Effects of IPO on SOD (A) and MDA (B) levels in liver tissues. To assess the effect of IPO on oxidative stress after liver I/R, MDA and activity of SOD were measured. Hepatic 60 minutes ischemia and 2 hours of reperfusion caused substantial increase in liver MDA levels and marked decrease in liver SOD activity compared with IPO+I/R group. For all groups, n = 8. *Significant at p < 0.05 when compared with I/R group.