title: Study on induction of differentiation of a human megakaryoblastic leukemia cell line (HIMeg) by 1,25-dihydroxyvitamin D3.
abstract: It is reported that 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), a physiological factor, has an inductive effect on the differentiation of a novel human megakaryoblastic leukemia cell line (HIMeg) in vitro. At the concentrations ranging from 10(-9) to 10(-6) mol/L, 1,25(OH)2D3 showed inhibition of proliferation on HIMeg cells which was demonstrated by count of survival cells and cloning efficiency. Meanwhile, using light/electron microscopy, stain of cytochemistry (including immunoenzymatic technique) and flow cytometry, we found that HIMeg cells could be further induced into more mature cells in megakaryocytic lineage confirmed by a series of evidence, including the changes of cell morphology/structure and cytochemistry, increased expression of differentiation antigens on the cell surface, and polyploidization. So, it is possible for 1,25(OH)2D3 to promote the differentiation of the cells in megakaryocytic lineage in vivo and to be used to treat acute megakaryoblastic leukemia and other diseases with malignant megakaryocytosis.
authors.affiliation: Department of Hematology, Changhai Hospital, Second Military Medical University, Shanghai, PRC.
authors.forename: T
authors.initials: T
authors.lastname: Cheng
authors.forename: F
authors.initials: F
authors.lastname: Yan
authors.forename: J H
authors.initials: JH
authors.lastname: Wan
authors.forename: J L
authors.initials: JL
authors.lastname: Yin
authors.forename: S J
authors.initials: SJ
authors.lastname: Zhang
authors.forename: S L
authors.initials: SL
authors.lastname: Qi
authors.forename: Y H
authors.initials: YH
authors.lastname: Song
mesh_terms: D002117:Calcitriol / Q000494:pharmacology*; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D006801:Humans; D007947:Leukemia, Megakaryoblastic, Acute / Q000473:pathology*; D011123:Polyploidy; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000473:pathology
chemical_list: D002117:Calcitriol