Potentiation of interferon's antiviral activity by the mutually synergistic interaction of MuIFN-alpha/beta and MuIFN-gamma.
The interaction of the interferons (IFNs) that cooperate to potentiate the antiviral action of IFN was studied. Serial dilutions of MuIFN-gamma and MuIFN-alpha/beta were employed separately and in combination to block virus replication in one-step, virus yield reduction experiments. To calculate the potentiation of IFN activity, protection levels obtained for each combination of MuIFN-gamma and MuIFN-alpha/beta were compared with those obtained for the separate IFNs. Potentiation levels increased with increasing concentrations of each of the IFNs in a dose-dependent manner, suggesting that potentiation of IFN's antiviral activity was the result of the mutually synergistic interaction of the IFNs. Three challenge viruses were employed: Mengo virus (positive-strand RNA virus), vesicular stomatitis virus (negative-strand RNA virus), and vaccinia virus (DNA virus). Identical results were observed with the three different viruses, suggesting that mutual synergism was a basic feature of the potentiation of IFN's antiviral activity by combined preparations of MuIFN-gamma and MuIFN-alpha/beta.
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D007370:Interferon Type I / Q000008:administration & dosage*; D007371:Interferon-gamma / Q000008:administration & dosage*; D008574:Mengovirus / Q000254:growth & development; D051379:Mice; D014616:Vaccinia virus / Q000254:growth & development; D014721:Vesicular stomatitis Indiana virus / Q000254:growth & development; D014762:Viral Interference; D014779:Virus Replication / Q000187:drug effects
D007370:Interferon Type I; D007371:Interferon-gamma