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Fructus corni enhances endothelial cell antioxidant defenses
1Department of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA, USA.
General Pharmacology
|August 4, 1998
Summary
Fructus corni extract (FCE) reduces oxidative stress in cells by lowering harmful molecules and boosting antioxidant defenses. This suggests FCE may help prevent or treat conditions linked to cellular damage.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Oxidative stress, characterized by an imbalance between reactive oxygen species and antioxidant defenses, contributes to cellular damage.
- Hydrogen peroxide (H2O2) and superoxide anion (O2-) are key reactive oxygen species implicated in oxidative stress.
Purpose of the Study:
- To investigate the antioxidant effects of Fructus corni extract (FCE) in bovine pulmonary artery endothelial cells (PAECs).
- To determine FCE's impact on reactive oxygen species levels, the glutathione (GSH) redox cycle, and antioxidant enzyme activities.
Main Methods:
- PAECs were treated with varying concentrations of FCE.
- Oxidative stress was induced using hypoxanthine/xanthine oxidase (for H2O2) or H2O2 (for O2-).
- Levels of H2O2, O2-, GSH, and GSH disulfide, along with enzyme activities (GSH peroxidase, GSH disulfide reductase, superoxide dismutase, catalase), were measured.
Main Results:
- FCE demonstrated a concentration-dependent reduction in H2O2 and O2- levels.
- FCE enhanced the GSH redox cycle by increasing intracellular GSH, GSH peroxidase, and GSH disulfide reductase activities, while decreasing GSH disulfide.
- FCE treatment led to increased activities of superoxide dismutase and catalase.
Conclusions:
- FCE effectively suppresses reactive oxygen species and modulates the glutathione redox cycle.
- FCE enhances the activity of key antioxidant enzymes, promoting a protective antioxidant state.
- These findings suggest FCE's potential utility in preventing or treating oxidative stress-related disorders.