Resveratrol Prevents Stress-Related Dysfunction of Mitochondria

This study was conducted to investigate the antistress potential of resveratrol, a natural polyphenol, in models that reproduce the conditions of acute hypobaric hypoxia and acute alcohol intoxication. Acute alcohol intoxication and acute hypobaric hypoxia induced an increase in the intensity of lipid peroxidation in the membranes of liver mitochondria from mice. Activation of lipid peroxidation was accompanied by swelling and variations in the levels of fatty acids with C₁₈ and C_20–22 in the composition of the total lipid fraction of mitochondrial membranes. The index of the unsaturation of fatty acids with C₁₈ was decreased by 7.5% (from 1.69 ± 0.01 to 1.52 ± 0.01). Furthermore, the (20:3ω6+20:5ω3)/22:6ω3 index decreased from 0.23 ± 0.02 to 0.13 ± 0.01 for fatty acids under acute hypobaric hypoxia conditions, suggesting a decrease in eicosanoid metabolism. The administration of 2 × 10^–5 mol/kg of resveratrol in animals for 5 days prevented changes in fatty acid composition, inhibiting activation of lipid peroxidation and swelling of mitochondria, thereby affecting physiological parameters. Thus, the adaptogenic properties of resveratrol may be ascribed to the prevention of lipid peroxidation in mitochondrial membranes, which probably affects the functional state of these organelles, contributing to the maintenance of cellular energy metabolism under stress conditions.

     

Antiviral and Antimicrobial Nucleoside Derivatives: Structural Features and Mechanisms of Action

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Sarcocystis neurona Transmission from Opossums to Marine Mammals in the Pacific Northwest

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