title: Production of IL-1Ra by human mononuclear blood cells in vitro: influence of serum factors.
abstract: In vitro cell culture models that measure cytokine production can be of great value when analyzing regulatory mechanisms underlying various pathological conditions. However, testing the function of peripheral blood cells has to take into consideration that serum factors are likely to be of importance in maintaining their function. Interleukin-1 receptor antagonist (IL-1Ra) is a cytokine of key importance in immune regulation and is believed to be involved in numerous pathological processes, such as autoimmunity and cancer. We investigated the influence of normal, human serum on spontaneous production of IL-1Ra by human peripheral blood mononuclear cells (PBMC) in vitro. IL-1Ra production in vitro spanned over a wide range of concentrations, which could be attributed to a combined effect of both cellular parameters and properties of the serum used. The production of IL-1Ra in vitro could be correlated to the level of immobilized IgG, especially IgG1 and IgG3, which is adsorbed from the serum and bound to the tissue culture wells during culture. However, the amount of serum IgG adsorbed to the tissue culture wells could not necessarily be predicted based on the serum concentration of IgG.
authors.affiliation: Department of Oncology, Division of Clinical Tumourimmunology, University Hospital of Linköping, S-581 85 Linköping, Sweden. Birgitta.Clinchy@lio.se
authors.forename: Birgitta
authors.initials: B
authors.lastname: Clinchy
authors.forename: Marie
authors.initials: M
authors.lastname: Gunnerås
authors.forename: Annika
authors.initials: A
authors.lastname: Håkansson
authors.forename: Leif
authors.initials: L
authors.lastname: Håkansson
mesh_terms: D001685:Biological Factors / Q000494:pharmacology*; D002448:Cell Adhesion; D006801:Humans; D007074:Immunoglobulin G / Q000145:classification / Q000276:immunology; D053590:Interleukin 1 Receptor Antagonist Protein; D007963:Leukocytes, Mononuclear / Q000166:cytology / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism*; D009194:Myeloma Proteins / Q000378:metabolism; D011485:Protein Binding; D044967:Serum / Q000737:chemistry*; D012795:Sialoglycoproteins / Q000096:biosynthesis*
chemical_list: D001685:Biological Factors; C507763:IL1RN protein, human; D007074:Immunoglobulin G; D053590:Interleukin 1 Receptor Antagonist Protein; D009194:Myeloma Proteins; D012795:Sialoglycoproteins