Potentiation of interferon action.

Potentiation of interferon action was described as a non-additive, synergistic enhancement of interferon activity by combined preparations of immune and virus-type interferons. The potentiated antiviral activity was demonstrated for a variety of virus types as well as for the human and mouse in vitro systems. Potentiation by combined immune and fibroblast interferons was also demonstrated for the antitumor and direct anticellular effects of interferon. Use of partially purified immune and fibroblast interferons demonstrated that potentiation appeared to be a property of the interferon molecules themselves.