Samples collection
After that animals were kept fasting for 12 h, the animals were
anesthesized and the blood was withdrawn from theretro-orbital
venous plexus using heparinized capillary tubes. Blood samples
were collected, left to clot, and then centrifuged at 3000 r.p.m for 15
min to separate the serum. Freshly prepared serum was used for
determination of blood glucose according to Trinder(1969) and the
rest of serum was divided into aliquots and stored at - 20°C for
biochemical assays. Liver tissues were removed quickly and placed
in iced normal saline, the tissues were cut into small pieces and
homogenized in cold buffer (0.5 g of Na2HPO4 and 0.7 g of
NaH2PO4/ 500 ml deionized water per g tissue), then centrifuged,
the supernatant was used for oxidant/ antioxidant parameters
estimation (Manna et al., 2005).