Characterization of Chikungunya Virus-Like Particles
| Autor: | Surapee Anantapreecha, Pathompong Sittisaman, Prukswan Chetanachan, Naokazu Takeda, Nitchakarn Noranate, Atchareeya A-nuegoonpipat |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Antigenicity
Viral Diseases viruses lcsh:Medicine Enzyme-Linked Immunosorbent Assay Biology medicine.disease_cause Antibodies Viral Virus Antigen Microscopy Electron Transmission medicine Medicine and Health Sciences Humans Chikungunya Vector (molecular biology) lcsh:Science Microscopy Immunoelectron Antigens Viral DNA Primers Multidisciplinary Base Sequence Immunogenicity lcsh:R Virion virus diseases Chikungunya Infection Virology Infectious Diseases HEK293 Cells Codon usage bias biology.protein lcsh:Q Antibody Chikungunya virus Research Article |
| Zdroj: | PLoS ONE PLoS ONE, Vol 9, Iss 9, p e108169 (2014) |
| ISSN: | 1932-6203 |
| Popis: | Chikungunya virus (CHIKV) is becoming a global concern due to the increasing number of outbreaks throughout the world and the absence of any CHIKV-specific vaccine or treatment. Virus-like particles (VLPs) are multistructured proteins that mimic the organization and conformation of native viruses but lack the viral genome. They are noninfectious and potentially safer vaccine candidates. Recent studies demonstrated that the yield of CHIKV VLPs varies depending on the strains, despite the 95% amino acid similarity of the strains. This might be due to the codon usage, since protein expression is differently controlled by different organisms. We optimized the region encoding CHIKV structural proteins, C-E3-E2-6k-E1, inserted it into a mammalian expression vector, and used the resulting construct to transfect 293 cells. We detected 50-kDa proteins corresponding to E1 and/or E2 in the cell lysate and the supernatant. Transmission electron microscopy revealed spherical particles with a 50- to 60-nm diameter in the supernatant that resembled the native CHIKV virions. The buoyant density of the VLPs was 1.23 g/mL, and the yield was 20 µg purified VLPs per 108 cells. The VLPs aggregated when mixed with convalescent sera from chikungunya patients, indicating that their antigenicity is similar to that of native CHIKV. Antibodies elicited with the VLPs were capable of detecting native CHIKV, demonstrating that the VLPs retain immunogenicity similar to that of the native virion. These results indicated that CHIKV VLPs are morphologically, antigenically, and immunologically similar to the native CHIKV, suggesting that they have potential for use in chikungunya vaccines. |
| Databáze: | OpenAIRE |
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