Chemical composition, antioxidant and cytoprotective activities of lotus receptacle

文献类型： 外文期刊

第一作者： Shen, Ting

作者： Shen, Ting;Wang, Xinfeng;Wu, Lei;Ji, Lilian;Hu, Weicheng;Shen, Ting;Wang, Xinfeng;Wu, Lei;Ji, Lilian;Wang, Gongcheng;Wang, Yuning;Li, Pengxia;Hu, Boran

作者机构：

关键词： antioxidant;chemical composition;lotus receptacle;reactive oxygen species;quercetin-3-O-beta-D-glucopyranoside

期刊名称：Horticulture Environment and Biotechnology （ 影响因子：1.842； 五年影响因子：2.083 ）

ISSN： 2211-3452

年卷期： 2015 年 56 卷 5 期

页码：

收录情况： SCI

摘要： The nutritional composition (ash, protein, fat, crude fiber, and carbohydrate) and antioxidant activity of lotus receptacles (LRs) were studied. The LRs contained 88.25% carbohydrates, 22.90% crude fiber, 5.79% crude ash, 0.77% crude protein content, and 5.19% crude lipid on a dry weight basis. The ethanolic extract of lotus receptacle (ELR) exerted strong scavenging effects on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical, hydroxyl radical (center dot OH), superoxide anion (O2-), and hydrogen peroxide (H2O2), as well as high reducing power. ELR pretreatment effectively elevated cell viability and decreased malondialdehyde (MDA) levels in H2O2-treated RAW 264.7 cells. Additionally, ELR had high phenolic and flavonoid contents with values of 318.15 mg gallic acid equivalent/g and 239.06 mg rutin equivalent/g, respectively. Moreover, the bioactivity-guided study of ELR resulted in the isolation and identification of quercetin-3-O-beta-D-glucopyranoside (QOG), a dietary flavonoid. QOG exhibited strong DPPH free radical scavenging activity, with an IC50 value of 24.26 mu M; docking studies revealed that QOC formed one hydrogen bond with LYS263 in the active site, suggesting it is, in part, responsible for the free activity of LR.

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