Structural Characterization, Phenolic Acid Modification, and Antioxidant Activities of Polysaccharide From Mogroside Waste Liquid of Siraitia grosvenorii
文献类型: 外文期刊
作者: Duan, Jiajing;Sun, Yufeng;Wang, Bo;Xie, Qinfei;Ju, Yang;Wang, Fengzhong;Fan, Bei
作者机构:
关键词: antioxidant;modification;phenolic acid;Siraitia grosvenorii polysaccharide;structure
期刊名称: FOOD FRONTIERS
ISSN:
年卷期: 2025 年
页码:
收录情况: EI(2025版) ; ; ESCI(2025版)
摘要: To improve the comprehensive utilization of Siraitia grosvenorii (Swingle) C. Jeffrey, a novel polysaccharide (SGP) was isolated from the mogroside waste liquid of S. grosvenorii. In addition, ferulic acid-SGP (FA-SGP) and caffeic acid-SGP (CA-SGP) were prepared by modifying SGP with phenolic acid. The structural characteristics and antioxidant activities of the three polysaccharides were analyzed. SGP displayed a pore-like structure and was mainly composed of glucose and xylose with a molecular weight of 2.64 kDa. It was a pyran-type polysaccharide with both alpha-glycosidic and beta-glycosidic bonds. The linkage types were Glcp-(1 -> D -> 3)-Glcp-(1 ->, -> 4)-Glcp-(1 ->, -> 6)-Glcp-(1 ->, -> 3,6)-Glcp-(1 ->. FA and CA were covalently attached to SGP by ester bonds, and the molecular weights of FA-SGP and CA-SGP were 5.34 and 3.83 kDa, respectively. They formed a tightly interconnected reticulation structure. Activities tests demonstrated that compared to the native SGP, FA-SGP and CA-SGP could significantly enhance the antioxidant capacity and improve the protective effects on H2O2-damaged SH-SY5Y cells. The regulation of FA-SGP and CA-SGP toward the oxidative stress in SH-SY5Y cells might be related to the Bcl-2/Caspase-3/Bax signaling pathways. In this study, phenolic acid grafts with excellent antioxidant activity were prepared using SGP as the lead compound. This provided a new direction for obtaining S. grosvenorii products with satisfactory bioactivity and a reference for the deep processing of S. grosvenorii industry.
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