食品科学 ›› 2013, Vol. 34 ›› Issue (23): 83-87.doi: 10.7506/spkx1002-6630-201323018

• 基础研究 • 上一篇    下一篇

抗氧化钝顶螺旋藻多糖的分离纯化

蔡冰娜1,陈纯馨2,陈 忻2,孙恢礼1,3,陈燕云2,潘剑宇1,*   

  1. 1.中国科学院南海海洋研究所,热带海洋生物资源与生态重点实验室,广东 广州 510301;
    2.佛山科学技术学院理学院,广东 佛山 528000;3.中国科学院研究生院,北京 100049
  • 收稿日期:2013-06-15 修回日期:2013-10-30 出版日期:2013-12-15 发布日期:2014-01-03
  • 通讯作者: 潘剑宇 E-mail:jypan@scsio.ac.cn
  • 基金资助:

    海洋公益性行业科研专项经费项目(201305018-2);“十二五”国家科技支撑计划项目(2012BAD33B10);
    广东省产学研合作项目(2011B090300057);国家自然科学基金青年科学基金项目(31101271);
    中国科学院知识创新工程重要项目(KZCX2-YW-Q214)

Isolation and Purification of Antioxidative Polysaccharides from Spirulina platensis

CAI Bing-na1,CHEN Chun-xin2,CHEN Xin2,SUN Hui-li1,3,CHEN Yan-yun2,PAN Jian-yu1,*   

  1. 1. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences,
    Guangzhou 510301, China;2. School of Science, Foshan University, Foshan 528000, China;
    3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-06-15 Revised:2013-10-30 Online:2013-12-15 Published:2014-01-03
  • Contact: PAN Jian-yu E-mail:jypan@scsio.ac.cn

摘要:

研究抗氧化的钝顶螺旋藻多糖,对其进行分离纯化。首先采用碱液热浸提,再用95%乙醇沉淀提取螺旋藻多糖,考察粗多糖对·OH及O2-·的清除活性,之后采用DEAE阴离子纤维素柱和葡聚糖凝胶层析法进行分离纯化及分子质量测定,红外色谱初步研究其结构。结果表明:钝顶螺旋藻多糖清除自由基能力较高,其中多糖质量浓度为0.6mg/mL时对·OH清除能力为(37.01±1.58)U/mL;多糖质量浓度为0.4mg/mL时清除O2-·能力为(47.84±2.46)U/mL。分离纯化得到4个主要的水溶性酸性糖蛋白SP1-2、SP2-1、SP3-1和SP4-1,分子质量依次为4.18×104、5.11×104、2.80×104D和3.76×104D,SP3-1的红外光谱呈现出典型的糖蛋白特征峰。

关键词: 钝顶螺旋藻;多糖;·, OH;O2·, ;分离纯化

Abstract:

Crude polysaccharides with antioxidant activity were obtained from S. platensis through extraction with a hot
alkali solution followed by precipitation with 95% ethanol. The scavenging activities against hydroxyl and superoxide
anion free radicals of the crude polysaccharides were evaluated. Further studies were carried out to separate and purify
the crude polysaccharide extract by chromatography on a DEAE-52 cellulose column and measure the molecular masses
and IR spectroscopic features of fractions. The crude polysaccharides extracted from S. platensis had a potent free radical
scavenging activity, and the scavenging capacity was (37.01 ± 1.58) U/mL and (47.84 ± 2.46) U/mL for hydroxyl and
superoxide anion radicals when used at concentrations of 0.6 mg/mL and 0.4 mg/mL, respectively. Four water-soluble acidic
fractions designated as SP1-2, SP2-1, SP3-1 and SP4-1 were obtained with molecular weight of 4.18 × 104, 5.11 × 104, 2.80 ×
104 D and 3.76 × 104 D. The infrared (IR) spectrum of SP3-1 showed the characteristic absorption of glycoprotein. These
results indicate that S. platensis polysaccharides may be used as an effective antioxidant in functional foods.

Key words: Spirulina platensis, polysaccharide, hydroxyl radical, superoxide anion radical, isolation and purification

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