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Journal of Chinese Pharmaceutical Sciences

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Evaluation of the physicochemical properties and antioxidant activities of polysaccharides from Semen Euryales

Rong Chen1, Man Xue1, Wei Chen2, Qinan Wu3*   

  1. 1. Suzhou Institute for Food and Drug Control, Jiangsu Suzhou 215104, China
    2. Suzhou Hospital of Traditional Chinese Medicine, Jiangsu Suzhou 215009, China
    3. Jiangsu Key Laboratory for TCM Formulae Research, Nanjing University of Chinese Medicine, Jiangsu Nanjing 210046, China
  • Received:2014-02-17 Revised:2014-05-13 Online:2014-08-31 Published:2014-05-20
  • Contact: Tel.: 86-25-85811507, Fax: 86-25-85811524
  • Supported by:
    National Key Research and Development Program of the Ministry of Science and Technology of China during the “12th Five-Year Plan” (Grant No. 2011BAI04B06).

Abstract:

Polysaccharides were isolated from Semen Euryales by water extraction, alcohol precipitation and deproteinization. A refined polysaccharide, named EPJ, was separated into nine fractions by DEAE-52 cellulose chromatography and one of them was separated into two fractions by Sephadex G-100 column. The molecular weight of EPJ was determined to 15 367 Da and the monosaccharide composition was mainly glucose and rhamnose with the molar ratio of 5.46:1. The FT-IR spectra showed carbohydrate-related absorbance of polysaccharide functional groups. In vitro assay showed EPJ could significantly scavenge DPPH radical, superoxide anion, hydrogen peroxide and exhibited a strong reducing power. In vivo assay indicated that EPJ was effective in a D-galactose induced aging mice model. Results showed EPJ significantly inhibited formation of MDA and increased the activities of SOD, CAT, GSH-Px in a dose-dependent manner in mice tissues. The findings obtained from this study indicated that polysaccharides from Semen Euryales could be explored for a wide prospect of benefit.

Key words: Semen Euryales, Polysaccharide, Physicochemical properties, Antioxidant activities

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