J. Lipid Res. Neurobiology of Lipids (ISSN1683-5506)
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Originally published In Press as doi:10.1194/jlr.M700497-JLR200 on January 7, 2008 Originally published In Press as doi:10.1194/jlr.M700497-JLR200 on December 27, 2007

Papers In Press, published online ahead of print April 1, 2008
J. Lipid Res., doi:10.1194/jlr.M700497-JLR200
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Journal of Lipid Research, Vol. 49, 790-796, April 2008
Copyright © 2008 by American Society for Biochemistry and Molecular Biology

Effects of emulsified policosanols with different chain lengths on cholesterol metabolism in heterozygous LDL receptor-deficient miceboxs

Stefan P. J. Dullens*, Ronald P. Mensink*, Marjolijn C. E. Bragt*, Arie K. Kies{dagger} and Jogchum Plat1,*

* Department of Human Biology, Nutrition and Toxicology, Maastricht Research Institute, Maastricht University, Maastricht, The Netherlands
{dagger} DSM Food Specialties, Research and Development, Biochemistry and Nutrition Department, Delft, The Netherlands

boxs The online version of this article (available at http://www.jlr.org) contains supplementary data in the form of one figure.

Published, JLR Papers in Press, January 7, 2008.

1 To whom correspondence should be addressed. e-mail: j.plat{at}hb.unimaas.nl

Policosanol is a mixture of long-chain primary aliphatic saturated alcohols. Previous studies in humans and animals have shown that these compounds improved lipoprotein profiles. However, more-recent placebo-controlled studies could not confirm these promising effects. Octacosanol (C28), the main component of sugarcane-derived policosanol, is assumed to be the bioactive component. This has, however, never been tested in an in vivo study that compared individual policosanol components side by side. Here we present that neither the individual policosanol components (C24, C26, C28, or C30) nor the natural policosanol mixture (all 30 mg/100 g diet) lowered serum cholesterol concentrations in LDL receptor knock-out (LDLr+/–) mice. Moreover, there was no effect on gene expression profiles of LDLr, ABCA1, HMG-CoA synthase 1, and apolipoprotein A-I (apoA-I) in hepatic and small intestinal tissue of female LDLr+/– mice after the 7 week intervention period. Finally, none of the individual policosanols or their respective long-chain fatty acids or aldehydes affected de novo apoA-I protein production in vitro in HepG2 and CaCo-2 cells. Therefore, we conclude that the evaluated individual policosanols, as well as the natural policosanol mixture, have no potential for reducing coronary heart disease risk through effects on serum lipoprotein concentrations.

Supplementary key words high density lipoproteins • low density lipoproteins • CHD • nutrition






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