Potentiated antitumor effects of interleukin 12 and interferon alpha against B16F10 melanoma in mice.

Systemic administration of cytokines has not found broad application in cancer immunotherapy due to its toxicity and lack of effectiveness in a broad spectrum of tumors. Among the most promising cytokines used often in pre-clinical and clinical trials are interferon alpha and interleukin 12. We have shown in our study that combining IL-12 with IFN-alpha in a dose which alone does not show antitumor activity results in potentiated antitumor effects without inducing toxicity.