title: Antioxidant and immunoregulatory activity of polysaccharides from quinoa (Chenopodium quinoa Willd.).
abstract: The water-extractable (QWP) and the alkali-extractable (QAP) polysaccharides from quinoa (named QWP and QAP, respectively) and their four polysaccharide sub-fractions (QWP-1, QWP-2, QAP-1 and QAP-2), were isolated and purified by anion-exchange and gel filtration chromatography. QWP-1 and QWP-2 were composed of Rha, Ara, Gal and GalA. QAP-1 and QAP-2 were composed of Rha, Ara, Man, Gal and GalA. Antioxidant and immunoregulatory activities of the polysaccharides were evaluated. The results showed that QWP-1, QWP-2, QAP-1 and QAP-2 had significant antioxidant and immunoregulatory activities. The results suggest that QWP-1, QWP-2, QAP-1 and QAP-2 could be used as potential antioxidants and immunomodulators.
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China. yaoyang@caas.cn.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China. shizhenxingmu@gmail.com.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China. renguixing@caas.cn.
authors.forename: Guixing
authors.initials: G
authors.lastname: Ren
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D027465:Chenopodium quinoa / Q000737:chemistry*; D007155:Immunologic Factors / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D007155:Immunologic Factors; D010936:Plant Extracts; D011134:Polysaccharides