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The evolution of virus-induced apoptosis
1Department of Zoology, University of Oxford, UK. david@lamarck.zoo.ox.ac.uk
Proceedings. Biological Sciences
|February 3, 1998
Summary
Viruses manipulate host cell death (apoptosis) to enhance their replication. This study introduces a mathematical model explaining why viruses sometimes promote apoptosis and other times inhibit it, depending on viral replication and cell type.
Area of Science:
- Virology
- Cell Biology
- Evolutionary Biology
Background:
- Viruses utilize host cell death pathways to optimize viral fitness.
- Viral strategies regarding apoptosis are diverse, with some viruses inhibiting it and others inducing it.
- Opposing host and viral interests in apoptosis regulation impact infection outcomes.
Purpose of the Study:
- To develop a mathematical framework for understanding virus-induced apoptosis.
- To reconcile contradictory observations of viral strategies in apoptosis regulation.
- To analyze how viral replication and target cell lifecycle influence apoptosis outcomes.
Main Methods:
- Mathematical modeling of virus-host interactions concerning apoptosis.
- Analysis of evolutionary strategies in viral exploitation of cell death programs.
- Case study comparisons including Epstein-Barr virus, African swine fever virus, and alphavirus encephalitis.
Main Results:
- A framework is presented that explains dual roles of apoptosis in viral infections.
- Model accounts for virus-induced apoptosis being beneficial or detrimental to the host.
- Viral replication mode and target cell characteristics are key determinants of apoptosis strategy.
Conclusions:
- Virus-induced apoptosis outcomes are context-dependent, influenced by viral and host factors.
- The mathematical framework provides insights into the evolution of viral manipulation of cell death.
- Understanding these dynamics is crucial for predicting and managing viral infections.