title: Hemopoietic functions of marrow-derived osteogenic cells.
abstract: Osteoblasts, members of the marrow stromal cellular network, may play an active role in the hemopoietic microenvironment as well as in bone remodeling. In this study, we examined the extent to which marrow-derived osteogenic cells (MBA-15) possess various stromal functions. This marrow stromal-derived cell line was shown by us to exhibit osteoblastic characteristics in culture and to form bone in vivo. These cells are shown here to constitutively produce and secrete cytokines identified as M-CSF, GM-CSF, and IL-6. MBA-15 cells modulate growth of normal and malignant myeloid and lymphoid cells as well as leukemia cell lines in vitro. Cell-cell interactions were studied in co-cultures with adherent MBA-15 cells and the target hemopoietic cells. Growth inhibition effects, observed under various experimental conditions, can be attributed to the presence of different soluble and membrane-bound inhibitory activities produced by MBA-15 cells. Thus, MBA-15 cells spontaneously produce both stimulators and inhibitors that can affect myeloid and lymphoid cell growth. Marrow osteogenic cells may therefore participate in the stromal regulation of hemopoiesis.
authors.affiliation: Department of Histology and Cell Biology, Sackler Faculty of Medicine, Tel-Aviv University, Ramat-Aviv, Israel.
authors.forename: D
authors.initials: D
authors.lastname: Benayahu
authors.forename: M
authors.initials: M
authors.lastname: Horowitz
authors.forename: D
authors.initials: D
authors.lastname: Zipori
authors.forename: S
authors.initials: S
authors.lastname: Wientroub
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D001853:Bone Marrow / Q000378:metabolism / Q000502:physiology; D001854:Bone Marrow Cells; D002450:Cell Communication / Q000502:physiology; D002455:Cell Division / Q000502:physiology; D002478:Cells, Cultured; D003094:Collagen / Q000378:metabolism; D003907:Dexamethasone / Q000494:pharmacology; D015232:Dinoprostone / Q000494:pharmacology; D005109:Extracellular Matrix / Q000187:drug effects / Q000378:metabolism; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D006410:Hematopoiesis / Q000187:drug effects / Q000502:physiology*; D016173:Macrophage Colony-Stimulating Factor / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D010006:Osteoblasts / Q000166:cytology* / Q000378:metabolism / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D010281:Parathyroid Hormone / Q000494:pharmacology; D010641:Phenotype
chemical_list: D010281:Parathyroid Hormone; D003907:Dexamethasone; D016173:Macrophage Colony-Stimulating Factor; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D003094:Collagen; D000469:Alkaline Phosphatase; D015232:Dinoprostone