title: Down-regulation of endothelial adhesion molecules and leukocyte adhesion by treatment with superoxide dismutase is beneficial in chronic immune experimental colitis.
abstract: Modulation of adhesion molecule expression that govern trafficking of leukocytes into the inflamed intestine is envisioned as a new strategy for treatment of inflammatory bowel disease (IBD). This study was designed to determine the impact of reducing oxidative stress on adhesion molecules expression and leukocyte recruitment in experimental chronic colitis. For that purpose, colitic interleukin-10 knockout and wild-type mice were studied. Groups of animals were treated with Cu/Zn superoxide dismutase (SOD1) 13 mg/kg/d or vehicle for either 7 or 14 days. Expression of vascular cell adhesion molecule-1 and mucosal addressin cell adhesion molecule-1 were determined; leukocyte-endothelial cell interactions in colonic venules were studied with intravital microscopy; and changes in colon pathology and biomarkers of colitis severity were determined. Development of colitis was associated with a marked increase in endothelial vascular cell adhesion molecule-1 and mucosal addressin cell adhesion molecule-1 expression, which were significantly reduced by treatment with SOD1. The increase in leukocyte rolling and adhesion in colonic venules of colitic mice were significantly reduced by administration of SOD1. This treatment markedly reduced colonic lipid hydroperoxidation, myeoloperoxidase activity, and plasma levels of serum amyloid A protein and resulted in significant, although modest, reductions in histologic damage score. The therapeutic value of SOD1 when administered prophylactically was assessed in the dextran sulfate sodium model of colitis with similar positive results. These results indicate that SOD1 affords significant amelioration of colonic inflammatory changes in experimental colitis. Down-regulation of adhesion molecule expression, reduction of lipid hydroperoxidation, and recruitment of leukocytes into the inflamed intestine contribute to this beneficial effect.
authors.affiliation: Department of Gastroenterology, Hospital Clínic, Institut de Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Spain.
authors.forename: Joaquim
authors.initials: J
authors.lastname: Seguí
authors.forename: Fèlix
authors.initials: F
authors.lastname: Gil
authors.forename: Meritxell
authors.initials: M
authors.lastname: Gironella
authors.forename: Manuel
authors.initials: M
authors.lastname: Alvarez
authors.forename: Mercedes
authors.initials: M
authors.lastname: Gimeno
authors.forename: Pilar
authors.initials: P
authors.lastname: Coronel
authors.forename: Daniel
authors.initials: D
authors.lastname: Closa
authors.forename: Josep M
authors.initials: JM
authors.lastname: Piqué
authors.forename: Julián
authors.initials: J
authors.lastname: Panés
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D002448:Cell Adhesion; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D003092:Colitis / Q000188:drug therapy* / Q000378:metabolism* / Q000473:pathology; D004195:Disease Models, Animal; D016166:Free Radical Scavengers / Q000627:therapeutic use*; D016753:Interleukin-10; D036904:Leukocyte Rolling; D008054:Lipid Peroxides / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D012720:Severity of Illness Index; D013482:Superoxide Dismutase / Q000627:therapeutic use*; D000072105:Superoxide Dismutase-1
chemical_list: D015415:Biomarkers; D015815:Cell Adhesion Molecules; D016166:Free Radical Scavengers; D008054:Lipid Peroxides; D016753:Interleukin-10; C000606291:Sod1 protein, mouse; D013482:Superoxide Dismutase; D000072105:Superoxide Dismutase-1