Eicosapentaenoic Acid-Enriched Phosphatidylcholine Attenuated Hepatic Steatosis Through Regulation of Cholesterol Metabolism in Rats with Nonalcoholic Fatty Liver Disease

详细信息    查看全文

• 作者：Yanjun Liu ; Di Shi ; Yingying Tian ; Yuntao Liu ; Qiping Zhan ; Jie Xu ; Jingfeng Wang…
• 关键词：Eicosapentaenoic acid ; enriched phosphatidylcholine ; Hepatic steatosis ; Nonalcoholic fatty liver disease ; Cholesterol metabolism
• 刊名：Lipids
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：52
• 期：2
• 页码：119-127
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Lipidology; Neurochemistry; Medical Biochemistry; Nutrition; Medicinal Chemistry; Microbial Genetics and Genomics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1558-9307
• 卷排序：52

文摘

Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in the world. Disturbed cholesterol metabolism plays a crucial role in the development of NAFLD. The present study was conducted to evaluate the effects of EPA-PC extracted from sea cucumber on liver steatosis and cholesterol metabolism in NAFLD. Male Wistar rats were randomly divided into seven groups (normal control group, model group, lovastatin group, low- and high-dose EPA groups, and low- and high-dose EPA-PC groups). Model rats were established by administering a diet containing 1% orotic acid. To determine the possible cholesterol metabolism promoting mechanism of EPA-PC, we analyzed the transcription of key genes and transcriptional factors involved in hepatic cholesterol metabolism. EPA-PC dramatically alleviated hepatic lipid accumulation, reduced the serum TC concentration, and elevated HDLC levels in NAFLD rats. Fecal neutral cholesterol excretion was also promoted by EPA-PC administration. Additionally, EPA-PC decreased the mRNA expression of hydroxymethyl glutaric acid acyl (HMGR) and cholesterol 7α-hydroxylase (CYP7A), and increased the transcription of sterol carrying protein 2 (SCP2). Moreover, EPA-PC stimulated the transcription of peroxisome proliferators-activated receptor α (PPARα) and adenosine monophosphate activated protein kinase (AMPK) as well as its modulators, liver kinase B1 (LKB1) and Ca2+/calmodulin-dependent kinase kinase (CAMKK). Based on the results, the promoting effects of EPA-PC on NAFLD may be partly associated with the suppression of cholesterol synthesis via HMGR inhibition and the enhancement of fecal cholesterol excretion through increased SCP2 transcription. The underlying mechanism may involve stimulation of PPARα and AMPK.