食品科学 ›› 2010, Vol. 31 ›› Issue (23): 52-56.doi: 10.7506/spkx1002-6630-201023013

• 基础研究 • 上一篇    下一篇

印度块菌水溶性多糖的单糖组成与抗氧化活性研究

罗 强,颜 亮,吴俐莎,张 杰,杨志荣,孙 群*   

  1. 四川大学生命科学学院,生物资源与生态环境教育部重点实验室
  • 收稿日期:2010-09-07 出版日期:2010-12-15 发布日期:2010-12-29
  • 通讯作者: 孙 群* E-mail:qunsun@scu.edu.cn
  • 基金资助:

    “十一五”国家科技支撑计划项目(2006BAD27B09;2006BAD04A12);国家“863”计划项目(2007AA10Z320)

Monosaccharide Compositions and Antioxidant Activity of Water-soluble Polysaccharide Isolated from Tuber indicum

LUO Qiang,YAN Liang,WU Li-sha,ZHANG Jie,YANG Zhi-rong,SUN Qun*   

  1. Key Laboratory of Bio-Resource and Eco-environment, Ministry of Education, College of Life Sciences,
    Sichuan University, Chengdu 610065, China
  • Received:2010-09-07 Online:2010-12-15 Published:2010-12-29
  • Contact: SUN Qun* E-mail:qunsun@scu.edu.cn

摘要:

采用水提醇沉法对印度块菌子实体水溶性粗多糖进行提取,并通过酶法-Sevag 法联用脱蛋白,DEAE52 纤维素Sephadex G-100 柱层析对其进行分离纯化,得到主要多糖组分TIP-A。采用高效凝胶渗透色谱(HPGPC)对其均一性进行验证,测定出相对分子质量(Mr)为17500。气相色谱质谱联用(GC-MS)分析表明,TIP-A 是由D- 甘露糖、D- 葡萄糖、D- 半乳糖、L- 鼠李糖组成的均一杂多糖,物质的量比约为7:2:2:2。对TIP-A 抗氧化活性研究表明,其对羟自由基(·OH)、超氧阴离子自由基(O2·)、1- 二苯基-2- 三硝基苯肼(DPPH)自由基有较强的清除能力,半抑制质量浓度(IC50 值)分别为1.06、1.02、1.13mg/mL。对过氧化氢(300mmol/L)诱导的PC12 细胞损伤有较好的抑制力,具备开发成天然抗氧化剂的潜力。

关键词: 印度块菌, 多糖, 单糖组成, 抗氧化活性

Abstract:

A water-soluble crude polysaccharide was extracted from Truffle (Tuber indicum) by water extraction and alcohol precipitation and then purified by DEAE 52 cellulose and Sephadex G-100 chromatographic column to obtain a major fraction of polysaccharide (TIP-A). The relative molecular weight (Mr) of TIP-A was determined to be 17500 by high performance gel permeation chromatography (HPGPC). In addition, gas chromatography-mass spectrometry (GC-MS) analysis exhibited that TIP-A was a homogeneous heteropolysaccharide consisted of mannose, glucose, galactose and rhamannose with a molar ratio of 7:2:2:2. TIP-A had strong scavenging activity on hydroxyl, superoxide anion, and 1-diphenyl-2-picryldydrazyl (DPPH) free radicals and IC50 values of TIP-A for three kinds of free radicals were 1.06, 1.02 mg/mL and 1.13 mg/mL, respectively. TIP-A could also significantly attenuate PC12 cell damage caused by hydrogen peroxide at the concentration of 300 mmol/L.

Key words: Tuber indicum, polysaccharide, monosaccharide composition, antioxidant activity

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