Fig. 2. PKR mediates IFN-α/β production by MEFs in response to EMCV.
Immortalized MEFs (5×105/well) were stimulated with IFN A/D (1000 U/ml) for two hours prior to infection with EMCV or SeV. IFN-α/β accumulation in the culture supernatants was measured by ELISA after overnight culture. Data are the mean ± SD of triplicate wells. (A) IFN-β protein (left panel) and IFN-α protein (right panel) from PKR−/− and wild-type MEFs infected with EMCV (MOI=10) or SeV (MOI=1). (B) IFN-β protein (left panel) and IFN-α protein (right panel) from siRNA-treated MEFs after infection with EMCV or SeV (MOI=1). Data are representative of four independent experiments.