Structural characteristics and anti-inflammatory activity of UV/H2O2-treated algal sulfated polysaccharide from Gracilaria lemaneiformis

文献类型： 外文期刊

第一作者： Gong, Yufeng

作者： Gong, Yufeng;You, Lijun;Ma, Yongxuan;Ma, Yongxuan;Cheung, Peter Chi-Keung;You, Lijun;Liao, Lan;Pedisic, Sandra;Kulikouskaya, Viktoryia

作者机构：

关键词： Gracilaria lemaneiformis; Sulfated polysaccharide; UV; Molecular weight; Inflammation

期刊名称：FOOD AND CHEMICAL TOXICOLOGY （ 影响因子：6.025； 五年影响因子：5.847 ）

ISSN： 0278-6915

年卷期： 2021 年 152 卷

页码：

收录情况： SCI

摘要： The study aimed to study the effects on structural characteristics and anti-inflammatory activities of algal sulfated polysaccharides isolated from Gracilaria lemaneiformis (GLP) after a combined treatment of UV irradiation (average irradiance of 6500 mJ/cm(2)) and H2O2 (50 mmol/L) for various time periods up to 60 min. After a 30-min treatment, the molecular weight and particle size of GLP was decreased by 15 and 2.6 fold, respectively with small but significant decrease in the contents of total sugars, uronic acids and proteins. There seemed to have no starch and the presence of longer side chains of branches in the GLP samples before and after UV/H2O2 treatment based on the I-2-KI assay. Scanning electron microscope and atomic force microscope analysis confirmed that the UV/H2O2 treatment could modify the surface morphology of GLP. GLP treated for 5 min possessed the strongest in vitro anti-inflammatory activity by inhibiting the production of nitric oxide, tumor necrosis factor- a and interleukin-6 by 60.49%, 62.81% and 36.29%, respectively in IEC-6 cells when compared to the model. Therefore, UV/H2O2 treatment had the potential to enhance the anti-inflammatory activity of algal sulfated polysaccharides.

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