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Anti-tumor efficiency of NGR-modified PEG-PLGA micelles containing paclitaxel: in vitro and in vivo

Bing-Xiang Zhao, Yue Huang, Li-Min Luo, Xin Zhao, Xin Wang, Su Chen, Ke-Fu Yu, Xuan Zhang*, Qiang Zhang   

  1. 1. State Key Laboratories of Natural and Biomimetic Drugs; Peking University Health Science Center, Beijing 100191, China
    2. Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
  • Received:2011-08-07 Revised:2011-11-01 Online:2012-01-01 Published:2012-01-01
  • Contact: Xuan Zhang*

Abstract: In the present study, we prepared novel NGR-modified PEG-PLGA polymeric micelles containing paclitaxel (NGR-PM-PTX) in order to evaluate their potential targeting to aminopeptidase N receptors expressed on tumor endothelial cells and the tumor cell surface and its anti-tumor activity in vitro and in vivo. NGR-PM-PTX was prepared by thin-film hydration method. The in vitro targeting characteristics of NGR-modified PM on HUVEC (human umbilical vein endothelial cells), HT1080 (human fibrosarcoma cells) and MCF-7 (human breast adenocarcinoma cells) were then investigated. The anti-tumor activity of NGR-PM-PTX was evaluated in HT1080 tumor-bearing mice in vivo. The targeting activity of the NGR-modified PM was demonstrated by flow cytometry and confocal microscopy in vitro. NGR-PM-PTX also produced marked anti-tumor activity to HT1080 tumor-bearing mice in vivo.

Key words: Aminopeptidase N, Asn-Gly-Arg, Paclitaxel, Targeting, Polymeric micelles

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