CAT (EC 126.96.36.199; CAT) activity was evaluated by observing the rate of decrease in hydrogen peroxide (H2O2) absorbance in a spectrophotometer at 240 nm. SOD (EC 188.8.131.52, SOD) activity was assessed by quantifying the inhibition of superoxide-dependent adrenaline auto-oxidation in a spectrophotometer at 480 nm (Aebi, 1984 and Misra and Fridovich, 1972). CAT activity is expressed as units CAT/mg protein and SOD activity as Units SOD/mg protein. To better understand the effect of vitamin A supplementation upon these free radical-detoxifying enzymes we applied a ratio between SOD and CAT activities (SOD/CAT), two enzymes that work in sequence to reduce the superoxide
anion to water. ABT-199 cell line Glutathione S-transferase (GST, E.C. 184.108.40.206) activity was determined spectrophotometrically at 340 nm by measuring the formation of the conjugate of Dorsomorphin nmr GSH (glutathione) with CDNB (chloro-dinitro benzene) as previously described
by Habig and Jakoby (1981). Enzyme activity was determined by mixing buffer GSH 20 mM with the sample. The reaction started by CDNB 20 mM addition was carried out at 30 °C, and monitored spectrophotometrically for 3 min. Corrections of the spontaneous reaction were made by measuring and subtracting the rate in the absence of enzyme. Results are expressed as nmol of CDNB conjugated with glutathione/min/mg protein. Body weights, body weight gains, gestation length, numbers of implants and pups delivered, delivery index and viability indices of pups were analyzed by the one-way analysis of variance (ANOVA) to determine if any statistical differences existed among the groups. If the ANOVA presented a significant result, Dunnett’s test was
performed to detect any significant differences between the treated groups and their corresponding controls. The litter was used as a unit for statistical Phosphatidylinositol diacylglycerol-lyase evaluation for the data of body weights and viability index of pups. The sex ratios of pups were analyzed by Chi2 test. Differences in OFT scores and biochemical parameters in hippocampi and striatum between control and retinyl palmitate treated dams were determined with one-way ANOVA. For post-hoc comparisons, the Duncan’s test was conducted. The number of correct and incorrect performances in the homing test was compared among groups using a Chi2 test. A two-way (ANOVA), with drug exposure and sex difference as factors, was used to analyze differences in the time spent over the homing area, differences in OFT scores and biochemical parameters in offspring hippocampus and striatum. For post-hoc comparisons, the Bonferroni test was conducted when exposure factor was significantly and one-way ANOVA with Tukey’s post hoc comparisons when sex difference was significantly different among groups. For the time spent over the homing area, OFT scores and biochemical analysis the litter was used as a unit for statistical evaluation with distinction between males and females. Both behavioral and biochemical results are expressed as means ± standard error of the mean (S.