Insights into the pigment and non-pigment phenolic profile of polyphenol extracts of jujube peel and their antioxidant and lipid-lowering activities  

作　　者：Jin-Feng Dou Cai-E Wu Gong-Jian Fan Ting-Ting Li Xiao-Jing Li Dan-Dan Zhou Jin-Peng Zhu Chun-Mei Li 

机构地区：[1]College of Light Industry and Food Engineering,Nanjing Forestry University,Nanjing,Jiangsu,210037,China [2]College of Life and Health Sciences,Anhui Science and Technology University,Fengyang,233100,China [3]College of Food Science and Technology,Huazhong Agricultural University,Wuhan,Hubei,430070,China [4]Co-Innovation Center for Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing,210037,China

出　　处：《Food Bioscience》2023年第2期1193-1203,共11页食品生物科学（英文）

基　　金：This work was supported by the National Key R&D Program of China(2019YFD1002300);the North Jiangsu Science and Technology Project(XZ-SZ201929).

摘　　要：This study aimed to provide a comprehensive overview of the pigment and non-pigment phenolic profile of polyphenol extracts of jujube peel and their bioactivities.Firstly,the pigment and non-pigment phenolic composition as well as antioxidant activities of free and bound polyphenol extracts in jujube peel were compared among twelve varieties systematically.Then the antioxidant and lipid-lowering activities of free and bound polyphenol extracts of‘Junzao’jujube peel were investigated representatively.Overall,23 phenolic compounds were identified,in which flavonols were the main pigments and all varieties showed similar qualitative patterns but different quantitative characteristics.The antioxidant activities significantly correlated with the content of total phenolics and total flavonoids.Furtherly,both free and bound polyphenol extracts of‘Junzao’jujube peel exhibited DPPH,ABTS free radical scavenging capacity,and oxygen radical absorbance capacity in a dose-dependent manner.Besides,both of them improved the resistance of Caenorhabditis elegans under H_(2)O_(2) oxidative stress and heat stress at 37℃(20-100μg/mL).What’s more,compared to free polyphenol extract,bound polyphenol extract decreased the level of body lipid accumulation and triglyceride more effectively.These results suggest that jujube peel is an exploitable source of natural flavonoid pigments and phenolic ingredients with strong antioxidant and lipid-lowering properties.

关 键 词：Jujube peel POLYPHENOLS Antioxidant properties Lipid-lowering activity Caenorhabditis elegans 

分 类 号：TS201.2[轻工技术与工程—食品科学]