Effects of AT and various agents on the I/R-induced increase in hepatic MPO activity 6 hours after reperfusion. Animals were subjected to 60 minutes of hepatic ischemia followed by reperfusion as described in Materials and Methods. Mean values of hepatic MPO activity after 6 hours of hepatic reperfusion are shown. Data represent the mean ± SD. †P < .01 versus I/R. ‡P < .01 versus AT-treated I/R. ¶P < .01 versus IM-treated I/R.