ALT levels after reperfusion. After 60 minutes of ischemia and 2 hours of reperfusion, serum levels of ALT were determined. Compared with sham-operated control mice, I/R mice showed significant increases in ALT. The post-treatment of IPO significantly reduced all serum levels of ALT compared to I/R group. "+L" means "+L-NAME". For all groups, n = 8. * p < 0.05 compared to sham group. † p < 0.05 compared to IPO+I/R group.