title: 1,25-Dihydroxyvitamin D3 induces monocytic differentiation of the PLB-985 leukemic line and promotes c-fgr mRNA expression.
abstract: 1,25-dihydroxyvitamin D3 [1,25(OH)2D] is known to stimulate maturation of the human promyelocytic line HL-60 and murine bone marrow precursor cells along a monocyte/macrophage pathway. In this study, the steroid's effects on the PLB-985 leukemic line were examined. We found that 1,25(OH)2D induces monocytic differentiation of PLB-985 as manifested by morphological appearance, histochemical staining, and changes in cell surface antigen expression. Additionally, there was acquisition of functional monocyte characteristics including phagocytic activity and superoxide anion production via the respiratory burst pathway. Steady state levels of mRNA derived from the leukocyte-specific proto-oncogene c-fgr were also increased by the steroid. Thus, 1,25(OH2)D effectively differentiates PLB-985 cells along a monocytic pathway, providing a useful model of macrophage differentiation.
authors.affiliation: Department of Pathology and Laboratory Medicine, Jewish Hospital, Washington University Medical Center, St. Louis, Missouri 63110.
authors.forename: S L
authors.initials: SL
authors.lastname: Perkins
authors.forename: D C
authors.initials: DC
authors.lastname: Link
authors.forename: S
authors.initials: S
authors.lastname: Kling
authors.forename: T J
authors.initials: TJ
authors.lastname: Ley
authors.forename: S L
authors.initials: SL
authors.lastname: Teitelbaum
mesh_terms: D002117:Calcitriol / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects; D015973:Gene Expression Regulation, Leukemic / Q000187:drug effects*; D006412:Hematopoietic Stem Cells / Q000187:drug effects; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics* / Q000378:metabolism / Q000473:pathology*; D009000:Monocytes / Q000378:metabolism / Q000473:pathology*; D010587:Phagocytosis / Q000187:drug effects; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics* / Q000378:metabolism; D013481:Superoxides / Q000378:metabolism; D014407:Tumor Cells, Cultured; D019061:src-Family Kinases
chemical_list: C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D013481:Superoxides; C053102:proto-oncogene proteins c-fgr; D019061:src-Family Kinases; D002117:Calcitriol