alexa Role of tumour necrosis factor in lung injury caused by intestinal ischaemia-reperfusion.
Chemistry

Chemistry

Modern Chemistry & Applications

Author(s): Kksoy C, Kuzu MA, Kuzu I, Ergn H, Grhan I

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Abstract BACKGROUND: Despite the well known inflammatory effects of tumour necrosis factor alpha (TNF), the mechanism of TNF-mediated lung injury following ischaemia-reperfusion (I/R) is still unclear. In this study, the role of TNF in the development of acute lung injury following intestinal I/R was investigated. METHODS: Male Wistar rats underwent either sham operation (n = 10), 1 h of superior mesenteric artery occlusion and 2 h of reperfusion (I/R, n = 10), or pretreatment with anti-TNF polyclonal antibody 2 mg/kg and I/R (n = 6). Lung injury was evaluated by Evans blue dye concentration, immunohistochemical staining and morphometric analysis. Intestinal injury was assessed by Evans blue dye concentration and histological examination. RESULTS: Intestinal I/R resulted in lung injury characterized by an increase in Evans blue dye concentration, neutrophil sequestration, and obvious staining for expression of pulmonary CD11b and CD18. Pretreatment of animals with anti-TNF antibody led to a reduction in the sequestration of neutrophils, and a decrease in expression of pulmonary intracellular adhesion molecule 1 and CD18. Anti-TNF antibody pretreatment also reduced the intestinal microvascular injury but not histological grade after intestinal I/R. CONCLUSION: Treatment with an anti-TNF antibody resulted in a significant attenuation of lung injury following intestinal I/R. The data indicate that TNF is an important trigger for upregulation of pulmonary endothelial and neutrophil adhesion molecules after intestinal I/R. This article was published in Br J Surg and referenced in Modern Chemistry & Applications

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