Abstract
Hepatocyte growth factor (HGF), also known as scatter factor (SF), is produced by mesenchymal cells, including bone marrow (BM) stromal cells, and has mitogenic and motogenic effects on a variety of cell types. Recently, a role has been assigned to HGF/SF and its receptor, c-MET, in both normal and malignant hemopoiesis. We investigated the function of HGF/SF on hemopoietic mononuclear cells (MNC) from patients with acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS) with circulating blasts. In contrast to results with normal MNC, HGF/SF alone stimulated the proliferation and colony formation of MNC from these patients. MNC from some (4/13) of the AML patients also produced HGF/SF (0.1–0.2 ng/ml/day), while we could not detect HGF/SF in cultures from normal MNC. Furthermore, it appeared that HGF/SF induced migration of leukemic cells in Boyden using KG1a cells as a model for leukemic blasts. The membranes dividing the two compartments of the Boyden chambers were coated with fibronectin. HGF/SF significantly promoted migration in 3/5 samples of MDS patients and in 5/7 samples of AML patients. Supernatant of human BM stromal cells, which is chemoattractive for normal human hemopoietic progenitor cells, also promoted migration of MNC from 4/5 MDS patients and 6/7 AML patients. Since HGF/SF is one of the growth factors produced by BM stromal cells, a neutralizing antibody directed against HGF/SF was added to the BM stroma supernatant, which reduced migration significantly in 2/3 MDS and in 3/6 AML responders to BM stroma supernatant. In conclusion, HGF/SF promotes proliferation and migration of hemopoietic cells from AML and MDS patients in vitro and may therefore contribute to the malignant potential of these cells.
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Weimar, I., Voermans, C., Bourhis, JH. et al. Hepatocyte growth factor/scatter factor (HGF/SF) affects proliferation and migration of myeloid leukemic cells. Leukemia 12, 1195–1203 (1998). https://doi.org/10.1038/sj.leu.2401080
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DOI: https://doi.org/10.1038/sj.leu.2401080
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