RT-PCR analysis of GPX (a) and GST (b) in liver tissues of control non diabetic, experimentally diabetic and curcumin ( Cur) treated diabetic rats. RT-PCR was performed with Qiagen one-step. The densitometric analysis of the expresses bands (lower columns) was normalized with that of β-actin and then calculated as relative to the control group. Values are expressed as mean ± SEM for 8 rats. *Values are significant different (p < 0.5) compared to control non diabetic group. #Values are significant different (p < 0.5) compared to control diabetic group.