Retinyl palmitate flexible polymeric nanocapsules: characterization and permeation studies
| Autor: | Zaine Teixeira, Giselle Z. Justo, Bruna Alice Gomes de Melo, Beatriz Zanchetta, Helena B. Nader, Luciana Lima de Oliveira, Maria Helena Andrade Santana, Silvia Stanisçuaski Guterres, Edgar J. Paredes-Gamero, Nelson Durán |
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| Rok vydání: | 2010 |
| Předmět: |
Retinyl Esters
Materials science Polymers Polyesters Skin Absorption Capsules Nanocapsules chemistry.chemical_compound Colloid and Surface Chemistry Dynamic light scattering Microscopy Electron Transmission Retinyl palmitate Polymer chemistry Humans Physical and Theoretical Chemistry Particle Size Vitamin A Chromatography High Pressure Liquid Skin chemistry.chemical_classification Drug Carriers Microscopy Confocal Surfaces and Interfaces General Medicine Polymer Vitamins Permeation Nile blue Elasticity Membrane chemistry Chemical engineering Transmission electron microscopy Diterpenes Biotechnology |
| Zdroj: | Colloids and surfaces. B, Biointerfaces. 81(1) |
| ISSN: | 1873-4367 |
| Popis: | Polymeric nanocapsules with elastic characteristics were prepared by the pre-formed polymer interfacial deposition method. The system consists of an oily core of retinyl palmitate with Span 60 and a polymeric wall of poly(D,L-lactide) (PLA). A narrow size distribution (215 nm, P.D.I. 0.10) was showed by dynamic light scattering (DLS) analyses. Particle deformability was observed by transmission electron microscopy (TEM) images and permeation of the particles through two superposed membranes of smaller pore diameters. Permeation studies were achieved using plastic surgery abdominal human skin by Franz diffusion cell. Retinyl palmitate permeates into deep skin layers. Besides, a PLA fluorescent derivative conjugated with Nile blue dye by an amide covalent bound was additionally obtained. Permeation profile of the nanocapsules with the fluorescent polymer was evaluated by confocal laser scanning microscopy (CLSM). The CLSM showed that nanocapsules were distributed uniformly, suggesting that the permeation mechanism through skin is intercellular. Thus, the use of these nanocapsules may be a feasible strategy to enhance the permeation of actives into the skin when delivery to deep layers is aimed. |
| Databáze: | OpenAIRE |
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