The effect of DG on Troponin I protein expression in H9c2 cells. After H9c2 cells were challenged with H/R in the presence or absence of DG (125 and 250 μg/ml) or trolox (20 μM), the expression of Troponin I was analyzed by Western blot and was normalized by β-actin. The figure is a representative of three individual experiments. The data were expressed as mean ± S.E.M. *p < 0.05 and **p < 0.01 indicated the groups with significant difference when compared to the control group; ### p < 0.001 when compared to the normoxic group.