Degradation of sulfated polysaccharides from Enteromorpha prolifera and their antioxidant activities

被引：233

作者：

Li, Bing ^{[1
,2
]}

Liu, Song ^{[1
]}

Xing, Ronge ^{[1
]}

Li, Kecheng ^{[1
,2
]}

Li, Rongfeng ^{[1
,2
]}

Qin, Yukun ^{[1
,2
]}

Wang, Xueqin ^{[1
,2
]}

Wei, Zhenhua ^{[1
,2
]}

Li, Pengcheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2013年 / 92卷 / 02期

关键词：

Enteromorpha prolifera; Sulfated polysaccharide; Microwave-assistance; Molecular weight; Antioxidant activity; DIFFERENT MOLECULAR-WEIGHT; RADICAL SCAVENGING ACTIVITY; IN-VITRO; EXTRACTS; CHITOSAN; CHLOROPHYTA; RELEVANCE; FUCOIDAN;

D O I：

10.1016/j.carbpol.2012.11.088

中图分类号：

O69 [应用化学];

学科分类号：

070301 [无机化学];

摘要：

The effects of degradation on molecular weights (Mws) of polysaccharides from Enteromorpha prolifera were investigated. Microwave-assistance could highly accelerate reaction rate. Six representative sulfated polysaccharides (Mw 446.5, 247.0, 76.1, 19.0, 5.0 and 3.1 KDa) were prepared by a microwave-assistance acid hydrolysis method. Chemical analysis and FT-IR spectrum showed only glycosidic linkages were cleft without breaking significant structural units. Antioxidant activities of representative polysaccharides revealed that all samples showed great inhibitory effects on superoxide radical at a low concentration compared to Vitamin C and samples with high Mws exhibited higher inhibitory effects. On the contrary, samples with low Mws possessed stronger inhibitory effects on hydroxyl radical, IC50 of Mw 3.1 KDa was 0.39 mg/mL. The chelating effect of Mw 3.1 KDa was 77.3% at 5 mg/mL, which was twice more than initial polysaccharide. The study indicated Mw was the most significant factor to influence antioxidant activities of polysaccharides from E. prolifera. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1991 / 1996

页数：6

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