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  • Title: Megakaryocytic differentiation of a leukemic cell line, MC3, by phorbol ester: induction of glycoprotein IIb/IIIa and effects on expression of IL-6, IL-6 receptor, mpl and GATA genes.
    Author: Okabe M, Kunieda Y, Shoji M, Nakane S, Kurosawa M, Tanaka J, Hansen SR, Asaka M.
    Journal: Leuk Res; 1995 Dec; 19(12):933-43. PubMed ID: 8632663.
    Abstract:
    We investigated megakaryocytic differentiation in a newly-established Ph1-positive leukemic cell line, MC3, which showed tri-lineage immunophenotypes (myeloid antigens2+, CD19(1+) and CD41a1+) and was positive for CD34 and CD38. TPA induced MC3 cells to differentiate to an early stage of megakaryocyte lineage exhibiting an increase in the expression of platelet glycoproteins (GP) IIb/IIIa (CD41a), and an increase in cell size and nuclear ploidy. TPA treatment also enhanced the expression of GPIIb mRNA, and induced the expression of interleukin-6 (IL-6) and its receptor mRNAs, while it did not induce transcripts of the genes IL-11 and mpl ligand, and further decreased the transcript of the mpl gene. Consistent with these findings, MC3 cells treated with TPA showed an increased expression of GATA-1, but not GATA-3 transcripts, whereas those without TPA treatment expressed only the GATA-2 transcript. These results provide an insight into the study for the regulatory mechanism of megakaryocytopoiesis and leukemic cell differentiation.
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