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<dc:title xml:lang="fr">Complexes ADN/polycation en solution et aux interfaces en tant que vecteurs de transfection non viraux de pointe</dc:title>
<dcterms:alternative xml:lang="en">DNA/polycation complexes in bulk and at interfaces as advanced non-viral transfection vectors</dcterms:alternative>
<dc:subject xml:lang="fr">Complexes de polyelectrolytes</dc:subject>
<dc:subject xml:lang="fr">Interactions cellules-materiaux</dc:subject>
<dc:subject xml:lang="fr">Films minces</dc:subject>
<dc:subject xml:lang="fr">Assemblage couche-par-couche</dc:subject>
<dc:subject xml:lang="fr">Transfection</dc:subject>
<dc:subject xml:lang="fr">Adsorption des proteins</dc:subject>
<dc:subject xml:lang="fr">Adhesion cellulaire</dc:subject>
<dc:subject xml:lang="fr">Lignée cellulaire humaine primaire</dc:subject>
<dc:subject xml:lang="en">Polyelectrolyte complexes</dc:subject>
<dc:subject xml:lang="en">Cell-surface interactions</dc:subject>
<dc:subject xml:lang="en">Thin films</dc:subject>
<dc:subject xml:lang="en">Layer-by-layer assembly</dc:subject>
<dc:subject xml:lang="en">Transfection</dc:subject>
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<tef:elementdEntree autoriteExterne="031122043" autoriteSource="Sudoc">Cellules -- Adhésivité</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="029632986" autoriteSource="Sudoc">Couches de Langmuir-Blodgett</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Ma thèse a porté sur des complexes de polyélectrolytes en solution et en films LbL pour la transfection de cellules et le contrôle des interactions cellule-surface. Il est possible de doser un agent de transfection et de l'ADN plasmidique dans des films LbL en ajustant le nombre de couches. Les efficacités de transfection avec différentes lignées cellulaires ont été au moins aussi bonnes que celles rapportées dans la littérature, mais sont restées globalement faibles. Différents nanobags ont également été systématiquement testés menant à un protocole de transfection très efficace avec une faible cytotoxicité pour des fibroblastes humains qui sont difficiles à transfecter. Nous avons pu identifier les architectures LbL qui permettent de contrôler l'adhésion cellulaire même en présence de sérum. Cela nous a permis d'introduire une nouvelle technique pour le suivi in situ de la transfection par QCM-D en suivant la mobilité du cytosquelette qui sera poursuivie dans un futur projet.</dcterms:abstract>
<dcterms:abstract xml:lang="en">My PhD work was focused on polyelectrolyte complexes in bulk and in LbL-films for cell transfection and for controlling cell-surface interactions. It is possible to dose transfection agent and plasmid DNA in LbL-films by adjusting the number of layers. Transfection efficiencies with different cell lines were at least as good as reported in the literature, but remained overall weak. Different nanobags were also tested systematically leading to a highly efficient transfection protocol with low cytotoxicity for human fibroblasts which are difficult to transfect. We were able to identify multilayer architectures that allow to control cell adhesion even in the presence of serum. This allowed us also to introduce a new technique for the in-situ monitoring of transfection by QCM-D through monitoring cytoskeleton mobility which will be further pursued in a future research project.</dcterms:abstract>
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