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<dc:title xml:lang="fr">Hétérogénéité et plasticité de l’intégrine α5 dans les cellules souches de glioblastome</dc:title>
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<dc:subject xml:lang="fr">Hétérogénéité</dc:subject>
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<dcterms:abstract xml:lang="fr">Les glioblastomes (GBM) sont les tumeurs les plus fréquentes et les plus agressives du système nerveux central. Depuis 2005, le protocole Stupp est suivi pour le traitement du GBM (chirurgie, radiothérapie/chimiothérapie). Malgré ce lourd traitement, les patients récidivent. L’hétérogénéité moléculaire intra- et inter-tumorale du GBM ainsi que la présence de cellules souches cancéreuses (CSC) sont en partie responsables des échecs thérapeutiques. Le microenvironnement module les caractéristiques des CSC, entrainant une plasticité. Ce projet porte sur l'étude d'une cible thérapeutique, l'intégrine α5β1, dont l'expression est associée à une résistance thérapeutique et à un mauvais pronostic. Il vise à caractériser la plasticité des CSC et particulièrement l'impact de l’hypoxie et du traitement sur l'expression de l'intégrine α5 dans des modèles in vitro et in vivo. L'étude de l'influence de cette expression sur le phénotype tumoral confirmera son intérêt comme cible thérapeutique pour des populations spécifiques et permettra de proposer des alternatives thérapeutiques pour une médecine personnalisée.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Glioblastomas (GBM) are the most frequent and aggressive tumors of the central nervous system. Since 2005, the Stupp protocol has been followed for the treatment of GBM (surgery, radiotherapy/chemotherapy). Despite this heavy treatment, patients recur. The intra- and inter-tumoral molecular heterogeneity of GBM as well as the presence of cancer stem cells (CSC) are partly responsible for the therapeutic failures. The microenvironment modulates the characteristics of CSCs, leading to plasticity. This project focuses on the study of a therapeutic target, integrin α5β1, whose expression is associated with therapeutic resistance and poor prognosis. It aims to characterize the plasticity of CSCs and particularly the impact of hypoxia and treatment on α5 integrin expression in in vitro and in vivo models. The study of the influence of this expression on the tumor phenotype will confirm its interest as a therapeutic target for specific populations and will allow to propose therapeutic alternatives for a personalized medicine.</dcterms:abstract>
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