title: Differential gene regulation of interleukin-1 ligands and receptors in bovine peripheral blood neutrophils and mononuclear cells in response to E. coli lipopolysaccharide (LPS).
abstract: The proinflammatory cytokine, interleukin-1, plays a prominent role in the inflammatory reactions that characterize numerous diseases. In this study, we examined the gene expression for bovine IL-1 ligands and receptors by bovine peripheral blood mononuclear cells (MNCs) and neutrophils (PMNs) in response to E. coli lipopolysaccharide (LPS) in vitro. Gene expression of mRNA for IL-1alpha, IL-1beta, IL-1 receptor antagonist (IL-1ra), type 1 IL-1 receptor, type 2 IL-1 receptor, and IL-1 beta converting enzyme (ICE), were measured by a semi-quantitative RT-PCR technique. LPS had little effect on type 1 IL-1R expression in MNC, whereas, it strongly up-regulated type 1 IL-1R expression in PMNs. Co-incubation of PMNs with LPS and bovine recombinant IL-1beta had little additional effect on type 1 IL-1R expression. Incubation of MNCs with LPS resulted in up-regulation of IL-1beta, IL-1ra, and type 2 IL-1R, no change in IL-1alpha, and a decrease in ICE gene expression. Incubation of PMNs with LPS up-regulated IL-1beta gene expression, whereas, IL-1alpha, IL-1ra, type 2 IL-1R and ICE were unchanged. This study provides evidence for differential regulation of gene products of the bovine IL-1 family by peripheral blood mononuclear cells (MNC) and neutrophils (PMNs) in response to E. coli LPS.
authors.affiliation: Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI 53706, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Beckman
authors.forename: J
authors.initials: J
authors.lastname: Sotos
authors.forename: F
authors.initials: F
authors.lastname: Leite
authors.forename: L A
authors.initials: LA
authors.lastname: Schuler
authors.forename: C J
authors.initials: CJ
authors.lastname: Czuprynski
mesh_terms: D000818:Animals; D002417:Cattle / Q000276:immunology*; D004926:Escherichia coli / Q000472:pathogenicity; D005786:Gene Expression Regulation / Q000187:drug effects*; D007375:Interleukin-1 / Q000235:genetics*; D007963:Leukocytes, Mononuclear / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology*; D009504:Neutrophils / Q000378:metabolism*; D017472:Receptors, Interleukin-1 / Q000235:genetics*
chemical_list: D007375:Interleukin-1; D008070:Lipopolysaccharides; D017472:Receptors, Interleukin-1