title: Methylprednisolone differentially regulates IL-10 and tumour necrosis factor (TNF) production during murine endotoxaemia.
abstract: IL-10 is an endogenous antiinflammatory cytokine that inhibits TNF biosynthesis and protects mice from lipopolysaccharide (LPS)-induced lethality. As synthetic glucocorticoids are widely used as antiinflammatory agents, we analysed the effects of methylprednisolone administration on IL-10 biosynthesis during murine endotoxaemia. We found that low doses of methylprednisolone (2-10 mg/kg) markedly inhibited TNF production but did not affect serum levels of IL-10, while a high methylprednisolone dose (50 mg/kg) increased LPS-induced IL-10 levels. In parallel, we observed that LPS-induced IL-10 production is TNF-independent in this experimental setting. Experiments conducted in vitro indicated that methylprednisolone (from 0.01 to 100 micrograms/ml) also increased the biosynthesis of IL-10 by LPS-activated mouse peritoneal macrophages. We conclude that methylprednisolone differentially regulates IL-10 and TNF production induced by LPS both in vivo and in vitro at the macrophage level.
authors.affiliation: Laboratoire d'immunologie Expérimentale, Université Libre de Bruxelles, Belgium.
authors.forename: A
authors.initials: A
authors.lastname: Marchant
authors.forename: Z
authors.initials: Z
authors.lastname: Amraoui
authors.forename: C
authors.initials: C
authors.lastname: Gueydan
authors.forename: C
authors.initials: C
authors.lastname: Bruyns
authors.forename: O
authors.initials: O
authors.lastname: Le Moine
authors.forename: P
authors.initials: P
authors.lastname: Vandenabeele
authors.forename: W
authors.initials: W
authors.lastname: Fiers
authors.forename: W A
authors.initials: WA
authors.lastname: Buurman
authors.forename: M
authors.initials: M
authors.lastname: Goldman
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D000818:Animals; D019446:Endotoxemia / Q000276:immunology* / Q000378:metabolism; D005260:Female; D016753:Interleukin-10 / Q000096:biosynthesis*; D008070:Lipopolysaccharides / Q000494:pharmacology; D008264:Macrophages / Q000187:drug effects / Q000378:metabolism; D008775:Methylprednisolone / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis* / Q000187:drug effects
chemical_list: D000276:Adjuvants, Immunologic; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D008775:Methylprednisolone