Research: Probucol Inhibits Atherosclerosis by Regulating ABCA1, SR-BⅠ, ABCG5 and ABCG8 Expression and Anti-inflammatory Effects in Hypercholesterolemic Rabbits
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Institute of Cardiovascular Disease,Key Laboratory for Atherosclerology of Hunan Province,Life Science Research Center,University of South China

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This work was supported by grants from The National Natural Sciences Foundation of China (81070220, 81170278)

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    Abstract:

    Probucol is a potent hypolipidemic drug that decreases plasma high-density lipoprotein cholesterol (HDL-C) levels but attenuates atherosclerosis. However, the detailed mechanisms are not fully understood. The aim of this study was to explore the molecular mechanisms of the HDL-C-lowering and antiatherogenic effects of probucol. New Zealand white rabbits were randomly divided into normal diet group, normal diet+probucol group, high fat diet (HFD) group and HFD+probucol (HFD+P) group. After 7 weeks of treatments, the extent of the atherosclerotic lesions, hepatic lipid accumulation and plasma levels of triglycerides, total cholesterol, low-density lipoprotein cholesterol and HDL-C were significantly reduced in HFD+P group as compared to HFD group. Probucol effectively inhibited down-regulation of hepatic scavenger receptor class B typeⅠ (SR-BⅠ) expression, and ATP-binding cassette (ABC) transporters G5 (ABCG5) and G8 (ABCG8) expression in the liver and small intestine induced by HFD but further promoted HFD-induced reduction in hepatic ABC transporter A1 (ABCA1) expression. In addition, probucol also significantly prevented HFD-induced increases of tumor necrosis factor-α, interleukin-1, interleukin-6 and monocyte chemotactic protein-1 levels in the aortic arch and plasma. Thus, our data provide strong evidence that probucol alleviates atherosclerosis through regulating ABCA1, SR-BⅠ, ABCG5 and ABCG8 expression and inhibiting the secretion of proinflammatory cytokines in hypercholesterolemic rabbits.

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CUI Li-Bao, YU Xiao-Hua, JIANG Chong-Hui, TANG Ya-Ling, OUYANG Xin-Ping, HE Ping-Ping, LV Yun-Cheng, YAO Feng, ZHANG Min, TANG Chao-Ke.Research: Probucol Inhibits Atherosclerosis by Regulating ABCA1, SR-BⅠ, ABCG5 and ABCG8 Expression and Anti-inflammatory Effects in Hypercholesterolemic Rabbits[J]. Progress in Biochemistry and Biophysics,2015,42(9):866-876

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History
  • Received:April 24,2015
  • Revised:August 05,2015
  • Adopted:August 17,2015
  • Online: September 22,2015
  • Published: September 20,2015
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