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Vascular protection by dietary polyphenols
Jean-Claude Stoclet1, Thierry Chataigneau, Mamadou Ndiaye
1Pharmacologie et Physico-Chimie des Interactions Cellulaires et Moléculaires, UMR CNRS 7034, Faculté de Pharmacie, Université Louis Pasteur de Strasbourg, B. P. 60024, 74 route du Rhin, F 67401 Illkirch, France. stoclet@aspirine.u-strasbg.fr
European Journal of Pharmacology
|October 7, 2004
Summary
Polyphenols from plant-based foods like fruits and vegetables offer cardiovascular protection by improving blood vessel function and inhibiting harmful cell growth. These compounds enhance nitric oxide production and reduce pro-angiogenic factors, contributing to heart health.
Area of Science:
- Cardiovascular Pharmacology
- Nutritional Biochemistry
- Molecular Cardiology
Background:
- Dietary polyphenols, abundant in fruits, vegetables, cocoa, red wine, and tea, are linked to cardiovascular protection.
- Epidemiological studies show an inverse relationship between polyphenol intake and cardiovascular risk.
- Mechanisms beyond antioxidant effects are crucial for understanding their cardioprotective roles.
Purpose of the Study:
- To elucidate the mechanisms by which plant polyphenols confer cardiovascular protection.
- To investigate the effects of polyphenols on endothelial function and vascular cell behavior.
- To identify specific molecular pathways modulated by polyphenols in vascular cells.
Main Methods:
- Analysis of polyphenol effects on endothelial cells, focusing on vasodilating factor production and vasoconstrictor synthesis.
- Investigation of polyphenol impact on smooth muscle cells, particularly regarding pro-angiogenic factor expression.
- Examination of intracellular signaling pathways, including the PI3-kinase/Akt and p38 MAPK pathways, and their redox-sensitive activation.
Main Results:
- Polyphenols enhance nitric oxide (NO), endothelium-derived hyperpolarizing factor (EDHF), and prostacyclin production while inhibiting endothelin-1 in endothelial cells.
- Polyphenols reduce vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP-2) expression in smooth muscle cells.
- Specific signaling pathways (PI3-kinase/Akt, p38 MAPK) are modulated by polyphenols, influencing vascular cell function.
Conclusions:
- Plant polyphenols exert vasoprotective, anti-angiogenic, anti-atherogenic, vasorelaxant, and anti-hypertensive effects through multiple mechanisms.
- These effects are mediated by modulating key signaling pathways in both endothelial and smooth muscle cells.
- Specific polyphenol structures are critical for triggering these beneficial vascular actions.