility of Results General Medicine Fusion protein Ectodomain chemistry Influenza Vaccines Female |
| Zdroj: | Virus genes. 55(1) |
| ISSN: | 1572-994X |
| Popis: | The 23-amino acid ectodomain of influenza virus M2 protein (M2e) is highly conserved among human influenza virus variants and represents an attractive target for developing a universal vaccine. Although this peptide has limited potency and low immunogenicity, the degree of M2e density has been shown to be a critical factor influencing the magnitude of epitope-specific responses. The aim of this study was to design a chimer protein consisting of three tandem repeats of M2e peptide sequence fused to the Leishmania major HSP70 gene and evaluate its characteristics and immunogenicity. The structure of the deduced protein and its stability, aliphatic index, biocomputed half-life and the anticipated immunogenicity were analyzed by bioinformatics software. The oligonucleotides encoding 3M2e and chimer 3M2e-HSP70 were expressed in Escherichia coli and affinity purified. The immunogenicity of the purified recombinant proteins was preliminary examined in mouse model. It was predicted that fusion of HSP70 to the C-terminal of 3M2e peptide led to increased stability, hydropathicity, continuous B cell epitopes and antigenic propensity score of chimer protein. Also, the predominant 3M2e epitopes were not hidden in the chimer protein. The initial in vivo experiment showed that 3M2e-HSP chimer protein stimulates specific immune responses. In conclusion, the results of the current study suggest that 3M2e-HSP chimer protein would be an effective universal subunit vaccine candidate against influenza infection. |
| Databáze: | OpenAIRE |
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