Optimized Degradation and Inhibition of alpha-glucosidase Activity by Gracilaria lemaneiformis Polysaccharide and Its Production In Vitro

文献类型： 外文期刊

第一作者： Long, Xiaoshan

作者： Long, Xiaoshan;Hu, Xiao;Xiang, Huan;Chen, Shengjun;Li, Laihao;Yang, Xianqing;Long, Xiaoshan;Hu, Xiao;Yang, Xianqing;Long, Xiaoshan;Liu, Shucheng;Zhou, Shaobo;Xiang, Huan;Chen, Shengjun;Li, Laihao

作者机构：

关键词： Gracilaria lemaneiformis; polysaccharide; degradation optimization; chemical characteristics; hypolipidemic activity; alpha-glucosidase

期刊名称：MARINE DRUGS （ 影响因子：6.085； 五年影响因子：6.044 ）

ISSN：

年卷期： 2022 年 20 卷 1 期

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收录情况： SCI

摘要： Gracilaria lemaneiformis polysaccharide (GLP) exhibits good physiological activities, and it is more beneficial as it is degraded. After its degradation by hydrogen peroxide combined with vitamin C (H2O2-Vc) and optimized by Box-Behnken Design (BBD), a new product of GLP-HV will be generated. While using GLP as control, two products of GLP-H (H2O2-treated) and GLP-V (Vc-treated) were also produced. These products chemical characteristics (total sugar content, molecular weight, monosaccharide composition, UV spectrum, morphological structure, and hypolipidemic activity in vitro) were assessed. The results showed that the optimal conditions for H2O2-Vc degradation were as follows: H2O2-Vc concentration was 18.7 mM, reaction time was 0.5 h, and reaction temperature was 56 & DEG;C. The total sugar content of GLP and its degradation products (GLP-HV, GLP-H and GLP-V) were more than 97%, and their monosaccharides are mainly glucose and galactose. The SEM analysis demonstrated that H2O2-Vc made the structure loose and broken. Moreover, GLP, GLP-HV, GLP-H, and GLP-V had significantly inhibition effect on alpha-glucosidase, and their IC50 value were 3.957, 0.265, 1.651, and 1.923 mg/mL, respectively. GLP-HV had the best inhibition effect on alpha-glucosidase in a dose-dependent manner, which was the mixed type of competitive and non-competitive. It had a certain quenching effect on fluorescence of alpha-glucosidase, which may be dynamic quenching.

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