Xenobiotic metabolism
The effects of a fruit juice (10 ml of 100% pure juice) on streptozotocininduced
diabetes on tissue-specific cytochrome P450 (CYP) and glutathione-dependent
xenobiotic metabolism was investigated in rats. Results
demonstrated that rats with streptozotocin-induced diabetes exhibited an
increase (35–50%) in cytochrome P4504A-dependent lauric acid hydroxylation
in liver, kidney and brain. About a twofold increase in cytochrome
P4502E-dependent hepatic aniline hydroxylation and a 90–100% increase
in cytochrome P4501A-dependent ethoxycoumarin-O-deethylase activities
in kidney and brain was also observed. A significant increase (80%,
p < 0.01) in aminopyrene N-demethylase activity was observed only in the
kidney of rats with streptozotocin-induced diabetes, and a decrease was
observed in the liver and brain of rats with streptozotocin-induced diabetes.
A significant increase (77%) in NADPH-dependent lipid peroxidation
(plasma lipid peroxidase) in kidney of diabetic rats was also observed.
A marked decrease (65%) in hepatic glutathione content and glutathione
S-transferase activity and an increase (about twofold) in brain glutathione