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- W2056531031 abstract "Stromal derived factor-1α (SDF-1α), the high-affinity ligand of CXC-chemokine receptor 4 (CXCR4), was added to human CD34+ hematopoietic progenitor cells that can be induced to differentiate along the monocytic or megakaryocytic lineages. In control liquid cell cultures supplemented with two different cytokine cocktails: stem cell factor (SCF), interleukin-3 (IL-3), macrophage-colony stimulating factor (M-CSF), and 10% fetal calf serum (FCS), or, SCF and thrombopoietin (TPO), the expression of surface CXCR4 progressively increased in both the CD14+ monocytic and CD41+ megakaryocytic lineages. While SDF-1α caused only modest effects on cells of the monocytic lineage, it induced profound down-regulation of CXCR4 in megakaryocytic cells at all stages of differentiation. Moreover, while SDF-1α initially up-regulated the early megakaryocytic antigen CD41, at later time points (days 12–16) it induced down-regulation of the late megakaryocytic antigen CD42b. Consistently, at day 16, the number of mature megakaryocytes was significantly decreased in cultures supplemented with SDF-1α. These findings indicate that, besides its primary role in regulating the retention of precursor cells in hematopoietic tissues, the SDF-1α/CXCR4 system participates in the regulation of megakaryocytic development by stimulating the formation of immature megakaryoblasts and inhibiting the formation of mature megakaryocytes. Anat Rec 260:141–147, 2000. © 2000 Wiley-Liss, Inc." @default.
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- W2056531031 date "2000-01-01" @default.
- W2056531031 modified "2023-09-24" @default.
- W2056531031 title "Differential effects of stromal derived factor-1? (SDF-1?) on early and late stages of human megakaryocytic development" @default.
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- W2056531031 doi "https://doi.org/10.1002/1097-0185(20001001)260:2<141::aid-ar40>3.0.co;2-i" @default.
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