title: Effect of interferon-gamma and 1 alpha,25-dihydroxyvitamin D3 on superoxide anion, prostaglandins E2, and mononuclear cell factor production by U937 cells.
abstract: Both interferon-gamma (IFN-gamma) and 1 alpha,25-dihydroxyvitamin D3 (1 alpha,25(OH)2D3) induce changes in the human monocytic cell line U937 that may reflect cellular differentiation. The effects of recombinant IFN-gamma and 1 alpha,25(OH)2D3 on U937 cells with regard to the release of superoxide anion (O2-), prostaglandin E2 (PGE2), and mononuclear cell factor (MCF) after stimulation with phorbol myristate acetate (PMA) were examined. PMA did not induce O2- production in untreated cells. A 3-day preincubation with IFN-gamma or 1 alpha,25(OH)2D3 resulted in a 5- to 10-fold increase in PMA-stimulated production of O2- as compared to cells preincubated in medium alone. The response was related to IFN-gamma and 1 alpha,25(OH)2D3 concentrations. In contrast, the PMA-induced production of PGE2 and MCF does not require preincubation with either IFN-gamma or 1 alpha,25(OH)2D3. These results suggest that O2- production and cytokine production (i.e., PGE2 and MCF) are modulated by different signals related to maturation processes.
mesh_terms: D002117:Calcitriol / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D015232:Dinoprostone; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D003012:Microbial Collagenase / Q000378:metabolism*; D009000:Monocytes / Q000502:physiology*; D015846:Monokines; D011458:Prostaglandins E / Q000096:biosynthesis*; D014176:Protein Biosynthesis; D013481:Superoxides / Q000096:biosynthesis*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D015846:Monokines; D011458:Prostaglandins E; D013481:Superoxides; D007371:Interferon-gamma; D003012:Microbial Collagenase; D002117:Calcitriol; D015232:Dinoprostone; D013755:Tetradecanoylphorbol Acetate