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Published on: July 13, 2019
The human polyomaviruses: from orphans and mutants to patchwork family
Abstract:
For almost 40 years, polyomavirus JC and BK were the only known human polyomaviruses but in the last 7 years, increased interest and innovative molecular screening techniques have led to the identification of 10 previously unknown polyomaviruses in humans. Two of these, Merkel cell polyomavirus and Trichodysplasia spinulosa polyomavirus, have also been found to cause disease in immunocompromised patients. Seroprevalence studies indicate that human polyomaviruses are transmitted independently of one another in humans and carry different risks of exposure and reexposure throughout life. The potential coexistence of 12 or more different polyomavirus species in the same host and possibly even in the same organ raises the question of potential interactions. Careful review of polyomavirus biology may facilitate new discoveries concerning these formerly underestimated viral agents and their influence on human health.
Insights
Recent advances have identified 10 new human polyomaviruses, expanding the known count to over 12. These viruses, including disease-causing Merkel cell polyomavirus, may interact within a single host, prompting further research.
Area of Science:
- Virology
- Human Pathogens
Background:
- For decades, only JC polyomavirus and BK polyomavirus were known human polyomaviruses.
- Recent molecular screening has identified 10 novel human polyomaviruses in the last seven years.
Discussion:
- Merkel cell polyomavirus and Trichodysplasia spinulosa polyomavirus are identified as pathogenic in immunocompromised individuals.
- Seroprevalence data suggests independent transmission and varied lifelong exposure risks for different human polyomaviruses.
- The possibility of multiple polyomavirus species coexisting in the same host or organ necessitates investigation into potential interactions.
Key Insights:
- The human polyomavirus family has significantly expanded beyond JC and BK polyomaviruses.
- Two newly identified polyomaviruses cause disease, highlighting their clinical relevance.
- Independent transmission patterns and co-infection potential are key considerations for understanding polyomavirus impact.
Outlook:
- Further research into polyomavirus biology is crucial for uncovering new insights.
- Understanding polyomavirus interactions may reveal their influence on human health.
- These formerly underestimated viral agents warrant continued scientific attention.
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