期刊
FOOD CHEMISTRY
卷 138, 期 1, 页码 306-314出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.10.061
关键词
Bullacta exarata; Mucilage; Sulphated polysaccharides; Structure; Antitumour activity
资金
- Fundamental Research Funds for the Central Universities
- Zhejiang Key Laboratory of Coastal Bio-resource, P. R. China
Three sulphated polysaccharides, coded as BEMPA, BEMPB1, BEMPB2, were extracted from the mucilage of mud snail of Bullacta exarata and purified by DEAE-cellulose ion-exchange and size-exclusion chromatography. Structural analysis of purified polysaccharides by chemical and biochemical methods revealed BEMPA was a high (1 -> 3,4)-linked mannose-containing polysaccharide with molecular weight of 22,977 Da. BEMPB1, with molecular weight of 64,117 Da, was a high (1 -> 3)-linked arabinose-containing polysaccharide. BEMPB2 was mainly composed of (1 -> 3,4)-linked mannose with molecular weight of 47,507 Da. The comparison between sulphated polysaccharides and their desulphated products showed that sulphate substitutions of BEMPB1 were deduced to be at the C-3 of (1 -> 4)-linked mannose, while sulphate substitutions of BEMPA and BEMPB2 were at C-4 of (1 -> 3)-linked mannose. Furthermore, BEMPA exhibited highest inhibitory effects on growth of B-16 melanoma cells, and IC50 were 31.1 mu g/mL. (C) 2012 Elsevier Ltd. All rights reserved.
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