食品科学 ›› 2010, Vol. 31 ›› Issue (6): 131-136.doi: 10.7506/spkx1002-6630-201006029

• 工艺技术 • 上一篇    下一篇

仙人掌多糖提取纯化及其抗凝血活性研究

蔡为荣1,顾小红2,3,汤 坚2,3,*   

  1. 1.安徽工程科技学院生化工程系 2.江南大学 食品科学与技术国家重点实验室 3.江南大学测试中心
  • 收稿日期:2009-09-15 修回日期:2009-12-24 出版日期:2010-03-15 发布日期:2010-12-29
  • 通讯作者: 汤 坚 E-mail:guxh@sytu.edu.cn
  • 基金资助:

    教育部国际合作项目(教外司美2008103)

Extraction, Purification and Anticoagulant Activity of Polysaccharides from Opuntia milpa alta

CAI Wei-rong1,GU Xiao-hong2,3,TANG Jian2,3,*   

  1. CAI Wei-rong1,GU Xiao-hong2,3,TANG Jian2,3,*
  • Received:2009-09-15 Revised:2009-12-24 Online:2010-03-15 Published:2010-12-29
  • Contact: TANG Jian E-mail:guxh@sytu.edu.cn

摘要:

对仙人掌多糖的提取、纯化及其抗凝血活性进行研究,并采用响应面分析法对提取工艺进行优化。结果表明:曲面回归方程拟合性好;优化工艺为提取温度75℃、提取时间3.63h,液料比3.42:1(mL/g),提取2 次,粗多糖得率为0.655%(湿基);粗多糖经阴离子琼脂糖离子交换层析和凝胶层析分离纯化共得到3 个多糖组分WSP1、WSP2a 和WSP3,重均分子量分别为2.32 × 106、1.24 × 106 和7.92 × 106。对氨基苯甲酸(PMP)衍生化高效液相色谱法检测表明:WSP1 主要成分为半乳糖;WSP2a 由鼠李糖、阿拉伯糖、木糖、甘露糖、葡萄糖、半乳糖、葡萄糖醛酸和半乳糖醛酸组成,含量(质量分数)分别为6.3%、32.3%、12.9%、1.5%、4.8%、37.1%、0.7%、4.4%;WSP3 成分主要有阿拉伯糖、半乳糖和木糖以及少量鼠李糖、甘露糖、糖醛酸。纤维蛋白原转化纤维蛋白的抑制实验初步表明,仙人掌多糖组分WSP2a 和WSP3 具有抗凝血活性。

关键词: 米邦塔仙人掌, 多糖, 提取, 纯化, 抗凝血

Abstract:

Opuntia milpa alta was used as raw material to extract active polysaccharaides by hot water extraction. Extracted Opuntia milpa alta polysaccharaides were purified/fractionated by DEAE-Sepharose CL-6B and Sepharose CL-6B chromatography to obtain fractions WSP1 and WSP3 and subfraction from fraction WSP2 WSP2a. Response surface analysis based on central composite design was employed to examine effects of extraction temperature and time and liquid/material ratio on Opuntia milpa alta polysaccharaide extraction. Besides, WSP1, WSP3 and WSP2a were analyzed for monosaccharide composition and anticoagulant activity. Results showed that two-time extraction for 3.63 h each time at 75 ℃ and a liquid/material ratio of 3.42 mL/g gave an optimal crude Opuntia milpa alta polysaccharaide yield, reaching up to 0.655% (calculated on the basis of wet weight). WSP1, WSP3 and WSP2a exhibited weight average molecular weights of 2.32×106, 1.24 ×106 and 7.92×106, respectively. The predominant monosaccharide in WSP1 was galactose. WSP2a consisted of 6.3% of rhamnose, 32.3% of arabinose, 12.9% of xylose, 1.5% of mannose, 4.8% of glucose, 37.1% of galactose, 0.7% of glucuronic acid and 4.4% of galacturonic acid. The monosaccharide composition of WSP3 mainly consisted of arabinose, xylose, rhamnose and trace of glucose, mannose and uronic acid. WSP2a and WSP3 showed obvious anticoagulant activity.

Key words: Opuntia milpa alta, polysaccharide, extraction, purification, anticoagulation

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