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<dc:title xml:lang="fr">Élaboration et caractérisation de matériaux nanofibreux fonctionnels à base d’acide hyaluronique et de nanoparticules lipidiques pour des applications à usage biomédical</dc:title>
<dcterms:alternative xml:lang="en">Development and characterization of functional nanofibers based on hyaluronic acid and lipid nanoparticles for biomedical applications</dcterms:alternative>
<dc:subject xml:lang="fr">Nanofibres</dc:subject>
<dc:subject xml:lang="fr">Acide hyaluronique</dc:subject>
<dc:subject xml:lang="fr">Electrospinning</dc:subject>
<dc:subject xml:lang="fr">Pansement</dc:subject>
<dc:subject xml:lang="fr">Cyclodextrine</dc:subject>
<dc:subject xml:lang="fr">Nanoparticules lipidiques</dc:subject>
<dc:subject xml:lang="en">Nanofibers</dc:subject>
<dc:subject xml:lang="en">Hyaluronic acid</dc:subject>
<dc:subject xml:lang="en">Electrospinning</dc:subject>
<dc:subject xml:lang="en">Wound dressing</dc:subject>
<dc:subject xml:lang="en">Cyclodextrin</dc:subject>
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<dcterms:abstract xml:lang="fr">L’acide hyaluronique (HA) est un polysaccharide dont les propriétés de biocompatibilité et de bioactivité en font un composé très intéressant pour l’élaboration de pansements. Dans ce travail, des stratégies d’élaboration de membranes biomimétiques nanofibreux à base d’HA, ont été développées par electrospinning en utilisant l’eau pure comme solvant afin de s’affranchir de tout problème de toxicité. Pour cela, de l’alcool polyvinylique ainsi que de l’hydroxypropyl-β-cyclodextrine ont été ajoutés pour former des membranes uniformes. Un procédé de réticulation in situ de ces matériaux a également été proposé afin d’assurer la tenue de la structure fibreuse lors de son utilisation en tant que pansement. Pour ouvrir les champs d’application, différentes voies de fonctionnalisation de ces matériaux ont été envisagées. La première, a consisté en l’imprégnation directe de naproxène, une molécule modèle aux propriétés anti-inflammatoires, dans les membranes par immersion dans une solution aqueuse ou par CO2 supercritique. La seconde voie a reposé sur l’incorporation, au sein des fibres, de nanoparticules lipidiques pouvant elles-mêmes encapsuler et délivrer des principes actifs.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Hyaluronic acid (HA) is a polysaccharide for which biocompatibility and bioactivity properties make it a very interesting compound as wound dressings. In this work, biocompatible insoluble HA-based nanofibrous dressings were designed by electrospinning in pure water in order to overcome any toxicity issues. To this purpose, poly(vinyl alcohol) and hydroxypropyl-β-cyclodextrin were added to form uniform nanofibrous scaffolds. An in situ crosslinking process of the scaffolds is also investigated to ensure the stability of the fibrous structure during the use of the dressing. For opening the scope of wound application, various pathways of functionalization of these materials have been envisaged. The first one was the direct impregnation of naproxen, a model drug with anti-inflammatory properties, into the scaffolds either in aqueous solution or under supercritical CO2. The second way is based on the incorporation, within nanofibers, of lipid nanoparticles in which drugs can be encapsulated and then delivered to its wound sites.</dcterms:abstract>
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