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Food deprivation promotes oxidative imbalance in rat brain
R X Santos1, S Cardoso, S Silva
1Dept. of Zoology, Coimbra Univ. Hospital, Univ. of Coimbra, Portugal.
Journal of Food Science
|February 10, 2009
Summary
Food deprivation impacts brain oxidative status in rats, increasing oxidative stress markers. This dietary change may lead to brain cell degeneration and death.
Area of Science:
- Neuroscience
- Biochemistry
- Nutritional Science
Background:
- Oxidative stress plays a role in neurodegenerative diseases.
- Dietary interventions, such as food deprivation, can influence metabolic and cellular processes.
Purpose of the Study:
- To investigate the effects of 50% food deprivation on brain oxidative status in Wistar and Goto-Kakizaki (GK) rats.
- To compare oxidative stress markers and antioxidant defenses between Wistar and GK rats under normal and food-deprived conditions.
Main Methods:
- Evaluation of lipid peroxidation (TBARS), protein oxidation, hydrogen peroxide (H(2)O(2)) levels.
- Assessment of nonenzymatic (GSH, GSSG, vitamin E) and enzymatic (GPx, GRed, MnSOD) antioxidant defenses.
- Comparison between Wistar and GK rats subjected to normal diet versus 50% food deprivation for 2 months.
Main Results:
- GK rats showed lower vitamin E and higher GRed activity/GSH/GSSG ratio than Wistar rats.
- Food deprivation in Wistar rats decreased vitamin E, increased GPx activity, H(2)O(2) production, and TBARS formation.
- Food-deprived GK rats exhibited decreased vitamin E and GRed activity, and increased H(2)O(2) production compared to controls.
Conclusions:
- Food deprivation significantly alters brain oxidative status in both Wistar and GK rats.
- These alterations may increase susceptibility to brain cell degeneration and death.
- Dietary interventions warrant further investigation for their impact on brain health.
