期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：2014
卷号：60
期号：6
页码：450-454
DOI：10.3177/jnsv.60.450
出版社：Center for Academic Publications Japan
摘要：Obesity is increasingly becoming associated with increased risk of atherosclerosis. Serum levels of the bile acid deoxycholic acid (DCA) are elevated in mice with obesity induced by a high-fat (HF) diet. Therefore, we investigated the influence of DCA on the functions of vascular smooth muscle cells (VSMCs) because the initiation and progression of atherosclerosis are associated with VSMC proliferation and migration. DCA induced c-jun N-terminal kinase (JNK) activation whereas a JNK inhibitor prevented DCA-induced VSMC proliferation and migration. Based on these findings, we examined whether DCA promotes the expression of platelet-derived growth factor β-receptor (PDGFRβ) that has a c-Jun binding site in its promoter region. The mRNA and protein expression levels of PDGFRβ were upregulated in VSMCs after a 24- and 48-h incubation with DCA, respectively. The effects of PDGF such as proliferation and migration of VSMCs were promoted after a 48-h incubation with DCA despite the absence of DCA during PDGF stimulation. These findings suggest that elevated serum concentrations of DCA are involved in the pathogenesis of atherosclerosis in HF-induced obesity.
