石榴皮多酚对胆固醇流出及相关蛋白表达的影响
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(1. 陕西师范大学食品工程与营养科学学院,陕西 西安 710119;2. 河南科技大学食品与生物工程学院,河南 洛阳 471023)

作者简介:

赵胜娟,女,河南科技大学讲师,博士。

通讯作者:

李建科(1960—),男,陕西师范大学教授,博士生导师,博士。E-mail: jiankel@snnu.edu.cn

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基金项目:

国家自然科学基金面上项目(编号:31871801);中央高校项目(编号:GK201706003)


Effects of pomegranate peel polyphenols on cholesterol efflux and related protein expression
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(1. College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xian, Shaanxi 710119, China; 2. College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, Henan 471023, China)

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    摘要:

    利用Raw264.7巨噬细胞源性泡沫细胞模型,阐明石榴皮多酚对高密度脂蛋白(High density lipoprotein,HDL)介导Raw264.7泡沫细胞胆固醇流出的调控作用,并采用蛋白质免疫印迹法(Western blotting,WB),分析石榴皮多酚对巨噬细胞胆固醇流出相关蛋白清道夫受体B1(Scavenger receptor B1,SR-B1)、酰基辅酶A1:胆固醇酰基转移酶(acyl-coenzyme A1: cholesterol acyltransferase,ACAT1)和胆固醇酯水解酶(cholesteryl ester hydrolase,nCEH)表达的影响,揭示细胞ACAT1和nCEH活性的变化。结果表明:石榴皮多酚可促进HDL介导的胆固醇流出,显著上调胆固醇流出相关蛋白SR-B1的表达(P<0.05);此外,石榴皮多酚对nCEH和ACAT1蛋白表达影响不显著(P>0.05),但可显著降低ACAT1的酶活(P<0.05),提高nCEH酶活性(P<0.05),从而有利于细胞内胆固醇酯向游离胆固醇的转化和流出。

    Abstract:

    In order to explore the effects of pomegranate peel polyphenols (PPPs) on SR-B1 protein expression and cholesterol efflux, in this study, Raw264.7 macrophages derived from foam cells were used as the model to illuminate the effects of PPPs on cholesterol efflux mediated by HDL. Western blot method was used to analyze the expression of scavenger receptor B1 (SR-B1), acyl-coenzyme A1: cholesterol acyltransferase (ACAT1) and cholesteryl ester hydrolase (nCEH). Further, the activity changes of ACAT1 and nCEH were revealed. The results showed that PPPs promoted the HDL-mediated cholesterol efflux and up-regulated the expression of SR-B1 significantly (P<0.05). In addition, the PPPs had no significant effects on nCEH and ACAT1 protein expression (P>0.05), but could significantly reduce the enzyme activity of ACAT1 and increase that of nCEH (P<0.05), which facilitated the transformation and outflow of intracellular cholesterol esters to free cholesterol.

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引用本文

赵胜娟,向进乐,陈树兴,等.石榴皮多酚对胆固醇流出及相关蛋白表达的影响[J].食品与机械,2019,(2):11-14.
ZHAOShengjuan, XIANGJinle, CHENShuxing, et al. Effects of pomegranate peel polyphenols on cholesterol efflux and related protein expression[J]. Food & Machinery,2019,(2):11-14.

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  • 收稿日期:2018-10-12
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  • 在线发布日期: 2022-11-26
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