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Oxidative stress markers in aged mice. (A) MDA level, (B) GSH-Px activity, (C) GSH level, and (D) CAT activity were determined in the cortical tissue of each mice (n = 8). *P < 0.05, **P < 0.01, ***P < 0.001 compared to Cont group; #P < 0.05 compared to Pb group.
