Effects of intestinal stasis on intercellular adhesion molecule 1 expression in the rat: role of enteric bacteria

Gastroenterology
S KomatsuD N Granger

Abstract

The mechanisms underlying the inflammatory changes associated with intestinal stasis are poorly understood. The objective of this study was to assess whether endothelial expression of intercellular adhesion molecule 1 (ICAM-1) and leukocyte recruitment are altered after intestinal stasis. ICAM-1 expression and granulocyte recruitment were quantified in different tissues of Sprague-Dawley rats using the double-radiolabeled monoclonal antibody technique and peroxidase activity, respectively. Both constitutive and endotoxin-induced ICAM-1 expression were significantly higher in the cecum than in distal colon, a finding that cannot be explained by a difference in endothelial surface area between the two organs. Surgical procedures to improve cecal stool flow (cecostomy, ileocecostomy) elicited a significant decrease in constitutive ICAM-1 expression in both cecum and distal colon. Tissue peroxidase activity was normally higher in cecum than in distal colon, and this difference was significantly reduced by ileocecostomy. Oral administration of antibiotics (kanamycin and/or metronidazole for 2 days) significantly reduced constitutive ICAM-1 expression in the cecum, but not in the distal colon. This study indicates that intestinal sta...Continue Reading

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