Prevention of GS on DOX-induced oxidative stress. Subconfluent H9C2 cells were left untreated or exposed to DOX and co-treated with GS for 24 h and oxidative stress was evaluated by measuring DCFH oxidation (A) and the amount of TBARS formation (malondialdehyde, MAD) (B). The results are expressed as mean±S.E. from 3 independent experiments. **P < 0.01 indicates a significant difference from DOX treatment. ##P < 0.01 indicates a significant difference from the control (GS 0 μM and DOX 0 μM).