Institute of Cardiovascular Disease,Key Laboratory for Atherosclerology of Hunan Province,Life Science Research Center,University of South China
This work was supported by grants from The National Natural Sciences Foundation of China (81070220, 81170278)
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.
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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