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茶叶科学 ›› 2008, Vol. 28 ›› Issue (3): 166-171.doi: 10.13305/j.cnki.jts.2008.03.010

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茶多糖的化学修饰及体外抗凝血作用研究

梁进1, 张剑韵1, 崔莹莹1, 黄龙全2,*   

  1. 1. 安徽农业大学生命科学学院;
    2. 安徽农业大学茶与食品科技学院,安徽 合肥 230036
  • 收稿日期:2008-02-26 修回日期:2008-04-30 出版日期:2008-06-15 发布日期:2019-09-16
  • 通讯作者: *E-mail: lqhuang218@yahoo.com.cn
  • 作者简介:梁进(1979— ),男,安徽蒙城人,硕士研究生,从事茶叶生物化学研究。
  • 基金资助:
    安徽省教育厅自然科学重点科研项目(2005KJ393ZD)

Study on Chemical Modification and Anticoagulant Function in vitro of Tea Polysaccharides

LIANG Jin1, ZHANG Jian-yun1, CUI Ying-ying1, HUANG Long-quan2,*   

  1. 1. Life Science College of AnHui Agricultural University, Hefei 230036, China;
    2. Tea and Food Science College of AnHui Agricultural University, Hefei 230036, China
  • Received:2008-02-26 Revised:2008-04-30 Online:2008-06-15 Published:2019-09-16

摘要: 采用DEAE-52纤维素柱层析的方法,分离纯化乌龙茶中的多糖成分;选用硫酸化、乙酰化和羧甲基化分别对纯化后的茶多糖进行化学修饰,研究了其修饰前后的体外抗凝血作用。结果表示:茶多糖具有抗凝血作用,能显著延长人体血浆的APTT值,而对TT和PT值无明显影响。茶多糖经柱层析后分离出四个多糖组分,其中组分Ⅱ为茶多糖总量的57.36%,抗凝血活性也相对较强。茶多糖组分Ⅱ经硫酸化、乙酰化和羧甲基化修饰后,抗凝血活性进一步增强,化学修饰试剂与多糖的比例以及修饰反应时间在一定的范围内,影响茶多糖分子结构的变化程度,相应改变抗凝血活性。

关键词: 茶多糖, 化学修饰, 抗凝血

Abstract: The polysaccharides components of Olong tea were isolated and purified with DEAE-52 cellulose column chromatography. Sulfation, acetylation and carboxymethylation modification were separately selected to study on anticoagulant function in vitro of purified tea polysaccharides. The results showed that tea polysaccharides possess anticoagulant function, which could effectively prolonged APTT of human plasma, but had no obvious effect on PT and TT. Four polysaccharide components were separated by column, the component Ⅱ occupied 57.36% of total tea polysaccharides and it was relatively high anticoagulant activity. The anticoagulant function of tea polysaccharides component Ⅱ was further enhanced by sulfation,acetylation and carboxymethylation modification. The proportion between chemical modification reagents and polysaccharides, and modificating reaction time influenced on the modification degree of molecular structure of tea polysaccharides, and changed the anticoagulant activity accordingly.

Key words: tea polysaccharides, chemical modification, anticoagulant

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