title: The effects of interleukin-10 on interleukin-1 receptor antagonist and interleukin-1 beta production in human monocytes and neutrophils.
abstract: LPS stimulates human monocytes and neutrophils to produce IL-1 beta and IL-1 receptor antagonist (IL-1ra). IL-10 has been shown to inhibit LPS-induced IL-1 beta production in human monocytes. The objective of these studies was to examine the effects of IL-10 on human monocyte and neutrophil IL-1ra protein and mRNA production and compare it to IL-1 beta. IL-10 markedly inhibited LPS-induced IL-1 beta mRNA and protein production in both cell types. IL-10 alone induced IL-1ra mRNA production in monocytes with a low level of protein production. Furthermore, IL-10 led to enhanced levels of IL-1ra mRNA in LPS-induced monocytes at 2 to 6 h and of IL-1ra protein at 4-16 h, but there was no increase in levels of IL-1ra protein at 24 h or later. In neutrophils IL-10 alone did not stimulate IL-1ra protein or mRNA production and did not augment LPS-induced IL-1ra mRNA. These net effects of IL-10 resulted in an increase in the ratio of IL-1ra to IL-1 beta in both neutrophils and monocytes. The net effects of IL-10 on inflammatory cells may be important in modulation of biologic responses to IL-1.
authors.affiliation: Department of Medicine, University of Colorado Health Sciences Center, Denver 80262.
authors.forename: J K
authors.initials: JK
authors.lastname: Jenkins
authors.forename: M
authors.initials: M
authors.lastname: Malyak
authors.forename: W P
authors.initials: WP
authors.lastname: Arend
mesh_terms: D002478:Cells, Cultured; D006801:Humans; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1 / Q000096:biosynthesis* / Q000235:genetics; D016753:Interleukin-10 / Q000494:pharmacology*; D008070:Lipopolysaccharides / Q000494:pharmacology; D009000:Monocytes / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D009504:Neutrophils / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017472:Receptors, Interleukin-1 / Q000037:antagonists & inhibitors; D012795:Sialoglycoproteins / Q000096:biosynthesis* / Q000235:genetics
chemical_list: C507763:IL1RN protein, human; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1; D008070:Lipopolysaccharides; D012333:RNA, Messenger; D017472:Receptors, Interleukin-1; D012795:Sialoglycoproteins; D016753:Interleukin-10