תזונה ותוספים Dietary Cholesterol Affects Plasma Lipid Levels, the Intravascular Processing of Lipo

[Mike Bikov]

Dietary Cholesterol Affects Plasma Lipid Levels, the Intravascular Processing of Lipoproteins and Reverse Cholesterol Transport without Increasing the Risk for Heart Disease
Jacqueline Barona 1,2 and Maria Luz Fernandez 1​

1	Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA; Email: [email protected]
2	School of Microbiology, University of Antioquia, Medellin, A.A. 1226, Colombia
*	Author to whom correspondence should be addressed; Email: [email protected]; Tel.: +1-860-486-5547; Fax: +1-860-486-3674.

Received: 9 June 2012; in revised form: 30 July 2012 / Accepted: 3 August 2012 / Published: 17 August 2012
Abstract:
The associations between dietary cholesterol and heart disease are highly controversial. While epidemiological studies and clinical interventions have shown the lack of correlation between cholesterol intake and cardiovascular disease (CVD) risk, there is still concern among health practitioners and the general population regarding dietary cholesterol. In this review, several clinical studies utilizing cholesterol challenges are analyzed in terms of changes that occur in lipoprotein metabolism resulting from excess consumption of cholesterol. Dietary cholesterol has been shown to increase both LDL and HDL in those individuals who respond to a cholesterol challenge without altering the LDL cholesterol/HDL cholesterol ratio, a key marker of CVD risk. Further, dietary cholesterol has been shown to increase only HDL with no changes in LDL with average cholesterol consumption and during weight loss interventions. Ingestion of cholesterol has also been shown to increase the size of both LDL and HDL particles with the associated implications of a less atherogenic LDL particle as well as more functional HDL in reverse cholesterol transport. Other changes observed in lipoprotein metabolism are a greater number of large LDL and decreases in small LDL subfractions. All this information put together points to specific roles of dietary cholesterol in substantially altering intravascular processing of lipoproteins as well as reverse cholesterol transport.​

http://www.mdpi.com/2072-6643/4/8/1015/htm