2.5. Antioxidant Capacity and Lipid Peroxidation
Liver was weighed and a 10% homogenate was prepared in a 50 mmol/L phosphate buffer
(pH 7.0) containing 0.1 mmol/L EDTA. The homogenate was centrifuged at 3500 rpm for 10 min
at 4 C for superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), reduced
glutathione (GSH), and thiobarbituric acid reactive substances (TBARS) tests.
2.5.1. Determination of SOD
SOD activity was measured basing on the method of Kono with slight modification.
Briefly, the reaction was initiated by mixing an aliquot of homogenate supernatant with 0.5 mM
hypoxanthine, 0.5 mM hydroxylamine and 0.01 U xanthine oxidase in the buffer, containing of
104 mM potassium phosphate, 78 mM sodium borate, and 0.025 mM EDTA (PH 7.0) at 37 C for
30 min in a reaction volume of 100 L. The reaction was terminated by adding 0.2 mL of 16% (v/v)
acetic acid solution containing 2.6 mM sulfanilic acid and 38.6 M naphthyl ethylenediamine and