title: Synergism of tumor necrosis factor and interferon-gamma in induction of differentiation of human myeloblastic leukemic ML-1 cells.
abstract: Natural or recombinant human tumor necrosis factor (TNF) induced NBT-reducing activity of ML-1 cells in a dose-dependent manner. Interferon-gamma (IFN-gamma) induced NBT-reducing activity only marginally. However, when IFN-gamma was combined with TNF, induction of NBT-reducing activity was remarkably increased. IFN-alpha or -beta had almost no effect on the induction of NBT-reducing activity of ML-1 cells, either alone or in combination with TNF. Treatment with both TNF and IFN-gamma synergistically enhanced morphological changes, growth inhibition and activity of Fc receptors, and NBT reduction in ML-1 cells, but not phagocytic activity. The TNF treated cells were classified as macrophage-like by morphology, and by lineage-specific alpha-naphthyl acetate esterase stain. The results indicate that combinations of TNF and IFN-gamma act synergistically in the induction of differentiation of human myeloblastic ML-1 cells.
mesh_terms: D002454:Cell Differentiation; D002460:Cell Line; D003603:Cytotoxins / Q000494:pharmacology*; D004357:Drug Synergism; D006023:Glycoproteins / Q000502:physiology*; D006801:Humans; D007371:Interferon-gamma / Q000502:physiology*; D007700:Kinetics; D015470:Leukemia, Myeloid, Acute; D011994:Recombinant Proteins / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha
chemical_list: D003603:Cytotoxins; D006023:Glycoproteins; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma