title: Potentiation of the antiviral and anticellular activities of interferons by mixtures of HuIFN-gamma and HuIFN-alpha or HuIFN-beta.
abstract: Treatment of transformed human amnion WISH cells or human diploid fibroblasts (FS-4) or human fibroblasts trisomic for chromosome 21 (GM2767) with mixtures of human interferon gamma (HuIFN-gamma) and either natural leukocyte HuIFN-alpha or recombinant HuIFN alpha 2 or natural fibroblast HuIFN-beta resulted in potentiation of the antiviral activity of these IFNs. Pretreatment for 22 h of WISH cells with HuIFN-gamma followed by the addition of either HuIFN-alpha or HuIFN-beta resulted in significant potentiation of the antiviral action of these IFNs. The range of potentiation was 3 to 15-fold. Similar potentiation was observed when these IFNs were added simultaneously to the cells. Pretreatment for 22 h of WISH cells with either HuIFN-alpha or HuIFN-beta followed by the addition of HuIFN-gamma also resulted in significant increase of the antiviral protection against virus yield (3 to 39-fold). The level of the potentiation was higher in comparison with the antiviral activity observed when all these IFNs were added at the same time. Treatment of human FS-4 and GM2767 fibroblasts with HuIFN-gamma and either HuIFN-alpha or HuIFN-beta revealed potentiation of anticellular properties of these IFNs. The level of potentiation of anticellular activity was in the range of 2.7- to 9.4-fold. In the majority of the experiments, maximum potentiation of either antiviral or anti-cellular activity was observed when mixtures of equivalent concentrations of IFNs were used. The antiviral and anticellular functions of natural or recombinant IFN-alpha and fibroblast IFN-beta were potentiated usually to a similar degree by the presence of IFN-gamma. In contrast, combinations of HuIFN-alpha (natural or recombinant) and HuIFN-beta, in the absence of HuIFN-gamma, did not potentiate the anticellular or antiviral activity.
authors.forename: E
authors.initials: E
authors.lastname: Oleszak
authors.forename: W E
authors.initials: WE
authors.lastname: Stewart
mesh_terms: D002455:Cell Division / Q000187:drug effects*; D004357:Drug Synergism; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D007370:Interferon Type I / Q000494:pharmacology*; D007371:Interferon-gamma / Q000494:pharmacology*; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014721:Vesicular stomatitis Indiana virus / Q000187:drug effects; D014780:Viruses / Q000187:drug effects*
chemical_list: D007370:Interferon Type I; D014316:Tritium; D007371:Interferon-gamma; D013936:Thymidine