Abstract
Monensin is a ionophore compound with different biological activities. It raises the intralysosomal pH, it binds the plasma membranes particularly at the level of the cisternal system of the Golgi apparatus. It causes imbalance in the intramembrane ion traffic and inhibits export of secretory proteins at membrane level. Monensin blocks endocytosis and therefore impedes entry of toxic molecules. The drug also inhibits viral proliferation of RNA and DNA viruses such as vesicular stomatitis, influenza and human polyomaviruses. In this report we show that monensin effectively abolishes viral DNA replication of mouse polyomavirus. Results show that the half life of viral early mRNAs is significantly reduced in the presence of the drug. Therefore we suggest that the reduction of viral DNA synthesis is a consequence of the reduced intranuclear pool of viral early antigens.
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