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Preparations of Ethosome-like Catanionic Vesicles from Ion-Pair Amphiphiles( IPAs ) for Dermal Drug Delivery

Published online by Cambridge University Press:  26 June 2014

Yu-Min Yang
Yu-Min Yang*
Affiliation:
Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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Abstract

Ethosomes which are phospholipid vesicular systems embodying ethanol in relatively high concentrations have ever been discovered for enhanced skin delivery of drugs. The development of competent ethosome-like catanionic vesicles for dermal drug delivery is demonstrated in this work. Double-chained ion-pair-amphiphiles (IPAs or catanionic surfactants) were prepared from single-chained cationic and anionic surfactants by the precipitation method. These lipid-like surfactants were thereafter used as the material to prepare the catanionic vesicles with the aid of ethanol as the cosolvent in aqueous buffer solution by a simple semispontaneous process. Formability and physical stability of the as-prepared ethosome-like catanionic vesicles were discussed based on the viewpoint of mixed solvent dielectric constant. The potential application of the ethosome-like catanionic vesicles as nano-carriers in dermal drug delivery was illustrated by the encapsulation of hydrophobic and hydrophilic drugs. Furthermore, effects of ethanol and cholesterol addition on physical stability, bilayer membrane rigidity, encapsulation efficiency, and release rate of the ethosome-like catanionic vesicles were systematically studied. The performance of ethosome-like catanionic vesicles as drug delivery nano-carriers, eventually, can be tailored by the concentrations of ethanol and. cholesterol. The results of gelation of drugs loaded ethosome-like catanionic vesicles by water soluble polymers with and without hydrophobical modifications, as revealed by the phase maps and the rheological properties, then provide useful information for practical use of the ethosome-like catanionic vesicles in dermal delivery of drugs.

Keywords

colloidself-assemblysurface chemistry
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1685: Symposium U – Soft Nanomaterials , 2014 , mrss14-1685-u03-38
Copyright
Copyright © Materials Research Society 2014 

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