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Mycophenolic acid inhibits avian reovirus replication

Christopher M Robertson1, Laura L Hermann, Kevin M Coombs

  • 1Department of Medical Microbiology, University of Manitoba, Winnipeg, MB, Canada.

Antiviral Research
|September 29, 2004
PubMed

Insights

Mycophenolic acid (MPA) effectively inhibits avian reovirus (ARV) replication in cell cultures. Adding guanosine reversed this inhibition, suggesting a guanosine-dependent mechanism for ARV replication.

Area of Science:

  • Virology
  • Immunology
  • Biochemistry

Background:

  • Avian reoviruses (ARV) are significant poultry pathogens causing viral arthritis and tenosynovitis.
  • Mycophenolic acid (MPA), an inosine monophosphate dehydrogenase inhibitor, is used clinically for immunosuppression and inhibits various viral replications.

Purpose of the Study:

  • To investigate the potential of MPA as an antiviral agent against ARV.
  • To determine the efficacy and mechanism of MPA's inhibition of ARV replication in cell culture.

Main Methods:

  • ARV-infected QM5 quail fibrosarcoma cells were treated with MPA.
  • Viral progeny production was quantified.
  • ARV replication was assessed in HD-11 and Vero cell lines.
  • The effect of exogenous guanosine addition was evaluated.

Main Results:

  • MPA significantly inhibited ARV replication in QM5 cells, with a selectivity index of approximately 41.
  • Concentrations of 3 microg/ml MPA reduced infectious ARV progeny by over 100-fold.
  • MPA also inhibited ARV replication in HD-11 and Vero cells.
  • Exogenous guanosine addition restored ARV replication in MPA-treated cells.

Conclusions:

  • MPA demonstrates potent antiviral activity against ARV in cell culture.
  • The mechanism of MPA's inhibition appears to be guanosine-dependent.
  • MPA holds potential for controlling ARV infections in poultry.

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