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Updated: May 20, 2026

Reverse Genetics Mediated Recovery of Infectious Murine Norovirus
Published on: June 24, 2012
Favipiravir (T-705) inhibits in vitro norovirus replication
J Rocha-Pereira1, D Jochmans, K Dallmeier
1Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal.
Abstract:
Human noroviruses are the primary cause of foodborne gastroenteritis. Potent and safe inhibitors are needed for the treatment/prophylaxis of norovirus infections. We demonstrate that Favipiravir [T-705, a drug in advanced clinical development for the treatment of infections with the influenza virus] inhibits in vitro murine norovirus replication. Time-of-drug addition studies reveal that T-705 exerts its activity at a time-point that coincides with onset of viral RNA synthesis, which is in line with the viral polymerase as the presumed target.
Insights
Favipiravir (T-705) effectively inhibits murine norovirus replication in laboratory settings. This antiviral shows promise for treating norovirus infections by targeting viral RNA synthesis.
Area of Science:
- Virology
- Antiviral drug development
- Gastroenterology
Background:
- Human noroviruses are a leading cause of foodborne gastroenteritis worldwide.
- There is a critical need for effective treatments and preventative measures against norovirus infections.
Purpose of the Study:
- To investigate the antiviral activity of Favipiravir (T-705) against murine norovirus.
- To identify the stage of viral replication targeted by Favipiravir.
Main Methods:
- In vitro studies were conducted to assess Favipiravir's effect on murine norovirus replication.
- Time-of-drug addition experiments were performed to determine the mechanism of action.
Main Results:
- Favipiravir demonstrated significant inhibition of murine norovirus replication in vitro.
- The drug's activity was observed during the viral RNA synthesis phase, suggesting polymerase inhibition.
Conclusions:
- Favipiravir (T-705) is a potent inhibitor of murine norovirus replication.
- The findings support the hypothesis that Favipiravir targets the viral polymerase, offering a potential therapeutic strategy for norovirus infections.
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