Linked Life Data

18279878

Source:http://linkedlifedata.com/resource/pubmed/id/18279878

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pubmed-article:18279878pubmed:abstractTextProbucol is a unique hypolipidemic agent that increases cholesteryl ester transfer protein (CETP) activity. Enhanced CETP-mediated conversion of high-density lipoprotein (HDL) partly explains the probucol-induced decrease in HDL cholesterol and increase in plasma prebeta1-HDL (native lipid-poor HDL) concentrations. However, HDL cholesterol is reduced in patients that are completely deficient in CETP. Angiopoietin-like protein 3 (ANGPTL3) is an endogenous suppressor of endothelial lipase that promotes the hydrolysis of HDL phospholipids and may generate prebeta1-HDL. To determine whether probucol decreases ANGPTL3 and HDL phospholipids while increasing prebeta1-HDL, we measured these parameters before and after a 4-week probucol treatment in 39 hypercholesterolemic patients and age- and sex-matched controls. The median ANGPTL3 had decreased from 143 to 113 microg/L by week 4 (p<0.05). High-performance liquid chromatography revealed that probucol decreased the phospholipid content of very large (13.5-15 nm) and large (12.1 nm) HDL particles predominantly by 65% (p<0.01) and 53% (p<0.001), respectively. The change in ANGPTL3, but not CETP mass, was positively correlated with that in large HDL phospholipids (r=0.455, p<0.05). The absolute and relative concentrations of prebeta1-HDL increased by 14% (p<0.01) and 60% (p<0.001), respectively. The conversion rate of prebeta1-HDL into alpha-migrating HDL by lecithin-cholesterol acyltransferase did not change significantly. In conclusion, probucol decreases plasma ANGPTL3 and HDL phospholipids while increasing prebeta1-HDL. We speculate that probucol induces HDL remodeling via an endothelial lipase-mediated pathway.lld:pubmed
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pubmed-article:18279878pubmed:articleTitleProbucol markedly reduces HDL phospholipids and elevated prebeta1-HDL without delayed conversion into alpha-migrating HDL: putative role of angiopoietin-like protein 3 in probucol-induced HDL remodeling.lld:pubmed
pubmed-article:18279878pubmed:affiliationDepartment of Clinical Laboratory Medicine, Juntendo University School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo 113-8421, Japan.lld:pubmed
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pubmed-article:18279878pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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