L, M RAW 264.7 cells transfected with control siRNA (si-control) or MARCH2-specific siRNA (si-MARCH2) were infected with PR8-GFP (MOI = 1), VSV-GFP (MOI = 0.5), poly (I:C) (20 µg/ml) or HSV-GFP (MOI = 1) poly (dA:dT) (1 µg/ml) and IFN-β (L), and IL-6 (M) levels in the supernatant were measured in an ELISA. 