title: Differentiation of mouse myeloid leukemia cells induced by 1 alpha,25-dihydroxyvitamin D3.
abstract: Mouse myeloid leukemia cells can be induced to differentiate into macrophages in vitro by 1 alpha,25-dihydroxyvitamin D3, the active form of vitamin D3. The minimal concentration of 1 alpha,25-dihydroxyvitamin D3 to induce the cell differentiation was 0.12 nM. The degree of cell differentiation in various markers induced by 12 nM 1 alpha,25-dihydroxyvitamin D3 was nearly equivalent to that induced by 1 microM dexamethasone, the most potent known stimulator. Among several markers of the differentiation by 1 alpha,25-dihydroxyvitamin D3, phagocytic activity was induced within 24 hr, and this was followed by induction of lysozyme and locomotive activities. Similar changes were also induced by 0.01-1 microM 1 alpha-hydroxyvitamin D3. 25-Hydroxyvitamin D3 and 24R,25-dihydroxyvitamin D3 showed only weak inducing activity. These results suggest the possibility that, in addition to its wellknown biological activities in enhancing intestinal calcium transport and bone mineral mobilization, 1 alpha, 25-dihydroxyvitamin D3 is involved in the differentiation of bone marrow cells.
mesh_terms: D000818:Animals; D002117:Calcitriol / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D003176:Complement C3 / Q000378:metabolism; D003907:Dexamethasone / Q000494:pharmacology; D004790:Enzyme Induction / Q000187:drug effects; D007942:Leukemia, Experimental / Q000473:pathology*; D008264:Macrophages / Q000166:cytology*; D051379:Mice; D009113:Muramidase / Q000096:biosynthesis; D010587:Phagocytosis / Q000187:drug effects; D011951:Receptors, Complement / Q000378:metabolism; D011961:Receptors, Fc / Q000378:metabolism
chemical_list: D003176:Complement C3; D011951:Receptors, Complement; D011961:Receptors, Fc; D003907:Dexamethasone; D009113:Muramidase; D002117:Calcitriol