Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (8): 1524.

• Articles • Previous Articles     Next Articles

The Interaction of Human Lipoprotein with Cholesterol Modified Dextran in Serum

CAO Ning-Ning1, YU Yao-Ting2, WANG Man-Yan2, WANG Lian-Yong2, CHEN Chang-Zhi2   

  1. 1. Chemistry and Engineering Department, Tianjin Science and Technology University, Tianjin 300191, China;
    2. Bioactive Materials Research Laboratory, Nankai University, Tianjin 300071, China
  • Received:2001-04-24 Online:2002-08-24 Published:2002-08-24

Abstract: The interaction of human low-density lipoprotein(LDL) and very-low-density lipoprotein(VLDL) with cholesterol modified dextran(CHD) in serum was studied by turbidity and high performance liquid chromatography(HPLC)method. The solution turbidity of VLDLreacting with CHDwas higher than that of LDLwith CHDand was influenced by the concentration of CHD, cholesterol content of CHDand molecular weight of CHD. The turbidity reached the maximum value when the concentration of CHDwas 0.3 mg/mLand cholesterol content was 4 cholesterol group/100 dextran glucose units. Ca 2+ had no influence on the interaction of VLDLand LDLwith CHD.The molecular weights of LDL CHDcomplex were monitored by HPLCwhich showed that CHDmolecules could associate multi molecules of LDLcorrelating with the results of turbidity experiments. The HPLCexperiments showed that when cholesterol substitution number was 4/100 glucose units, the interaction of LDLwith CHDreached the optimal condition and the complexation molecular weight increased with increasing dextran molecular weight. The experimental results show that CHDcan induce self-aggregation of LDLor VLDL.

Key words: Interaction, Low density lipoprotein, Very low-density lipoprotein, Cholesterol modified dextran

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