Resveratrol Activates Erythrocyte Plasma Membrane Redox System

Strategic Insights -

Researchers at the University of Allahabad, India, have discovered that resveratrol, a polyphenol found in plants, activates the erythrocyte plasma membrane redox system (PMRS) in human erythrocytes. This activation enables the cells to effectively counteract oxidative processes by donating electrons to extracellular electron acceptors. The study, published in Pharmacological Reports, reveals that resveratrol's electron-donating ability is concentration-dependent and is slightly less than that of quercetin.

Key Takeaways:

  • Resveratrol activates the erythrocyte plasma membrane redox system (PMRS) in human erythrocytes, enabling the cells to effectively counteract oxidative processes.
  • The activation of PMRS and AFR reductase by resveratrol is concentration-dependent, with a 41% increase in PMRS activity and a 30% increase in AFR reductase activity.
  • Resveratrol's electron-donating ability is slightly less than that of quercetin, but still significant in activating the erythrocyte PMRS and AFR reductase.
  • The study suggests that resveratrol may play a role in activating the erythrocyte PMRS and AFR reductase in disease conditions where there is a decrease in plasma antioxidant potential.
  • The research team, led by S.I. Rizvi, University of Allahabad, Department of Biochemistry, conducted the study to investigate the antioxidant properties of resveratrol.
  • The study has implications for understanding the role of resveratrol in antioxidant defense mechanisms and its potential applications in disease prevention and treatment.

Statistics:

  • 41% increase in erythrocyte PMRS activity after incubating human erythrocytes with 10 μM resveratrol.
  • 30% increase in AFR reductase activity after incubating human erythrocytes with 10 μM resveratrol.
  • Concentration-dependent activation of PMRS and AFR reductase by resveratrol.
  • Electron-donating ability of resveratrol: 10 μM resveratrol = 0.85 ± 0.14 pmol/min/mg protein (quercetin = 1.11 ± 0.15 pmol/min/mg protein).

Sources:

  • Rizvi, S. I., et al. "Activation of the erythrocyte plasma membrane redox system by resveratrol: a possible mechanism for antioxidant properties." Pharmacological Reports 62.4 (2010): 726-732.
  • Erythroid Cells. Science Letter.