Policosanol has no antioxidant activity in human low-density lipoprotein but increases excretion of bile acids in hamsters
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摘要Policosanol is a group of long chain primary alcohols and has been shown to reduce blood cholesterol levels and to inhibit the oxidation of low-density lipoprotein (LDL). The present study examined (i) the effect of policosanol supplementation in the diet on the fecal excretion of neutral and acidic sterols in hamsters and (ii) the antioxidant activity of policosanol in human LDL. Golden Syrian hamsters were divided into four groups (n = 12/each) fed one of the four diets containing 0 (control), 0.38, 0.75, and 1.50 g kg(-1) policosanol for 6 weeks. It was found that hamsters given 0.38-1.5 g kg-1 diets had a serum total cholesterol level lowered by 15-25% and had a high-density lipoprotein cholesterol elevated by 7-16.8%. It was found that policosanol increased the excretion of acidic sterols by 25-73%. Contrary to that in previous reports, policosanol had no apparent anti-LDL oxidation activity when 1-tetracosanol, 1-hexacosanol, and 1-octacosanol were incubated in human LDL. Policosanol also possessed no scavenging activity on the free radical2,2-diphenyl-1-picrylhydrazyl. These data provide evidence that in addition to the effect of HMG-CoA reductase, the cholesterol-lowering activity of policosanol is partially mediated by its inhibition on the absorption of bile acids, but these data disprove the claim that policosanol is an antioxidant.
著者Ng CH, Leung KY, Huang Y, Chen ZY
期刊名稱Journal of Agricultural and Food Chemistry
出版年份2005
月份8
日期10
卷號53
期次16
出版社AMER CHEMICAL SOC
頁次6289 - 6293
國際標準期刊號0021-8561
電子國際標準期刊號1520-5118
語言英式英語
關鍵詞cholesterol; HDL; LDL; octacosanol; policosanol; primary alcohol; triacontanol; triglyceride
Web of Science 學科類別Agriculture; Agriculture, Multidisciplinary; AGRICULTURE, MULTIDISCIPLINARY; Chemistry; Chemistry, Applied; CHEMISTRY, APPLIED; Food Science & Technology; FOOD SCIENCE & TECHNOLOGY

上次更新時間 2021-10-05 於 02:34