Physicochemical characterization of a high molecular weight bioactive beta-D-glucan from the fruiting bodies of Ganoderma lucidum

文献类型: 外文期刊

第一作者: Liu, Yanfang

作者: Liu, Yanfang;Zhang, Jingsong;Tang, Qingjiu;Yang, Yan;Wu, Di;Guo, Qingbin;Wang, Qi;Cui, Steve W.

作者机构:

关键词: Ganoderma lucidum;Conformation;HPSEC;DSC;Immunomodulation activity

期刊名称:CARBOHYDRATE POLYMERS ( 影响因子:9.381; 五年影响因子:8.678 )

ISSN: 0144-8617

年卷期: 2014 年 101 卷

页码:

收录情况: SCI

摘要: A purified polysaccharide coded as GLP20 was obtained by precipitating a hot-water extract from Ganoderma lucidum fruiting bodies with 20% (V/V) ethanol. Its total carbohydrate content was 95.9%. Structural analysis showed that GLP20 was a beta-(1 -> 3)-linked D-glucan with a (1 -> 6)-beta-D-glucopyranosyl side-branching unit on every third residue. Cell culture study revealed that GLP20 can significantly increase NO production of RAW264.7 macrophages. The analysis of light scattering and high performance size exclusion chromatography (HPSEC) showed that the molecular weight and polydispersity of GLP20 was 3.75 x 10(6) Da and 1.36, respectively. GLP20 had a rigid chain conformation in aqueous solution. A conformation transition occurred in the alkaline solution with NaOH concentration larger than 0.15 M. The transition from ordered structure to single chain happened when GLP20 was heated above 135 degrees C in water solution and was irreversible as demonstrated by differential scanning calorimetry (DSC). GLP20 existed as random coils in DMSO. (C) 2013 Elsevier Ltd. All rights reserved.

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