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mGem: Deciphering how polyomaviruses coexist with their hosts for a lifetime.
James M Pipas1, Christopher S Sullivan2
1Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Mbio
|January 5, 2026
Summary
Polyomaviruses establish lifelong infections by manipulating host cells and using viral elements for persistence. Understanding these strategies is key to managing infections in immunocompromised individuals.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Polyomaviruses are small DNA tumor viruses known for causing persistent, lifelong infections.
- These viruses persist despite host immune responses and limited genomic capacity.
Purpose of the Study:
- To review the mechanisms polyomaviruses use for persistence and shedding.
- To highlight viral strategies for establishing and maintaining chronic infections.
Main Methods:
- Literature review synthesizing historical and recent research.
- Analysis of viral non-coding control region modulation.
- Examination of viral microRNA-mediated repression and host cell cycle regulation.
Main Results:
- Polyomaviruses utilize dynamic host cell cycle regulation for persistence.
- Viral non-coding control regions and microRNAs play crucial roles in infection.
- Shedding modes include concurrent latent/lytic and smoldering infections, with evidence of reversible latency.
Conclusions:
- Polyomavirus persistence strategies demonstrate remarkable evolutionary success.
- Understanding these mechanisms is vital for managing viral reactivation and disease in immunocompromised patients.
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