Journal
CARBOHYDRATE POLYMERS
Volume 92, Issue 2, Pages 2111-2117Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.11.074
Keywords
Gynostemma pentaphyllum Makino polysaccharide; Structure analysis; Antioxidant activity; Bile acid-binding capacity
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Funding
- China Postdoctoral Science Foundation [2012M511098]
- Joint Institute for Food Safety and Applied Nutrition (JIFSAN)
- SJTU [TS0414115001, TS0320215001]
- Major National Science and Technology Project of China for Significant New Drugs Creation [2012ZX09502001-004]
- Asian Citrus Holdings Limited (Hong Kong)
- special fund for Agro-Scientific Research in the Public Interest [201203069]
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A novel water-soluble polysaccharide (GPP), with a molecular mass of 7.1 x 10(3) Da, was isolated from the defatted whole-plant of diploid Gynostemma pentaphyllum Makino. Monosaccharide composition analysis indicated that GPP was a heteropolysaccharide mainly containing mannose, glucose, galactose and arabinose, at a molar ratio of 1.00:77.33:4.81:1.83. The detailed structure analysis revealed that GPP consisted of a (1 -> 4)-alpha-D-glucoside backbone with a 1 ->)-alpha-D-glucopyranosyl branch at the C-6 position of (1 -> 4,6)-linked-alpha-D-glucopyranosyl on every 5 monosaccharide residues, with a few mannose, galactose and arabinose terminal residues. GPP exhibited scavenging capacities against hydroxyl, peroxyl and DPPH radicals in vitro, and had a greater bile acid-binding ability than psyllium on a per weight basis. These results suggested a potential application of GPP in functional foods and dietary supplements. (C) 2012 Elsevier Ltd. All rights reserved.
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