title: Role of macrophage colony-stimulating factor in the differentiation and expansion of monocytes and dendritic cells from CD34+ progenitor cells.
abstract: The present study focused on whether it is possible to expand monocytic cells from CD34+ progenitor cells by using macrophage colony-stimulating factor (M-CSF) in the absence and presence of mast cell growth factor (MGF) and IL-6. It was demonstrated that CD34+ cells differentiate without expansion to functional mature monocytic cells in the presence of M-CSF or combinations of M-CSF plus IL-6 and MGF. A different response pattern was observed for the number of clonogenic cells. The addition of IL-6 or both IL-6 and MGF to M-CSF containing cultures resulted in significant higher numbers of colony-forming unit-macrophage (CFU-M) as tested in clonogenic and 3H-thymidine assays. Furthermore, M-CSF plus both IL-6 and MGF appeared to be the most potent combination to preserve the monocytic precursor in cell suspension culture assays. These results indicate that IL-6 and MGF in conjunction with M-CSF affect CD34+ cells especially at precursor level without distinct effect on the more mature stages. Secondly we studied whether M-CSF is only critical for the monocytic lineage or also affects dendritic cell (DC) development. Indeed, we were able to culture CD83+ DC from CD34+ progenitor cells in the presence of M-CSF in conjunction with TNF-alpha, IL-4, and MGF although their absolute number is almost threefold lower than the number of CD83+ cells yielded from GM-CSF plus TNF-alpha, IL-4, and MGF stimulated CD34+ cells.
authors.affiliation: Department of Internal Medicine, University of Groningen, The Netherlands.
authors.forename: A W
authors.initials: AW
authors.lastname: Kamps
authors.forename: D
authors.initials: D
authors.lastname: Hendriks
authors.forename: J W
authors.initials: JW
authors.lastname: Smit
authors.forename: E
authors.initials: E
authors.lastname: Vellenga
mesh_terms: D018952:Antigens, CD34; D002454:Cell Differentiation / Q000187:drug effects*; D002455:Cell Division; D003713:Dendritic Cells / Q000166:cytology* / Q000187:drug effects / Q000276:immunology; D006801:Humans; D007124:Immunoenzyme Techniques; D015850:Interleukin-6 / Q000494:pharmacology; D016173:Macrophage Colony-Stimulating Factor / Q000494:pharmacology*; D009000:Monocytes / Q000166:cytology* / Q000187:drug effects / Q000276:immunology; D010587:Phagocytosis; D010641:Phenotype; D019089:Stem Cell Factor / Q000494:pharmacology; D013234:Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000276:immunology
chemical_list: D018952:Antigens, CD34; D015850:Interleukin-6; D019089:Stem Cell Factor; D016173:Macrophage Colony-Stimulating Factor