Interleukin-1 receptor mRNA expression in activated bovine leukocytes in vitro.
Interleukin-1 (IL-1) is a key player in inflammation and the immune response. To better understand the complex interactions of IL-1 and its receptors in inflammation, we need to investigate how type I and type II IL-1 receptors (IL-1RI and IL-1RII) are regulated by cytokines and other mediators. Using semiquantitative reverse transcriptase PCR and Northern analysis, we examined the regulation of IL-1RI and IL-1RII mRNA levels in bovine polymorphonuclear leukocytes (PMNs) (i.e., neutrophils) and peripheral blood mononuclear cells (PBMCs) in vitro. IL-1RI mRNA levels were up-regulated in PBMCs by recombinant bovine IL-1beta (rBoIL-1beta), recombinant bovine granulocyte-macrophage colony-stimulating factor (rBoGM-CSF), rBoIL-4, recombinant bovine gamma interferon (rBoIFN-gamma), and dexamethasone. IL-1RI mRNA was increased in bovine PMNs exposed to rBoGM-CSF, rBoIL-4, and dexamethasone but was down-regulated by rBoIL-1beta and rBoIFN-gamma. IL-1RII mRNA was increased in bovine PBMCs and PMNs after exposure to rBoIL-1beta, rBoGM-CSF, rBoIL-4, and dexamethasone. In contrast, rBoIFN-gamma down-regulated the expression of bovine IL-1RII mRNA in PBMCs. These findings suggest that the expression of bovine IL-1RI and IL-1RII mRNAs is regulated differently by certain soluble stimuli (e.g., IFN-gamma) in PMNs and PBMCs.
Yu
P W
PW
Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 53706, USA.
Schuler
L A
LA
Czuprynski
C J
CJ
D000818:Animals; D015152:Blotting, Northern; D002417:Cattle; D002478:Cells, Cultured; D007375:Interleukin-1 / Q000097:blood / Q000502:physiology; D008213:Lymphocyte Activation / Q000502:physiology*; D009504:Neutrophils / Q000378:metabolism / Q000648:ultrastructure*; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000097:blood*; D017472:Receptors, Interleukin-1 / Q000097:blood*; D014158:Transcription, Genetic
D007375:Interleukin-1; D012333:RNA, Messenger; D017472:Receptors, Interleukin-1