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AST IV alleviates oxidative stress in amyloid β25-35-treated PC12 cells. (A) SOD activity and (B) MDA content were measured from the supernatants of the control, model, 50, 100 and 200 µM AST IV groups. (C) FACS was performed to assess intercellular ROS levels in the control, model, 50, 100 and 200 µM AST IV groups. **P<0.01 vs. Control; #P<0.05, ##P<0.01 vs. Model. AST IV, astragaloside IV; MDA, malondialdehyde; SOD, superoxide dismutase.
