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<dc:title xml:lang="fr">Photothérapies combinées à base de matériaux 2D multifonctionnels pour le traitement du cancer et de maladies auto-immunes</dc:title>
<dcterms:alternative xml:lang="en">Combined phototherapies based on multifunctional 2D materials for the treatment of cancer and autoimmune diseases</dcterms:alternative>
<dc:subject xml:lang="fr">Oxyde de graphène</dc:subject>
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<dc:subject xml:lang="fr">Multifonctionnalisation</dc:subject>
<dc:subject xml:lang="fr">Photothérapie</dc:subject>
<dc:subject xml:lang="fr">Cancer</dc:subject>
<dc:subject xml:lang="fr">Polyarthrite rhumatoïde</dc:subject>
<dc:subject xml:lang="en">Graphene oxide</dc:subject>
<dc:subject xml:lang="en">MoS2</dc:subject>
<dc:subject xml:lang="en">Multi-functionalization</dc:subject>
<dc:subject xml:lang="en">Phototherapy</dc:subject>
<dc:subject xml:lang="en">Cancer</dc:subject>
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<tef:elementdEntree autoriteExterne="23354755X" autoriteSource="Sudoc">Oxyde de graphène</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les matériaux 2D, y compris l'oxyde de graphène et le MoS2, sont des plates-formes idéales pour l'administration de médicaments et la photothérapie. Cette thèse vise à étudier l'application de ces matériaux dans le traitement du cancer et de la polyarthrite rhumatoïde combinant thérapie photothermique et photodynamique.Nous avons d'abord exploré la modification covalente du GO ciblant différents groupements fonctionnels. Les époxydes ont été modifiés par addition nucléophile avec des fonctionnalités contenant des amines ou des thiols. Les groupes hydroxyles ont ensuite été modifiés par carboxylation ou par addition de Michael médiée par la benzoquinone. Cet approche a été suivie par la fixation d’un second groupement fonctionnel par amidation de l'acide carboxylique ou par addition de Michael sur la benzoquinone.Pendant ce temps, nous avons préparé l'oxyde de graphène doublement fonctionnalisé avec un dérivé d'acide folique et le photosensibilisateur chlorine e6 en vue de cibler les cellules cancéreuses du sein MCF-7 et les macrophages RAW 264.7 par photothérapie. Ce conjugué a montré une capacité cytotoxique efficace contre les MCF-7. La combinaison de la therapié photothermique et photodynamique a montré un effet synergique. Par contre, les cellules RAW 264.7 n’étaient sensible qu’à la thérapie photothermique.Enfin, nous avons développé la méthode de fonctionnalisation covalente de MoS2 avec une addition de Michael médiée par la benzoquinone. Ensuite, nous avons préparé des nanofeuillets MoS2 directement en utilisant une exfoliation en phase liquide assistée par benzoquinone.</dcterms:abstract>
<dcterms:abstract xml:lang="en">2D materials including graphene oxide and MoS2 are ideal platforms for drug delivery and phototherapy. This Thesis is aiming to investigate the application of these materials in the treatment of cancer and rheumatoid arthritis combining photothermal and photodynamic therapy.We first explored the covalent modification onto GO targeting different functional groups. The epoxide rings were derivatized through nucleophilic addition with functionalities containing amines or thiols. The hydroxyl groups were then modified via carboxylation or benzoquinone-mediated Michael addition followed by the attachment of a second functional group through amidation to carboxylic acid or through Michael addition to benzoquinone.Meanwhile, we prepared the folic acid and chlorin e6 double functional graphene oxide for the phototherapy targeting MCF-7 breast cancer cells and RAW 264.7 macrophages. The double functional graphene oxide showed high killing efficiency against MCF-7. Following a combination of photothermal and photodynamic strategies a synergistic effect was observed. RAW 264.7 cells were instead more sensitive only to the photothermal treatment. Finally, we developed the method to covalent functionalize MoS2 with benzoquinone-mediated Michael addition. In addition, we prepared MoS2 nanosheets directly using a benzoquinone-assisted liquid phase exfoliation.</dcterms:abstract>
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