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Abstract Title:

Modulation of hypercholesterolemia-induced alterations in apolipoprotein B and HMG-CoA reductase expression by selenium supplementation.

Abstract Source:

Chem Biol Interact. 2006 May 15;161(1):49-56. Epub 2006 Apr 3. PMID: 16581047

Abstract Author(s):

Sanjiv Dhingra, Mohinder P Bansal

Article Affiliation:

Department of Biophysics, Panjab University, Chandigarh-160014, India.

Abstract:

Various studies demonstrated a significant association between the trace element selenium (Se), hypercholesterolemia and the risk of cardiovascular disorders. Present study was aimed to reveal the role of Se supplementation in modulation of hypercholesterolemia-induced changes in apolipoprotein B (apoB) and 3-hydroxy 3-methylglutaryl co-enzyme A (HMG-CoA) reductase expression during experimental hypercholesterolemia in Sprague-Dawley male rats. Animals were fed 0.2 and 1 ppm Se-supplemented control diet as well as 2% cholesterol-supplemented diet for 3 months. Apolipoprotein B levels were measured by ELISA and Western blot. HMG-CoA reductase mRNA expression was studied by RT-PCR. ApoB levels increased significantly on 2% cholesterol-supplemented diet feeding. On 1 ppm Se supplementation apoB levels decreased significantly. HMG-CoA reductase mRNA expression decreased significantly on cholesterol-supplemented diet feeding and on 1 ppm Se supplementation the mRNA expression further decreased. So the present results demonstrate that 1 ppm Se supplementation is responsible for down regulation of apoB and HMG-CoA reductase expression during hypercholesterolemia. These findings highlight the therapeutic potential of selenium supplementation in lipid metabolism.

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Sayer Ji
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