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Cranberry flavonoids, atherosclerosis and cardiovascular health
1Department of Animal Sciences, University of Wisconsin-Madison, 53706, USA.
Insights
Flavonoids, found in foods like cranberries, may reduce atherosclerosis risk by acting as antioxidants and improving cholesterol levels. Further research highlights cranberry
Area of Science:
- Cardiovascular Science
- Nutritional Science
- Biochemistry
Background:
- Atherosclerosis, characterized by arterial plaque buildup, is a leading cause of death via heart attack and stroke.
- The process, atherogenesis, involves oxidized low-density lipoprotein (LDL) uptake by macrophages, foam cell accumulation, and fatty streak formation.
- Dietary flavonoids are increasingly recognized for their potential to mitigate atherosclerosis.
Purpose of the Study:
- To review existing literature on the effects of flavonoids on atherosclerosis.
- To emphasize the specific roles of flavonols and proanthocyanidins found in cranberries.
- To explore the potential of cranberry-derived flavonoids in preventing cardiovascular disease.
Main Methods:
- Literature review of in vitro and in vivo studies on flavonoid effects.
- Analysis of studies investigating antioxidant and anti-inflammatory properties of flavonoids.
- Examination of research on flavonoid impact on lipid metabolism and cholesterol transport.
Main Results:
- Flavonoids exhibit antioxidant properties, inhibiting LDL oxidation and platelet aggregation.
- They influence enzymes involved in lipid metabolism, potentially modulating immune response to oxidized LDL.
- Evidence suggests flavonoids may promote vasorelaxation, enhance reverse cholesterol transport, and lower total and LDL cholesterol.
Conclusions:
- Flavonoids, particularly those in cranberries like flavonols and proanthocyanidins, show promise in combating atherosclerosis.
- Their multifaceted actions include antioxidant, anti-inflammatory, and lipid-modulating effects.
- Further investigation into cranberry flavonoids could lead to novel dietary strategies for cardiovascular disease prevention.
Abstract:
Atherosclerosis is the deposition of plaques containing cholesterol and lipids in arterial walls. Atherosclerosis causes cardiovascular disease that lead to heart attacks and stroke. Mortality from these diseases is the leading cause of death in the U.S. Atherogenisis starts with the uptake of oxidized LDL by endothelial macrophages, the accumulation of foam cells in the intima of the artery and the formation of fatty streaks. Research indicates that consumption of flavonoids in foods and beverages may decrease the risk of atherosclerosis. In vitro and in vivo experiments with flavonoids demonstrate that flavonoids are dietary antioxidants and inhibit LDL oxidation, inhibit platelet aggregation and adhesion, inhibit enzymes involved in lipid and lipoprotein metabolism that affect the immune response to oxidized LDL and their uptake by endothelial macrophages, may induce endothelium-dependent vassorelaxation, and may increase reverse cholesterol transport and decrease total and LDL cholesterol. Cranberries contain both hydroxycinnamic acids and flavonoids. The cranberry flavonoids belong to three groups: anthocyanins, flavonols, and proanthocyanidins. This article reviews the literature on the effects of flavonoids on atherosclerosis with an emphasis on the potential effects of the flavonols and proanthocyanidins in cranberries.