Plasma CAT (A), SOD (B) and GSH (C) concentrations. Data are presented as the mean ± S.D. (n=6). #P< 0.01 compared with Sham; *P< 0.01 compared with vehicle; **P< 0.05 compared with vehicle; &P< 0.01 compared with CR-SPRC; &&P< 0.05 compared with CR-SPRC. All experiments repeated at least three times.