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- Title
Antioxidant Activity of Polysaccharide-enriched Fractions Extracted from Pulp Tissue of Litchi Chinensis Sonn.
- Authors
Fanli Kong; Mingwei Zhang; Sentai Liao; Shujuan Yu; Jianwei Chi; Zhencheng Wei
- Abstract
Natural antioxidants such as polysaccharides with strong antioxidant activities are used to protect against oxidative damage, yet little is known so far about the antioxidant effects of litchi fruit polysaccharides. In the present study, four different polysaccharide-enriched fractions were isolated from litchi pulp tissue and partially purified by a stepwise method of ethyl alcohol (EtOH) precipitation. Their chemical and physical characteristics were determined by chemical methods, gas chromatography and IR spectrophotometry. Antioxidant activities of these fractions were investigated using various in vitro assay systems. These four polysaccharide-enriched fractions exhibited a dose-dependent free radical scavenging activity as shown by their DPPH radical, superoxide anion and hydroxyl radical inhibition, chelating ability and reducing power. Among the different fractions, LFP-III showed the strongest scavenging activity against DPPH radical, superoxide and hydroxyl radicals and chelating ability. These findings suggest litchi polysaccharides from pulp tissue have potential as functional foods with enhanced antioxidant activity.
- Subjects
ANTIOXIDANTS; LITCHI; POLYSACCHARIDE synthesis; FUNCTIONAL foods; CHROMATOGRAPHIC analysis; FRUIT; ALCOHOL; GAS chromatography; SPECTROPHOTOMETRY; THERAPEUTICS
- Publication
Molecules, 2010, Vol 15, Issue 4, p2152
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules15042152