1. Liposomes as Alternative Vehicles for Sun Filter Formulations
- Author
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Luisa Coderch, Jaime Notario, Cristina Alonso, O. López, J.L. Parra, E. Ramón, and A. de la Maza
- Subjects
Drug Carriers ,Liposome ,Structural organization ,Chromatography ,integumentary system ,Swine ,Chemistry ,Chemistry, Pharmaceutical ,Lipid composition ,Genetic Vectors ,Pharmaceutical Science ,General Medicine ,In Vitro Techniques ,Saturated phosphatidylcholine ,medicine.anatomical_structure ,In vivo ,Skin penetration ,Liposomes ,Percutaneous absorption ,Stratum corneum ,medicine ,Animals ,Sunscreening Agents ,Skin - Abstract
The aim of our study was to determine the influence of several types of liposomes with a different lipid composition on the percutaneous absorption of one conventional sun filter with a lipophilic character (ethyl hexyl methoxycinnamate) using both in vitro and in vivo methodologies. Three different liposomes were prepared with unsaturated and saturated phosphatidylcholine (PC, HPC), and with a wool lipid mixture (IWL) with a composition similar to that of the stratum corneum lipids. Results showed that the liquid crystalline state associated with PC liposomes plays a key role in enhancing skin penetration. when liposomes with a composition and structural organization similar to that of the stratum corneum lipids (HPC and IWL) are used, the skin penetration is retarded, suggesting a certain reinforcement of the stratum corneum barrier. These two types of liposomes could be regarded as alternatives to conventional oil/water emulsions in the formulations of lipidic sun filters. Finally, an acceptable correlation was obtained using both in vitro and in vivo methodologies to evaluate the corresponding skin absorption profile.
- Published
- 2005