Anti-proliferative activity of natural interferon-alpha, isotretinoin and their combination varies in different human melanoma cell lines.
Natural interferon alpha (nIFN-alpha) isotretinoin and their combination were tested for their capacity to modulate the proliferation of different human melanoma cell lines. Modulation of cell growth was measured using the MTT-assay. Isotretinoin and nIFN-alpha as single agents inhibited the proliferation in a dose dependent manner in the three cell lines: SK-Mel-30, SK-Mel-28 and MaRi. The combination of isotretinoin and nIFN-alpha led to a marked enhancement of the antiproliferative effect compared with either nIFN-alpha or isotretinoin alone in SK-Mel-30 cells. In contrast, there were no additive effects on growth inhibition of melanoma cell lines SK-Mel-28 and MaRi when nIFN-alpha and isotretinoin was combined. In one melanoma cell line (MaRi) proliferation was actually enhanced by isotretinoin in combination with nIFN-alpha. These results demonstrate the heterogeneous response of human melanoma cell lines to noncytotoxic concentrations of isotretinoin and nIFN-alpha alone and in combination.
Schaber
B
B
Department of Dermatology, University of Tübingen, Germany.
Mayer
P
P
Schreiner
T
T
Rassner
G
G
Fierlbeck
G
G
D002455:Cell Division / Q000187:drug effects; D004357:Drug Synergism; D006131:Growth Inhibitors / Q000494:pharmacology*; D006801:Humans; D016898:Interferon-alpha / Q000494:pharmacology*; D015474:Isotretinoin / Q000494:pharmacology*; D008545:Melanoma / Q000473:pathology*; D014407:Tumor Cells, Cultured / Q000187:drug effects
D006131:Growth Inhibitors; D016898:Interferon-alpha; D015474:Isotretinoin