Antioxidant Activity of Polysaccharide-enriched Fractions Extracted from Pulp Tissue of Litchi Chinensis Sonn.
文献类型: 外文期刊
作者: Kong, Fanli 1 ; Zhang, Mingwei 1 ; Liao, Sentai 1 ; Yu, Shujuan 2 ; Chi, Jianwei 1 ; Wei, Zhencheng 1 ;
作者机构: 1.Guangdong Acad Agr Sci, Key Lab Funct Food, Minist Agr, Biotech Res Inst, Guangzhou 510610, Guangdong, Peoples R China
2.S China Univ Technol, Coll Light Ind & Food Sci, Guangzhou 510640, Guangdong, Peoples R China
关键词: antioxidant activity;litchi;polysaccharide;functional food
期刊名称:MOLECULES ( 影响因子:4.411; 五年影响因子:4.587 )
ISSN: 1420-3049
年卷期: 2010 年 15 卷 4 期
页码:
收录情况: SCI
摘要: 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.
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