Effects of heme oxygenase-1 mediated by cell penetrating peptide PEP-1 on liver injury induced by intestinal ischemia/reperfusion in rats / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the effects of heme oxygenase-1 (HO-1) mediated by cell penetrating peptide PEP-1 on liverinjury induced by intestinal ischemia/reperfusion (I/R) in rats.Methods Twenty-four male Sprague-Dawley rats,aged 7-9 weeks,weighing 210-260 g,were randomly divided into 3 groups (n =8 each)sham operation group (group S),intestinal I/R group (group I/R) and PEP-1/HO-1 group (group HO).To establish a model of intestinal I/R,intestines were exteriorized and the superior mesenteric artery was exposed and occluded for 45 min ischemia,and then the clamp was removed for 120 min reperfusion.The PEP-1/HO-1 fusion protein 0.5 mg was injectedvia ihe left iliac vein 30 min prior to ischemia in group HO.The superior mesenteric artery was only exposed but not occluded in group S.At the end of reperfusion,blood samples were collected from the right common carotid artery for measurement of serum aspartate aminotransferase (AST),alanine aminotransferase (ALT) activities.The rats were then sacrificed and livers were removed for microscopic examination and for determination of malondialdehyde (MDA) content and superoxide dismutase (SOD) activity in livertissues.Results Compared with group S,serum AST and ALT activities and MDA content in liver tissues were significantly increased,while SOD activity in liver tissues was decreased in groups I/R and HO (P ＜ 0.05).Compared with group I/R,serum AST and ALT activities and MDA content in liver tissues were significantly decreased,while SOD activity in liver tissues was increased in group HO (P ＜0.05).Liver injury induced by intestinal I/R was significantly attenuated in group HO compared with group I/R (P ＜ 0.05).Conciusioon HO-1 protein mediated by cell penetrating peptide PEP-1 can attenuate liver injury induced by intestinalI/R in rats.