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Characterization and immunostimulatory activity of an (1-->6)-a-D-glucan from the root of Ipomoea batatas.

Abstract：

:The polysaccharide PSPP (purified sweet potato polysaccharide), isolated and purified from the roots of Ipomoea batatas, was found to be a glucan with a molecular weight of 53.2 kDa and specific rotation of +115.0 degrees (ca. 0.80, H(2)O). On the basis of methylation analysis, periodate oxidation, Smith degradation, infra-red spectroscopy, and (13)C NMR, the polysaccharide was confirmed as a (1-->6)-alpha-D-glucan. We evaluated the effects of polysaccharide PSPP on the in vivo immune function of mouse. Mice were treated with the polysaccharide PSPP (50, 150, and 250 mg/kg body weight) for 7 days. Phagocytic function, proliferation of lymphocytes, natural killer cell activity, hemolytic activity, and serum IgG concentration of the mice were studied. At the dose of 50 mg/kg, significant increments in proliferation of lymphocytes (P<0.05) and serum IgG concentration (P<0.05) were observed. At the dose of 150 and 250 mg/kg, significant increments (P<0.01 or P<0.05) were observed in all tested immunological indexes. A dose-dependent manner was demonstrated in phagocytic function, hemolytic activity, and serum IgG concentration, but not in proliferation of lymphocytes and natural killer cell activity. This suggests that PSPP improve the immune system and could be regarded as a biological response modifier.

journal_name

Int Immunopharmacol

journal_title

International immunopharmacology

authors

Zhao G,Kan J,Li Z,Chen Z

doi

10.1016/j.intimp.2005.03.012

keywords:

subject

Has Abstract

pub_date

2005-08-01 00:00:00

pages

1436-45

issue

9

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(05)00094-9

journal_volume

5

pub_type

杂志文章

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