title: Effect of prostaglandin E2 on gamma-interferon and 1,25(OH)2D3 vitamin D3-induced c-myc reduction during HL-60 cell differentiation.
abstract: The effect of prostaglandin E2 (PGE2) on the reduction of c-myc expression during the differentiation of the human leukemic cell line, HL-60, was examined. PGE2, a potent inducer of intracellular cyclic AMP (cAMP) in HL-60 cells, augmented monocyte-associated cell surface antigens induced by human gamma-interferon (IFN-gamma) or 1 alpha,25-dihydroxyvitamin D3 (1,25(OH)2D3) in these cells. The elevation of intracellular cAMP was induced dose-dependently by PGE2, but not by IFN-gamma or 1,25(OH)2D3. Changes were also seen in functional differentiation, such as, the increase of phagocytic capability and superoxide generation. PGE2 also enhanced the reduction of c-myc expression and the down-regulation of transferrin receptor by IFN-gamma or 1,25(OH)2D3, whereas PGE2 alone did not induce these phenotypic changes. These data suggest that IFN-gamma and 1,25(OH)2D3 reduce c-myc expression of HL-60 cells by a mechanism other than the augmentation of intracellular cAMP.
authors.affiliation: Department of Medicine, Kobe University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Matsui
authors.forename: Y
authors.initials: Y
authors.lastname: Nakao
authors.forename: T
authors.initials: T
authors.lastname: Koizumi
authors.forename: Y
authors.initials: Y
authors.lastname: Katakami
authors.forename: R
authors.initials: R
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Mihara
authors.forename: T
authors.initials: T
authors.lastname: Sugiyama
authors.forename: T
authors.initials: T
authors.lastname: Fujita
mesh_terms: D002117:Calcitriol; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D000242:Cyclic AMP / Q000096:biosynthesis; D015232:Dinoprostone / Q000494:pharmacology*; D005786:Gene Expression Regulation / Q000187:drug effects*; D006131:Growth Inhibitors / Q000494:pharmacology; D006801:Humans; D007371:Interferon-gamma; D015473:Leukemia, Promyelocytic, Acute / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D010641:Phenotype; D011518:Proto-Oncogene Proteins / Q000302:isolation & purification; D011519:Proto-Oncogenes / Q000187:drug effects*
chemical_list: D006131:Growth Inhibitors; D011518:Proto-Oncogene Proteins; D007371:Interferon-gamma; D000242:Cyclic AMP; D002117:Calcitriol; D015232:Dinoprostone