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[Modeling of persistent HeLa cell infections caused by different Japanese encephalitis virus clones]
Abstract:
The authors developed two models of persistent infections of a HeLa cell clone with mildly pathogenic clones of the Nakayama and Peking I strains of Japanese encephalitis virus. The distinguishing features of these models included the noncytocidal nature of the infectious process, predominance of the small-plaque phenotype, further decrease of the infectious properties of the persisting viruses. Altogether during the observation period 84 subpassages of each of the two systems were made without any visible signs of cell degeneration.
Insights
Researchers created persistent Japanese encephalitis virus infection models in HeLa cells. These models show non-lethal infections with reduced viral infectivity, crucial for studying chronic viral diseases.
Area of Science:
- Virology
- Cell Biology
- Infectious Diseases
Background:
- Japanese encephalitis virus (JEV) can cause persistent infections.
- Understanding JEV persistence is vital for disease management.
Purpose of the Study:
- To develop and characterize models of persistent Japanese encephalitis virus infection in a HeLa cell clone.
- To investigate the viral and cellular changes during chronic JEV infection.
Main Methods:
- Infection of HeLa cells with mild strains of Japanese encephalitis virus (Nakayama and Peking I).
- Serial subpassaging of infected cells over 84 passages.
- Monitoring for cytopathic effects and viral properties.
Main Results:
- Established non-cytocidal persistent JEV infection models.
- Observed a predominance of the small-plaque phenotype in persisting viruses.
- Documented a decrease in the infectious properties of the viruses over time.
Conclusions:
- The developed models allow for the study of non-cytocidal viral persistence.
- Persisting JEV exhibits altered characteristics, including reduced infectivity and altered plaque morphology.
- These models are valuable for investigating chronic viral pathogenesis and host-cell interactions.