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Enhancement of transdermal delivery of docetaxel by surfactant-ethanolic liposomes

Yu-Qin Qiu, Shuang Li, Fang Li, Suo-Hui Zhang, Yun-Hua Gao*

  

  1. 1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-12-24 Revised:2011-05-10 Online:2011-09-20 Published:2011-09-20
  • Contact: Yun-Hua Gao*

Abstract: One major problem encountered in transdermal drug delivery is the low permeability of drugs through the skin barrier. In the present study, we developed a surfactant-ethanolic liposomal system to improve the transdermal delivery of docetaxel (DTX), a model drug for high molecular weight and poorly water-soluble drugs. Surfactant-ethanolic liposomes (SEL) were composed of phospholipids, ethanol, sodium cholate, DTX and PBS which were prepared by thin film dispersion method. The developed formulations were characterized by determining the vesicle shape and surface morphology, size and size distribution, entrapment efficiency and drug loading capacity. The effects of the developed formulations on the permeation of DTX across rat skin in vitro were investigated using the modified Franz diffusion cell under both occlusive and non-occlusive application conditions. The DTX SELs with optimum composition (phospholipid–surfactant, 85:15, w/w) provided a significantly higher steady-state amount of flux and cumulative permeation, compared to the tranditional liposomes, surfactant liposomes and ethanolic liposomes. The optimal SELs exhibited stable vesicle size, morphology and drug loading capacity. Our results indicated that SELs were promising carriers to enhance the transdermal delivery of DTX.

Key words: Surfactant-ethanolic liposomes, Transdermal delivery, Docetaxel, Permeation study

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