PMID: 2124247Dec 1, 1990Paper

Antitumor activities of interferon alpha, beta, and gamma and their combinations on human melanoma cells in vitro: changes of proliferation, melanin synthesis, and immunophenotype

The Journal of Investigative Dermatology
C GarbeC E Orfanos

Abstract

The antitumor activities of human interferon (IFN) alpha, beta, and gamma alone or in combination were studied on four human melanoma cell lines (StML-11, StML-12, StML-14, and SKMel-28) in various concentrations (1-50,000 IU/ml IFN alpha, 0.1-1000 IU/ml IFN beta, 1-10,000 IU/ml IFN gamma) in vitro. In all experiments IFN beta exhibited the most potent antiproliferative effect of all IFN tested. After 3 d of incubation a 50% growth inhibition was achieved with 20-40 IU/ml for natural IFN beta and with 600-1200 U/ml for recombinant IFN gamma. Substantially higher doses (7,000 to more than 50,000 IU/ml) of recombinant IFN alpha 2a were required to achieve a 50% growth inhibition. A strong synergistic antiproliferative activity resulted from the combination of IFN alpha with IFN gamma and IFN beta with IFN gamma. None of the IFN tested induced terminal differentiation of melanoma cells in vitro. The formation of dendrites was inhibited, and the portion of differentiated cells in vitro was reduced after treatment with IFN in comparison to the untreated controls (untreated controls: 100%; portion of differentiated cells after treatment with IFN alpha: 58%-74%, IFN beta: 48%-96%, IFN gamma: 10%-33%). The melanin synthesis was slightl...Continue Reading

Citations

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