The lipid peroxidation was quantitatively measured by estimating the concentration
of thiobarbituric acid reactive substances (TBARS) in the liver. The quantity
of MDA formed was measured by the reaction with thiobarbituric acid (TBA) (Buege
and Aust, 1978). Liver samples were homogenized in ice and centrifuged to remove
cell debris. The supernatant were mixed with a TBA reagent consisting of 0.8% TBA
in 10% acetic acid (Merck, Germany). The reactionmixtureswere incubated in a boiling
water bath for 45 min, cooled and centrifuged for 5 min. Supernatants were collected
and the absorbance of the coloured layerwas measured by a spectrophotometer
at 532 nm. The results were expressed as MDA nmol/mg protein