SOD1 and ischemia: In the 20 mg/kg ASA-DA-sham-group, SOD1 and 2 immunoreactivities in the stratum pyramidale were similar to those in the vehicle-sham-group, and their immunoreactivities at 2 and 5 days post-ischemia were not changed compared with those in the 20 mg/kg ASA-DA-sham-group.