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Abstract
In this report, the contribution of PKR to the IFN-gamma mediated inhibition of VSV replication in neurons was examined. IFN-gamma treatment of NB41A3 murine neuroblastoma cells resulted in the reduced expression of VSV protein during infection. PKR was found to be modestly upregulated in NB41A3 cells following IFN-gamma treatment. The phosphorylation state of PKR and its downstream target, eIF2alpha, were unaffected by either IFN-gamma or VSV infection. Inhibition of PKR through the use of 2-aminopurine or the expression of the Influenza A NS1 gene had no effect on the ability of IFN-gamma to inhibit the replication of VSV in vitro. These data indicate that endogenously expressed PKR is not required for the IFN-gamma mediated inhibition of VSV replication in NB41A3 neuroblastoma cells.
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