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Can live attenuated virus work as post-exposure treatment?
1Dept of Zoology, University of Oxford, UK.
Immunology Today
|March 1, 1995
Summary
Mathematical models reveal that virus variants inducing lower viral loads can be competitively superior. This finding suggests potential for using less pathogenic mutants in post-exposure treatment for persistent viral infections.
Area of Science:
- Virology
- Mathematical Biology
- Immunology
Background:
- Competition between virus variants is influenced by immune responses.
- Cross-reactive immunity can affect viral dynamics.
- Viral pathogenesis is typically associated with high viral loads.
Purpose of the Study:
- To investigate the evolutionary dynamics of virus variants under cross-reactive immunity.
- To explore whether less pathogenic virus variants can be favored by selection.
- To assess the potential of less pathogenic mutants for therapeutic applications.
Main Methods:
- Development of simple mathematical models.
- Analysis of competition between virus variants.
- Simulation of immune response interactions.
Main Results:
- Selection can favor virus variants that induce lower viral loads, contrary to traditional assumptions.
- These 'less pathogenic' variants can be 'competitively superior'.
Conclusions:
- Virus evolution can lead to decreased pathogenicity.
- Less pathogenic virus mutants may offer a novel strategy for post-exposure treatment of persistent viral infections.