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<dc:title xml:lang="fr">Carbon dots : synthèse pour des études toxicologiques et développement d’outils théranostiques</dc:title>
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<dc:subject xml:lang="fr">Délivrance de gènes</dc:subject>
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<dcterms:abstract xml:lang="fr">La récente découverte des carbon dots (CDs) et de leurs propriétés physico-chimiques exceptionnelles (stabilité chimique, solubilité en milieu aqueux, faible toxicité, biocompatibilité, photoluminescescence et résistance au photoblanchiment) permet d’envisager l’utilisation de ces matériaux carbonés de taille nanométrique dans de nouvelles approches en imagerie biomédicale (fluorescence, IRM...), pour la vectorisation d’acides nucléiques (ADN, siARN) et la délivrance d’actifs thérapeutiques. Dans ce contexte, les objectifs de ce travail de thèse s’articulent autour de deux thématiques bien précises : échantillonnage de nanoparticules carbonées et développement de plateformes théranostiques. Une première partie a ainsi été consacrée à la préparation de carbon dots diversement fonctionnalisés de façon à pouvoir explorer l’espace structural et mener des études de relation structure-toxicité sur différentes lignées de cellules en culture. La seconde partie a été centrée sur l’élaboration d’une plateforme théranostique à base de carbon dots visant, d’une part, à délivrer un acide nucléique de façon intracellulaire et, d’autre part, à permettre un suivi des particules par différentes techniques d’imagerie.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The recent discovery of carbon dots (CDs) and their very interesting phsico-chemical properties (chemical stability, water solubility, low toxicity, biocompatibility, photoluminescence and resistance to photobleaching) make these carbon nanoparticles a powerfull platform for biomedical imaging (fluorescence, MRI...), nucleic acids vectorization (DNA, siRNA) and drug delivery. In this context, the objectives of the thesis work are divided into two different thematics: carbon nanoparticles sampling and development of theranostic platforms. The first part is devoted to the preparation of various functionalized carbon dots to explore the structural space and to manage structure-toxicity relationship studies on different cell lines. The second part is focused on the development of a theranostic platform based on carbon dots in order to promote simultaneously nucleic acids delivery into cells and to monitor them by different imaging techniques.</dcterms:abstract>
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