Redox modulating effects of grape juice during aging

Area of Science:

• * Nutritional Science
• * Gerontology
• * Biochemistry

Background:

• * Polyphenols, abundant in grape juice, possess known antioxidant properties beneficial for health.
• * Grape juice supplementation may mitigate age-associated diseases and risk factors.
• * This study investigates grape juice's impact on erythrocyte and plasma health in young and old rats.

Purpose of the Study:

• * To evaluate the antioxidant effects of grape juice in young and old Wistar rats.
• * To assess grape juice's influence on key oxidative stress biomarkers.
• * To explore grape juice's potential as an anti-aging agent.

Main Methods:

• * Oral administration of grape juice (10 μL/g body weight) to young (4 months) and old (24 months) male Wistar rats for 28 days.
• * Measurement of antioxidant defense biomarkers: ferric reducing ability of plasma (FRAP), reactive oxygen species (ROS), plasma membrane redox system (PMRS), glutathione (GSH), osmotic fragility, and malondialdehyde (MDA).
• * Comparison of treated groups with age-matched control groups.

Main Results:

• * Significant increases in FRAP, PMRS, and GSH levels in grape juice-treated rats compared to controls (p<0.05).
• * Significant decreases in ROS and MDA levels, indicating reduced lipid peroxidation and oxidative stress (p<0.05).
• * Elevated FRAP and PMRS, coupled with reduced ROS, demonstrate grape juice's efficacy against oxidative stress.

Conclusions:

• * Grape juice acts as a potent antioxidant due to its high bioavailability and ability to combat oxidative stress.
• * The findings support grape juice's role in enhancing antioxidant defense mechanisms.
• * Grape juice shows promise as a potential anti-aging agent.