Effects of YS on hepatocellular injury induced by hepatic ischemia and reperfusion. After 90 min of ischemia and 6 h of reperfusion, serum levels of ALT, AST (A) and LDH (B) were determined. YS at different doses (5, 10, 20 mg/kg) was injected intraperitoneally 24 h and 1 h before ischemia and a third dose was injected intravenously just before reperfusion. For all groups, n = 8. bP < 0.01 compared with sham group; dP < 0.01 compared with I/R group.