title: Establishment and characterization of factor-dependent macrophage cell lines.
abstract: Three macrophage cell lines from bone marrow cells of C3H/HeN mice were isolated by successive transfer of the cells in culture with L-cell-conditioned medium (LCM) or WEHI-3 cell-conditioned medium (WEHI-3CM). These cell lines, which express Fc receptors, are involved in Fc-mediated phagocytosis and possess nonspecific esterase activity. Two (BDM-1 and BDM-2) of three cell lines show dependency for growth on either macrophage colony-stimulating factor (M-CSF) (CSF-1) or granulocyte-macrophage colony-stimulating factor (GM-CSF) and do not respond to interleukin 3 (IL-3). The third clone (BDM-3) proliferates in response to IL-3 as well as to GM-CSF and weakly responds to M-CSF and to interleukin 4 (IL-4). GM-CSF, in combination with the suboptimal concentration of M-CSF, acted synergistically on the proliferation of BDM-1 cells. The tumor-promoting phorbol diester, 12-o-tetradecanoyl-phorbol-13-acetate (TPA) also acted synergistically with the three CSFs (IL-3, GM-CSF, and M-CSF) to stimulate the proliferation of BDM-1 cells. The synergistic effect was observed when cells were pretreated with TPA and subsequently stimulated with IL-3. The calcium ionophore A23187 enhanced the proliferation of BDM-1 cells costimulated with TPA and IL-3. These factor-dependent macrophage cell lines should be useful for studying signal transduction mechanisms in the regulation of cell growth.
mesh_terms: D000818:Animals; D000001:Calcimycin / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D003115:Colony-Stimulating Factors / Q000494:pharmacology*; D003470:Culture Media; D004357:Drug Synergism; D007377:Interleukin-3 / Q000494:pharmacology; D008264:Macrophages / Q000166:cytology* / Q000187:drug effects; D051379:Mice; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D003115:Colony-Stimulating Factors; D003470:Culture Media; D007377:Interleukin-3; D000001:Calcimycin; D013755:Tetradecanoylphorbol Acetate