Figure 5.
APOBEC3G siRNA blocks IFN-α anti-HIV activity. Monocytes were transfected with APOBEC3G siRNA, cultured for 6 d, infected with HIV, and treated or not with 1 ng/ml IFN-α. P24 levels were monitored in the supernatants of untreated and treated macrophage cultures at the indicated time points after infection with HIV. Inset: Nested PCR to evaluate initial rounds of HIV replication (day 2 after infection) in cells transfected with APOBEC3G-specific siRNA or negative control siRNA, electroporation only control (EPC), or left untreated (C), and then infected with HIV. Increased proviral DNA was evident in cells depleted of APOBEC3G. Representative experiment, n = 3.