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<dc:title xml:lang="fr">Régénération pulpaire guidée par un caillot sanguin et un cône électrofilé : chimiotaxie des cellules souches du ligament alvéolodentaire</dc:title>
<dcterms:alternative xml:lang="en">Pulp regeneration guided by a blood clot and an electrospun cone : chemotaxis of periodontal ligament stem cells</dcterms:alternative>
<dc:subject xml:lang="fr">Régénération tissulaire guidée</dc:subject>
<dc:subject xml:lang="fr">Matériaux biocompatibles</dc:subject>
<dc:subject xml:lang="fr">Coagulation sanguine</dc:subject>
<dc:subject xml:lang="fr">Sérum</dc:subject>
<dc:subject xml:lang="fr">Cellules souches mésenchymateuses</dc:subject>
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<dc:subject xml:lang="fr">Facteur de croissance dérivé des plaquettes</dc:subject>
<dc:subject xml:lang="en">Guided tissue regeneration</dc:subject>
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<dc:subject xml:lang="en">Mesenchymal stem cells</dc:subject>
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<tef:elementdEntree autoriteExterne="027289982" autoriteSource="Sudoc">Matériaux dentaires</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">La régénération pulpaire est une technique de traitement des dents nécrosées immatures qui pour le moment n’est pas développée pour les dents matures malgré un potentiel important. L’objectif de cette recherche est d’établir un protocole de régénération pulpaire permettant de restaurer un tissu fonctionnel et vascularisé sur dent nécrosée mature. Dans ce cadre, le rôle du caillot sanguin a été évalué en tant qu’activateur des cellules souches du ligament parodontal (PDLSCs). Le sérum libéré contient des facteurs capables d’induire une chimiotaxie à longue distance des PDLSCs, mécanisme médié principalement par le PDGF-BB. Par ailleurs, il a été démontré que l’angiogenèse induite par les PDLSCs, dans des modèles tridimensionnels, dépendait de l’équilibre PDGF-BB/VEGF-A et de leurs interactions avec les cellules endothéliales. Ces deux mécanismes, chimiotaxie et angiogenèse, peuvent être soutenus dans le canal dentaire par un matériau de porosité adaptée en présence d’un caillot sanguin. Le matériau testé in vivo, un cône électrofilé, permet d’assurer la colonisation cellulaire et l’établissement d’un réseau vasculaire stable.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Pulp regeneration is a technique for treating immature necrotic teeth that, despite its significant potential, has not yet been developed for mature teeth. This research aims to establish a pulp regeneration protocol that will restore functional, vascularized tissue to mature necrotic teeth. In this context, the role of blood clots as activators of periodontal ligament stem cells (PDLSCs) has been evaluated. The released serum contains factors able to induce long-distance chemotaxis of PDLSCs, a mechanism mainly mediated by PDGF-BB. Furthermore, it has been shownthat PDLSC-induced angiogenesis in three-dimensional models depends on the PDGF-BB/VEGF-A balance and their interactions with endothelial cells. These two mechanisms, chemotaxis and angiogenesis, can be supported in the dental canal by a material with suitable porosity in the presence of a blood clot. The material tested in vivo, an electrospun cone, ensures cell colonization and the establishment of a stable vascular network.</dcterms:abstract>
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