4.7 Article

Structural characterization of polysaccharides with potential antioxidant and immunomodulatory activities from Chinese water chestnut peels

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CARBOHYDRATE POLYMERS
卷 246, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116551

关键词

Chinese water chestnut peels; Polysaccharides; Structural features; Antioxidant activity; Immunomodulatory activity

资金

  1. China Postdoctoral Science Foundation [2019M662931]

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Chinese water chestnut peels are a kind of vegetable processing waste containing many active components such as polysaccharides, the structure of which remains unknown. To elucidate the structure of polysaccharides from Chinese water chestnut peels, two polysaccharides named WVP-1 and WVP-2 were isolated. WVP-1 (3.16 kDa) consisted of mannose (1.75 %), glucose (84.69 %), galactose (6.32 %), and arabinose (7.24 %), while WVP-2 (56.97 kDa) was composed of mannose (3.18 %), rhamnose (1.52 %), glucuronic acid (1.42 %), galacturonic acid (4.83 %), glucose (11.51 %), galactose (36.02 %), and arabinose (41.53 %). Linkage and NMR data indicated that WVP-1 was composed mainly of -> 4)-alpha-D-Glcp(1 -> and a certain proportion of -> 3)-beta-D-Glcp-(1 ->, including linear and branched polysaccharides simultaneously. WVP-2 was a pectin-like polysaccharide with -> 4)-alpha-D-GalpA6Me-(1 -> units and the branch points of -> 3,4)-alpha-L-Arap-(1 ->, -> 3,6)-beta-D-Galp-(1 ->. WVP-2 exhibited stronger potential antioxidant and immunomodulatory activities than WVP-1 in vitro. These results provide a foundation for the further study of polysaccharides from Chinese water chestnut peels.

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