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Cooperative nature of viral replication
Iván Andreu-Moreno1, Juan-Vicente Bou1, Rafael Sanjuán2
1Institute for Integrative Systems Biology (I2SysBio), Consejo Superior de Investigaciones Científicas-Universitat de València, C/ Catedrático Agustín Escardino 9, 46980 Paterna, València, Spain.
Science Advances
|December 5, 2020
Summary
Viral replication is a cooperative process where multiple genome copies entering a cell boost progeny production. This finding explains faster viral spread and enhanced infectivity, impacting viral fitness.
Area of Science:
- Virology
- Molecular Biology
- Infectious Disease Dynamics
Background:
- Viral infection relies on efficient host dissemination.
- Recent studies suggest viral aggregates enhance infectivity and spread, challenging the independent particle model.
- The mechanisms behind enhanced viral infectivity and spread remain unclear.
Purpose of the Study:
- To investigate the cooperative nature of viral replication.
- To understand how multiple viral genome copies within a cell influence progeny production.
- To explore the implications of cooperative replication for viral fitness and spread.
Main Methods:
- Developed a simplified mathematical model for cooperative viral replication.
- Incorporated cooperativity into complex models for specific human viruses.
- Experimentally validated predictions using various mammalian viruses.
Main Results:
- Demonstrated that viral replication is a cooperative process.
- Showed that multiple viral genome copies entering a cell disproportionately increase short-term progeny production.
- Identified positive feedback between replication templates and viral products as the source of cooperativity.
Conclusions:
- Cooperative replication is a general feature of viruses, arising from intrinsic molecular mechanisms.
- This cooperativity enhances viral fitness by increasing progeny production and facilitating faster spread.
- Findings challenge the traditional view of viruses as solely independent propagules and offer new insights into viral dynamics.
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