Structural analysis and antioxidant activities of neutral polysaccharide isolated from Epimedium koreanum Nakai.
Carbohydr Polym
; 196: 246-253, 2018 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-29891293
ABSTRACT
The structure and antioxidant activity of a neutral polysaccharide (named as EFPN-1) from Epimedium koreanum Nakai were studied. Based on the results from high performance gel permeation chromatography, methylation GC-MS and 1D/2D nuclear magnetic resonance spectroscopy, EFPN-1 was a branched polysaccharide with a molecular weight of 21.9â¯kD and containing over 60% of glucose. Its backbone was composed of (1â¯ââ¯4)-ß-d-Glcp and (1â¯ââ¯3)-ß-d-Galp, branched partially at O-6 of both residues, with a degree of branching of 40.4% and terminated mainly with Ara and Gal, as well as trace amount of Gal. Antioxidant tests showed that EFPN-1 exhibited a strong capacity on DPPH and hydroxyl radical scavenging, ferrous ion chelation and reducing antioxidant powder. EFPN-1 has potential to be developed as a natural antioxidant.
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MEDLINE
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En
Ano de publicação:
2018
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Article