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The effect of pyrophosphate analogues on influenza virus RNA polymerase and influenza virus multiplication
Archives of Virology
|January 1, 1979
Abstract:
Analogues of pyrophosphate have been tested as inhibitors of influenza virus-RNA polymerase activity in cell-free assays. The most active compound, phosphonoformic acid (PFA), reduced the polymerase activity to 50 per cent at a concentration of 20 muM. The inhibition was dependent on the type of divalent cation present in the assay. PFA at a concentration of 400 muM also inhibited the influenza virus plaque formation by 90 per cent.
Insights
Pyrophosphate analogues, including phosphonoformic acid (PFA), inhibit influenza virus-RNA polymerase. PFA effectively reduced viral polymerase activity and plaque formation in cell-free assays.
Area of Science:
- Virology
- Biochemistry
- Antiviral Research
Background:
- Influenza virus replication relies on its RNA-dependent RNA polymerase.
- Pyrophosphate analogues are explored for their potential antiviral properties.
Purpose of the Study:
- To evaluate pyrophosphate analogues as inhibitors of influenza virus RNA polymerase.
- To identify the most potent inhibitor and assess its efficacy.
Main Methods:
- Cell-free assays were used to measure RNA polymerase activity.
- The effect of phosphonoformic acid (PFA) on polymerase activity was determined.
- Influenza virus plaque formation assays were conducted to assess antiviral effects.
Main Results:
- Phosphonoformic acid (PFA) demonstrated significant inhibition of influenza virus-RNA polymerase activity.
- A 50% reduction in polymerase activity was observed at 20 muM PFA.
- PFA inhibited influenza virus plaque formation by 90% at 400 muM.
- Inhibition was dependent on the presence and type of divalent cations.
Conclusions:
- Phosphonoformic acid (PFA) is a potent inhibitor of influenza virus RNA polymerase.
- PFA exhibits antiviral activity against influenza virus replication.
- Divalent cations play a crucial role in PFA's inhibitory mechanism.