[ D -Ala
, D -Leu
]-Enkephalinamide (DADLE)-induced increase in superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities of the cortex exposed to ischemia/reperfusion (I/R) stress. Mean ± standard deviation (n = 6). * P < 0.05 versus the control group. #P < 0.05 versus I/R group. Note that I/R induced a significant reduction of SOD and GSH-Px activities, which were increased by δ-opioid receptor (DOR) activation with DADLE treatment.