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ORIGINAL RESEARCH

NO Donor Ameliorates Ischemia–Reperfusion Injury of the Rat Liver With iNOS Attenuation

, MD, , MD, , MD, , MD, , MD, , MD & , MD show all
Pages 193-200 | Received 13 Dec 2004, Accepted 01 Feb 2005, Published online: 09 Jul 2009
 

Abstract

This study investigated the effect of a spontaneous nitric oxide (NO) donor, FK409 (FK), in a rat model of segmental hepatic ischemia. Rats were allocated to four experimental groups. Two of the groups underwent segmental hepatic ischemia of 60 min duration and received FK (0.4 mg/kg, iv) or vehicle alone before inducing ischemia and again 5 min before reperfusion. Sham-FK and sham groups were treated identically, but did not have vascular occlusion. Serum aspartate transaminase (AST), alanine transaminase (ALT), and lactate dehydrogenase (LDH) were measured, and the livers were examined for histological evidence of injury, polymorphonuclear neutrophil (PMN) infiltration, and immunohistochemical expression of inducible NO synthase (iNOS) before and 6 h after reperfusion. AST, ALT, and LDH levels were significantly (p <. 05) reduced 6 h after reperfusion in the FK-treated group compared with the vehicle-treated control group. FK treatment also reduced the degree of hepatic damage apparent on histopathology and reduced PMN infiltration and iNOS expression. Thus, FK treatment is protective against hepatic ischemia reperfusion injury and attenuates neutrophil infiltration and iNOS expression.

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