Author(s): Kim M, Kim Y
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Abstract There is an increasing interest in curcumin (Curcuma longa L.) as a cardiovascular disease (CVD) protective agent via decreased blood total cholesterol and low-density lipoprotein-cholesterol (LDL-cholesterol) level. The aim of this study was to investigate further the potential mechanism in the hypocholesterolemic effect of curcumin by measuring cholesterol 7a-hydroxylase (CYP7A1), a rate limiting enzyme in the biosynthesis of bile acid from cholesterol, at the mRNA level. Male Sprague-Dawley rats were fed a 45\% high fat diet or same diet supplemented with curcumin (0.1\% wt/wt) for 8 weeks. The curcumin diet significantly decreased serum triglyceride (TG) by 27\%, total cholesterol (TC) by 33.8\%, and LDL-cholesterol by 56\%, respectively as compared to control group. The curcumin-supplemented diet also significantly lowered the atherogenic index (AI) by 48\% as compared to control group. Hepatic TG level was significantly reduced by 41\% in rats fed with curcumin-supplemented diet in comparison with control group (P < 0.05). Conversely, the curcumin diet significantly increased fecal TG and TC. The curcumin diet up-regulated hepatic CYP7A1 mRNA level by 2.16-fold, compared to control group p (P < 0.05). These findings suggested that the increases in the CYP7A1 gene expression may partially account for the hypocholesterolemic effect of curcumin.
This article was published in Nutr Res Pract
and referenced in Pharmaceutica Analytica Acta