波谱学杂志

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  应用脉冲梯度场NMR研究脂蛋白的自扩散系数分布

崔艳芳1,2,文健3,刘买利1*   

  1.  1.中国科学院武汉物理与数学研究所,波谱与原子分子物理国家重点实验室,湖北武汉 430071;2.华中师范大学化学系,湖北武汉 430079;3.武汉大学药学院, 湖北武汉 430071
  • 收稿日期:2002-02-06 修回日期:2002-11-15 出版日期:2003-03-05 发布日期:2003-03-05
  • 作者简介:*通讯联系人:电话:027-87197305,传真:027-87199291,E-mail:ml.liu@wipm.ac.cn
  • 基金资助:

    国家自然科学基金资助项目(29925515).

 STUDY OF DIFFUSION COEFFICIENT DISTRIBUTION OFLIPOPROTEINS BY PULSE-FIELD-GRADIENT (PFG)-NMR

CUI Yan-fang1,2, WEN Jian3, LIU Mai-li1*
  

  1. 1.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China; 2.Department of Chemistry, Central China Normal University, Wuhan 430079, China; 3.Institute of Pharmacology, Wuhan University, Wuhan 430071, China
  • Received:2002-02-06 Revised:2002-11-15 Online:2003-03-05 Published:2003-03-05
  • About author:*Correspondence author: Tel:027-8719-7305, Fax:027-8719-9291,E-mail:ml.liu@wipm.ac.cn
  • Supported by:

    国家自然科学基金资助项目(29925515).

摘要:

应用脉冲梯度场(PFG)-NMR对胆固醇定值血清中的低密度脂蛋白,高密度脂蛋白及两者不同配比下的混合物的自扩散系数进行了分析. 并结合脂蛋白分子颗粒的构成探讨了脂蛋白的自扩散系数分布,认为此种胆固醇定值血清脂蛋白样品具有分散体系的特点,自扩散系数呈连续分布.

关键词: 核磁共振, 自扩散系数, 脂蛋白, 分布函数, 脉冲梯度场

Abstract:

Qualitative and quantitative analysis of major fractions of lipoproteins such as LDL, VLDL and HDL, has great values in many biomedical applications, for instance, in the diagnosis of liver diseases, heart diseases and cancer, and in diet management. A method of using a continuous distribution model of diffusion coefficient to characterize lipoproteins was developed in this study. Commercial samples of HDL, LDL and their mixtures at HDL∶LDL ratios of 2∶1 and 1∶1 were used to test the validity of this approach. The results showed that, with the samples studied, the continuous distribution model of diffusion coefficient resulted in good fitting to experimental data.

Key words: NMR, diffusion coefficient, lipoprotein, distribution function, pulse-field-gradient

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