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<dc:title xml:lang="fr">Développement de stratégies de régénération parodontale basées sur le contrôle et la résolution de l'inflammation : études in vivo et in vitro</dc:title>
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<dc:subject xml:lang="fr">Régénération parodontale</dc:subject>
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<dcterms:abstract xml:lang="fr">La régénération parodontale ne peut se concevoir qu’avec un bon contrôle de l’inflammation et de l’infection du parodonte. Notre travail de thèse porte sur l’étude de molécules ayant démontré un impact sur la modulation ou la résolution de l’inflammation. Dans un premier temps, notre revue de la littérature a mis en lumière les caractéristiques anti-inflammatoire, immunomodulatrice et pro-ostéogène des statines. Puis nous avons développé, caractérisé et testé un hydrogel à base de chitosan contenant des nanoémulsions d’atorvastatine et de lovastatine. In vitro nos nanoémulsions de statine ont contré la réponse inflammatoire induite par Porphyromonas gingivalis dans les cellules épithéliales et fibroblastes oraux et promu la réponse pro-ostéogène des ostéoblastes. In vivo, l’hydrogel fonctionnalisé aux statines a accéléré la cicatrisation osseuse sur un modèle de défaut calvarial murin. En parallèle, notre équipe s’est intéressée à l’étude du M101, un transporteur d’oxygène ayant des propriétés anti-inflammatoires, anti-bactériennes et anti-oxydantes. In vivo, un hydrogel contenant du M101 a été à l’origine d’une accélération de la néoformation osseuse dans un modèle de défaut critique de calvaria.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Periodontal regeneration can only be achieved with good control of inflammation and infection of the periodontium. Our thesis work focuses on the study of molecules that have demonstrated an effect on the modulation or resolution of inflammation. Firstly, our review of the literature shed light on the anti-inflammatory, immunomodulatory and pro-osteogenic characteristics of statins. We then developed, characterized and tested a chitosan-based hydrogel containing atorvastatin and lovastatin nanoemulsions. In vitro, our statin nanoemulsions countered the inflammatory response induced by Porphyromonas gingivalis in epithelial cells and oral fibroblasts and promoted the pro-osteogenic response of osteoblasts. In vivo, the statin-functionalized hydrogel improved bone healing in a murine calvarial defect model. At the same time, our team was interested in the study of M101, an oxygen transporter with anti-inflammatory, anti-bacterial and anti-oxidant properties. In vivo, a hydrogel containing M101 accelerated new bone formation in a critical defect model of calvaria.</dcterms:abstract>
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