title: Regulation of human monocyte DNA synthesis by colony-stimulating factors, cytokines, and cyclic adenosine monophosphate.
abstract: It is reported in this study that a subpopulation of highly purified human peripheral blood human monocytes can proliferate in response to colony-stimulating factor-1 (CSF-1), granulocyte-macrophage colony-stimulating factor (GM-CSF), and interleukin-3 (IL-3). Both GM-CSF and IL-3 synergized with CSF-1 for the induction of DNA synthesis. Given the DNA synthesis levels attained, we were able to test the effects of certain cytokines and cyclic adenosine monophosphate (cAMP)-elevating agents, which have been shown to modulate in vitro human myelopoiesis and murine macrophage proliferation. The cytokines, interferon-gamma (IFN-gamma), interleukin-4 (IL-4), and tumor necrosis factor-alpha (TNF-alpha), as well as cAMP-elevating agents, 8-bromoadenosine 3':5'-cyclic monophosphate (8BrcAMP), cholera toxin (CT), and prostaglandin E2 (PGE2), suppressed the monocyte DNA synthesis due to CSF-1. These results parallel those reported with human bone marrow progenitors, as well as murine macrophage populations. The cycling human monocyte population could provide a model cell type to understand the molecular events controlling human myelopoiesis.
authors.affiliation: University of Melbourne, Department of Medicine, Royal Melbourne Hospital, Parkville, Australia.
authors.forename: D L
authors.initials: DL
authors.lastname: Cheung
authors.forename: J A
authors.initials: JA
authors.lastname: Hamilton
mesh_terms: D015124:8-Bromo Cyclic Adenosine Monophosphate / Q000494:pharmacology*; D002452:Cell Count / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D002772:Cholera Toxin / Q000494:pharmacology; D003470:Culture Media; D000242:Cyclic AMP / Q000378:metabolism*; D004261:DNA Replication / Q000187:drug effects*; D015232:Dinoprostone / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology*; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology*; D016173:Macrophage Colony-Stimulating Factor / Q000494:pharmacology*; D009000:Monocytes / Q000166:cytology / Q000187:drug effects / Q000502:physiology*; D011994:Recombinant Proteins / Q000494:pharmacology; D013936:Thymidine / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D003470:Culture Media; D007377:Interleukin-3; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D015124:8-Bromo Cyclic Adenosine Monophosphate; D016173:Macrophage Colony-Stimulating Factor; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D002772:Cholera Toxin; D000242:Cyclic AMP; D015232:Dinoprostone; D013936:Thymidine