Abstract
Abstract ACE inhibitors have been proven to be effective in the reduction of ischemia/reperfusion damage after myocardial ischemia. In an attempt to investigate this effect in a model of syngeneic liver transplantation in the rat, we compared a control group with an ACE inhibitor treatment group, in which enalapril was given i.v. before and during re-perfusion. By means of in vivo microscopy, sinusoidal perfusion rate, permanent leukocyte sticking in sinusoids and postsinusoidal venules, and leukocyte rolling in postsinusoidal venules were assessed. Liver function was evaluated by measuring bile output. The sinusoidal perfusion rate was significantly improved by enalapril treatment. Leukocyte sticking in both sinusoids and postsinusoidal venules was found to be remarkably reduced in enalapril-treated animals; the fraction of rolling leukocytes remained unchanged. Bile output was increased in enala-pril-treated animals. These results demonstrated, in a model of rat liver transplantation, that ACE inhibition by enalapril is effective in reducing hepatic ischemidreperfusion damage as assessed by the leukocyte-en-dothelium interaction using in vivo microscopy and postreperfusion bile production.
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