The levels of total reduced GSH and activities of SOD (as indices of non-enzymatic and enzymatic antioxidant status, respectively) were measured in the serum and homogenates of the liver and kidney tissues. On the other hand, the concentrations of TBARS, indices of lipid peroxidation and oxidative stress, were also determined in these sera, liver and renal biological samples. During these three assays, specific commercial kits (Cayman Chemical; Ann Arbor, MI, USA) were used, and all samples were processed in duplicate and according the manufacturer's instructions.