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Resveratrol Requires Red Wine Polyphenols for Optimum Antioxidant Activity.

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Resveratrol and red wine polyphenols (RWP) show antioxidant effects against oxidative stress. Their combination offers synergistic protection, with RWP enhancing resveratrol's activity.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Nutritional Science

Background:

  • Dietary intake of fruits and vegetables is linked to reduced risk of aging and oxidative stress-related diseases.
  • Antioxidant microcomponents in fruits and red wine are suggested to contribute to their health benefits.
  • Resveratrol (RSV) and red wine polyphenols (RWP) are key dietary antioxidants.

Purpose of the Study:

  • To investigate the antioxidant activities of pure resveratrol (RSV) and red wine polyphenols (RWP).
  • To evaluate their effects on UV-B radiated isolated rat hepatocytes, a model for oxidative stress.
  • To determine the combined effect of RSV and RWP on cellular oxidative damage.

Main Methods:

  • Isolated rat hepatocytes were subjected to UV-B radiation.
  • Cells were treated with varying concentrations of resveratrol and/or red wine polyphenols.
  • Assays measured thiobarbituric acid reactive substances (TBARS) and lipid-soluble antioxidants.

Main Results:

  • Resveratrol exhibited dose-dependent pro-oxidant or antioxidant effects.
  • Red wine polyphenols demonstrated dose-dependent protection against photolipoperoxidation.
  • The combination of RSV and RWP showed a synergistic antioxidant effect, enhancing RSV efficacy.

Conclusions:

  • Resveratrol requires red wine polyphenols for optimal antioxidant activity.
  • Synergistic interaction between RSV and RWP is crucial for combating oxidative stress.
  • Dietary polyphenols play a vital role in mitigating oxidative damage and aging processes.