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Synthesis of two multivalent lactosides with anti-adhesive activity and their fluorescein-labeled and biotin-labeled derivatives

Qing Li, Yue-Tao Zhao, Xiang-Bao Meng, Ting-Ting Yan, Shu-Chun Li, He-Qing Huang, Zhi-Hui Zhao*, Zhong-Jun Li*   

  1. 1. State Key Laboratory of Natural and Biomimetic Drugs; Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
    2. Jiangsu Province Key Laboratory for Molecular and Medical Biotechnology, College of Life Science, Nanjing Normal University, Nanjing 210046, China
  • Received:2011-03-16 Revised:2011-05-20 Online:2011-07-01 Published:2011-07-01
  • Contact: Zhi-Hui Zhao*, Zhong-Jun Li*

Abstract:

Adhesion of leukocytes to endothelium plays an important role in inflammation-associated diseases. Our previous studies showed that multivalent lactosides were able to inhibit this process. Using 2-azide-1,3-propandiol and glutamic acid as spacers, we synthesized divalent lactoside An-2 and tetravalent lactoside Gu-4 by means of convergent method. These two compounds displayed high anti-adhesive activity and showed therapeutic effect in rats with severe burn shock. In addition, investigation of the anti-adhesion biological mechanism using labeled compounds YAn-2 and YGu-4 demonstrated that the target of multivalent lactosides was CD11b, the β2 integrin subunit, on the surface of leukocytes. In this paper, the synthesis of these two new multivalent lactosides as well as their fluorescein-labeled and biotin-labeled compounds is reported.

Key words: Anti-adhesion, Biotin, Fluorescein, Multivalent-lactosides, Synthesis

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