Figure 5. Basal expression of ISGs in MPNST cell lines and effect of increased ISG expression on viral productivity.
Basal expression of ISGs in all human MPSNT cell lines was assessed by western blot (A). S462-luc cells were treated with IFN-β for 24 hr and subsequently probed by immunoblot for ISGs (B) or infected with C101 at MOI=0.2. Infected cells were then assessed by FACS for the percentage of cells positive for viral eGFP at 48 hpi (B). S462-luc was stably transduced with a control lentivirus (DsRed2) or lentiviruses encoding the transcription factors STAT1-FLAG, STAT2 and IRF9 which compose the ISGF3 complex were assessed for ISG expression by western blot (C). Multi-step (MOI=0.1, 48 hpi) and single-step (MOI=1, 24 hpi) (D) viral recovery assays with R3616 were conducted in control and ISGF3 transduced cell lines. In each described assay, data were collected in triplicate and the standard deviation reported. The log-fold change is reported under the significance indicator.