食品科学

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长柄侧耳胞外多糖PSEPS2-A的分离纯化及降血糖活性

李 灿1,2,胡 芳1,朱瑞娟1,陈同强2,邓西贝3,王淑敏3,封士兰3,*   

  1. 1.兰州大学药学院,甘肃 兰州 730000;2.湖南省食品质量监督检验研究院,湖南 长沙 410111;
    3.长春中医药大学药学院,吉林 长春 130117
  • 出版日期:2015-04-15 发布日期:2015-05-05

Purification and Hypoglycemic Effect of Extracellular Polysaccharide from Pleurtus spodotecus Fr.

LI Can1,2, HU Fang1, ZHU Ruijuan1, CHEN Tongqiang2, DENG Xibei3, WANG Shumin3, FENG Shilan3,*   

  1. 1. School of Pharmacy, Lanzhou University, Lanzhou 730000, China; 2. Hunan Institute of Food Quality Supervision Inspection and Research,
    Changsha 410111, China; 3. School of Pharmaceutical Sciences, Changchun University of Chinese Medicine, Changchun 130117, China研究长柄侧耳胞外多糖分离纯化方法及对糖尿病小鼠的降血糖作用。从长柄侧耳液体发酵液中提取出长
    柄侧耳胞外多糖,采用Sevag法除蛋白、H2O2脱色素、透析和Sepadex G-200、100柱色谱分离纯化得到一种分子质
    量单一的多糖组分PSEPS2-A,以凝胶渗透色谱与光散射仪联用技术(gel permeation chromatography-eighteen angle
    laser scattering detector,GPC-MALLS)和元素分析等其他化学分析法考察多糖的理化性质。以四氧嘧啶诱导建
    立糖尿病小鼠模型,通过不同剂量PSEPS2-A治疗,比较治疗前后小鼠体质量及空腹血糖值、糖耐量水平、脏器
    指数、肝组织肝糖原水平变化。结果表明:PSEPS2-A的分子质量为6.268×105 D,在0.9% NaCl溶液中为棒状结构的
    多糖。PSEPS2-A能显著降低糖尿病小鼠空腹血糖值(P<0.05)和血糖曲线下面积(P<0.05),减缓糖尿病小鼠体
    质量的负增长;显著降低肝脏、肾脏脏器指数(P<0.05),显著升高肝糖原水平(P<0.05),促进肝糖原合成。
    PSEPS2-A是一种新的长柄侧耳胞外多糖,在一定剂量下具有调节糖代谢、降低血糖、改善糖尿病症状的作用。
  • Online:2015-04-15 Published:2015-05-05

摘要:

研究长柄侧耳胞外多糖分离纯化方法及对糖尿病小鼠的降血糖作用。从长柄侧耳液体发酵液中提取出长柄侧耳胞外多糖,采用Sevag法除蛋白、H2O2脱色素、透析和Sepadex G-200、100柱色谱分离纯化得到一种分子质量单一的多糖组分PSEPS2-A,以凝胶渗透色谱与光散射仪联用技术(gel permeation chromatography-eighteen anglelaser scattering detector,GPC-MALLS)和元素分析等其他化学分析法考察多糖的理化性质。以四氧嘧啶诱导建立糖尿病小鼠模型,通过不同剂量PSEPS2-A治疗,比较治疗前后小鼠体质量及空腹血糖值、糖耐量水平、脏器指数、肝组织肝糖原水平变化。结果表明:PSEPS2-A的分子质量为6.268×105 D,在0.9% NaCl溶液中为棒状结构的多糖。PSEPS2-A能显著降低糖尿病小鼠空腹血糖值(P<0.05)和血糖曲线下面积(P<0.05),减缓糖尿病小鼠体质量的负增长;显著降低肝脏、肾脏脏器指数(P<0.05),显著升高肝糖原水平(P<0.05),促进肝糖原合成。PSEPS2-A是一种新的长柄侧耳胞外多糖,在一定剂量下具有调节糖代谢、降低血糖、改善糖尿病症状的作用。

关键词: 长柄侧耳, 胞外多糖, 分离纯化, 糖尿病, 降血糖

Abstract:

This study was conceived to investigate the isolation, purification and hypoglycemic effect of extracellular
polysaccharides from Pleurtus spodotecus Fr. in diabetic mice. A homogeneous extracellular polysaccharide named as
PSEPS2-A was extracted from the fermented broth of Pleurtus spodotecus Fr.. Then PSEPS2-A was treated with Sevag
method, H2O2 and purified with Sephadex gel filtration chromatography. GPC-MALLS and other methods were utilized to
examine the physical and chemical properties of PSEPS2-A. The absolute molecular weight of PSEPS2-A was 6.268 × 105 D
and the structure was rod-like in 0.9% NaCl solution. Diabetic mice induced by Alloxan were subjected to continuous
intragastric administration with different doses of PSEPS2-A. The changes in body weight, fasting blood glucose (FBG),
glucose tolerance, organ index, and liver glycogen in diabetic mice were determined before and after the treatment.
PSEPS2-A could significantly reduce the content of FBG (P < 0.05) and the area under curve of blood glucose (P < 0.05).
The symptom of negative growth of body weights was slowed down and the organ index was decreased in diabetic mice.
PSEPS2-A also could significantly promote liver glycogen synthesis and elevate the level of liver glycogen. PSEPS2-A
is a new extracellular polysaccharide from Pleurtus spodotecus Fr., which plays an important role in regulating glucose
metabolism, lowering blood sugar, and improving diabetic symptoms at a certain concentration.

Key words: Pleurtus spodotecus Fr., extracellular polysaccharides, isolation and purification, diabetes, hypoglycemic

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