title: Synergistic effects of interleukin-1 beta and interleukin-3 on the expansion of human hematopoietic progenitor cells in liquid cultures.
abstract: In the present study, we show that recombinant human interleukin-1 beta (rhIL-1 beta), which has no effect on the proliferation of human progenitor cells, has synergistic effects on the expansion of human progenitor cells induced by rhIL-3 in liquid cultures. The synergistic effects of rhIL-1 beta with rhIL-3 were observed in liquid cultures using not only fresh bone marrow mononuclear cells, but also selected populations of nonadherent cells, non-T nonadherent cells, and CD34-positive cells. Anti-granulocyte-macrophage colony-stimulating factor (anti-GM-CSF) antibody partially blocked the synergistic effects of rhIL-1 beta on the proliferation of colony-forming unit (CFU)-GM burst-forming unit-erythroid (BFU-E), and CFU-Mix in liquid cultures in the presence of rhIL-1 beta plus rhIL-3, suggesting that the synergistic effects of rhIL-1 beta plus rhIL-3 are explained in part by the secondary production of GM-CSF. Limiting dilution assays and liquid culture assays using CD34-positive cells indicate that rhIL-1 beta directly increases the numbers of colony-forming cells in liquid cultures. These results suggest that rhIL-1 beta has unique direct and indirect effects on the expansion of hematopoietic progenitor cells in liquid cultures.
authors.affiliation: Third Department of Internal Medicine, Hokkaido University School of Medicine, Sapporo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kobayashi
authors.forename: M
authors.initials: M
authors.lastname: Imamura
authors.forename: Y
authors.initials: Y
authors.lastname: Gotohda
authors.forename: S
authors.initials: S
authors.lastname: Maeda
authors.forename: H
authors.initials: H
authors.lastname: Iwasaki
authors.forename: K
authors.initials: K
authors.lastname: Sakurada
authors.forename: M
authors.initials: M
authors.lastname: Kasai
authors.forename: A J
authors.initials: AJ
authors.lastname: Hapel
authors.forename: T
authors.initials: T
authors.lastname: Miyazaki
mesh_terms: D000906:Antibodies / Q000502:physiology; D015703:Antigens, CD / Q000032:analysis; D018952:Antigens, CD34; D002455:Cell Division / Q000187:drug effects; D004357:Drug Synergism; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000276:immunology; D006801:Humans; D007201:Indicator Dilution Techniques; D007375:Interleukin-1 / Q000494:pharmacology*; D007377:Interleukin-3 / Q000494:pharmacology*; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: D000906:Antibodies; D015703:Antigens, CD; D018952:Antigens, CD34; D007375:Interleukin-1; D007377:Interleukin-3; D011994:Recombinant Proteins