Abstract
Platelet-derived growth factor (PDGF), a growth factor for connective tissue cells, stimulates erythropoiesis and megakaryocytopoiesis in vitro but the effect of PDGF on granulocyte proliferation remains unknown.The effect of the recombinant human PDGF-BB isoform on granulopoiesis was investigated in this study. The results show that PDGF significantly stimulated murine colony-forming unit-granulocyte-monocyte (CFU-GM) proliferation in a dose-dependent manner (1 to 100 ng/mL) using murine bone marrow cells (n = 4). Maximum stimulation was obtained with 50 ng/mL of PDGF (P < .01). The effect of PDGF on murine CFU-GM proliferation was compared with that of interleukin (IL)-3, IL-6, granulocyte-monocyte colony-stimulating factor (GM-CSF),and acidic fibroblast growth factor (aFGF) at their optimal doses.The stimulating activity of PDGF was higher than that of aFGF but lower than that of IL-3, IL-6, or GM-CSF. There is no synergistic effect between PDGF and IL-3 or IL-6, but a significant enhancing effect was observed in IL-3 plus IL-6. PDGF also stimulated the growth of CFU-GM with CFU-megakaryocyte in the presence of bone marrow stromal cells. We also found that PDGF had similar a effect on human CFU-GM proliferation using bone marrow mononuclear cells (MNC). However, the increase in PDGF-stimulated CFU-GM proliferation was inhibited by anti-GM-CSF, anti-IL-3, and anti-IL-6 antibodies (n = 4), suggesting that endogenously produced GM-CSF, IL-3, and IL-6 may play a role in the PDGF-induced CFU-GM proliferation. Furthermore, PDGF (1 to 100 ng/mL) did not show any effect on CFU-GM proliferation when replacing bone marrow MNC with immunomagnetic selection-enriched CD34+ cells from human cord blood (n = 5; purity, 91% +- 6.5%).This study indicates that PDGF may indirectly enhance CFU-GM proliferation by inducing the bone marrow stromal cells to produce GM-CSF, IL-3, or IL-6.
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Yang, M., Li, K., Lam, A.C. et al. Platelet-Derived Growth Factor Enhances Granulopoiesis Via Bone Marrow Stromal Cells. Int J Hematol 73, 327–334 (2001). https://doi.org/10.1007/BF02981957
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DOI: https://doi.org/10.1007/BF02981957