PMID- 11477102 OWN - NLM STAT- MEDLINE DCOM- 20011204 LR - 20230309 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 276 IP - 40 DP - 2001 Oct 5 TI - A novel role for interleukin-18 in adhesion molecule induction through NF kappa B and phosphatidylinositol (PI) 3-kinase-dependent signal transduction pathways. PG - 37069-75 AB - Interleukin-18 (IL-18) is a novel proinflammatory cytokine found in serum and joints of patients with rheumatoid arthritis (RA). We studied a novel role for IL-18 in mediating cell adhesion, a vital component of the inflammation found in RA and other inflammatory diseases. We examined the expression of cellular cell adhesion molecules E-selectin, vascular cell adhesion molecule-1 (VCAM-1), and intercellular adhesion molecule-1 (ICAM-1) on endothelial cells and RA synovial fibroblasts using flow cytometry. Adhesion of the monocyte-like cell line HL-60 to endothelial cells was determined by immunofluorescence. IL-18 significantly enhanced ICAM-1 and VCAM-1 expression on endothelial cells and RA synovial fibroblasts. In addition, IL-18 induced E-selectin expression on endothelial cells and promoted the adhesion of HL-60 cells to IL-18-stimulated endothelial cells. Neutralizing anti-VCAM-1 and anti-E-selectin could completely inhibit HL-60 adherence to endothelial cells. IL-18-induced adhesion molecule expression appears to be mediated through nuclear factor kappa B (NF kappa B) and phosphatidyl-inositol 3 kinase (PI 3-kinase) since addition of inhibitors to either NF kappa B (pyrrolidine dithiocarbamate and N-acetyl-l-cysteine) or PI 3-kinase (LY294002) inhibited RA synovial fibroblast VCAM-1 expression by 50 to 60%. Addition of both inhibitors resulted in inhibition of VCAM-1 expression by 85%. In conclusion, the ability of IL-18 to induce adhesion molecule expression on endothelial cells and RA synovial fibroblasts indicates that IL-18 may contribute to RA joint inflammation by enhancing the recruitment of leukocytes into the joint. IL-18 requires NF kappa B as well as PI 3-kinase to induce VCAM-1 on RA synovial fibroblasts, suggesting that there may be two distinct pathways in IL-18-induced adhesion molecule expression. FAU - Morel, J C AU - Morel JC AD - Northwestern University Medical School, Department of Medicine, Chicago, Illinois, 60611, USA. FAU - Park, C C AU - Park CC FAU - Woods, J M AU - Woods JM FAU - Koch, A E AU - Koch AE LA - eng GR - AI-40987/AI/NIAID NIH HHS/United States GR - HL-58695/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. DEP - 20010727 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Antibodies, Monoclonal) RN - 0 (Antioxidants) RN - 0 (E-Selectin) RN - 0 (Interleukin-18) RN - 0 (NF-kappa B) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) RN - 0 (Pyrrolidines) RN - 0 (Thiocarbamates) RN - 0 (Vascular Cell Adhesion Molecule-1) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - 25769-03-3 (pyrrolidine dithiocarbamic acid) RN - WYQ7N0BPYC (Acetylcysteine) SB - IM MH - Acetylcysteine/pharmacology MH - Antibodies, Monoclonal/pharmacology MH - Antioxidants/pharmacology MH - Arthritis, Rheumatoid/metabolism/pathology MH - Cell Adhesion/drug effects MH - E-Selectin/immunology/metabolism MH - Endothelium, Vascular/drug effects/metabolism MH - Fibroblasts/drug effects/metabolism MH - HL-60 Cells MH - Humans MH - Intercellular Adhesion Molecule-1/metabolism MH - Interleukin-18/*pharmacology MH - NF-kappa B/*physiology MH - Phosphatidylinositol 3-Kinases/*physiology MH - Phosphoinositide-3 Kinase Inhibitors MH - Pyrrolidines/pharmacology MH - Signal Transduction/*physiology MH - Synovial Fluid/drug effects/metabolism MH - Thiocarbamates/pharmacology MH - Vascular Cell Adhesion Molecule-1/immunology/metabolism EDAT- 2001/07/31 10:00 MHDA- 2002/01/05 10:01 CRDT- 2001/07/31 10:00 PHST- 2001/07/31 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/07/31 10:00 [entrez] AID - S0021-9258(19)56641-8 [pii] AID - 10.1074/jbc.M103574200 [doi] PST - ppublish SO - J Biol Chem. 2001 Oct 5;276(40):37069-75. doi: 10.1074/jbc.M103574200. Epub 2001 Jul 27.