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<dc:title xml:lang="fr">Conception, développement et synthèse de ligands du TSPO dans le but de traiter les maladies neurodégénératives</dc:title>
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<dc:subject xml:lang="fr">TSPO</dc:subject>
<dc:subject xml:lang="fr">Neurostéroïdes</dc:subject>
<dc:subject xml:lang="fr">Neuroprotection</dc:subject>
<dc:subject xml:lang="fr">Prégnénolone</dc:subject>
<dc:subject xml:lang="fr">Alloprégnanolone</dc:subject>
<dc:subject xml:lang="fr">Alzheimer</dc:subject>
<dc:subject xml:lang="fr">Solubilité</dc:subject>
<dc:subject xml:lang="fr">Buchwald-Hartwig</dc:subject>
<dc:subject xml:lang="fr">3-amino-3</dc:subject>
<dc:subject xml:lang="fr">4-dihydroquinolin-2-ones</dc:subject>
<dc:subject xml:lang="fr">Imidazo[1,2-c]quinazolin-2-ones</dc:subject>
<dc:subject xml:lang="en">TSPO</dc:subject>
<dc:subject xml:lang="en">Neurosteroids</dc:subject>
<dc:subject xml:lang="en">Neuroprotection</dc:subject>
<dc:subject xml:lang="en">Pregnenolone</dc:subject>
<dc:subject xml:lang="en">Allopregnanolone</dc:subject>
<dc:subject xml:lang="en">Alzheimer</dc:subject>
<dc:subject xml:lang="en">Solubility,</dc:subject>
<dc:subject xml:lang="en">Buchwald-Hartwig</dc:subject>
<dc:subject xml:lang="en">3-amino-3</dc:subject>
<dc:subject xml:lang="en">4-dihydroquinolin-2-ones</dc:subject>
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<tef:elementdEntree autoriteExterne="089458028" autoriteSource="Sudoc">Prégnénolone</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="040840751" autoriteSource="Sudoc.FMesh">Maladies neurodégénératives</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les neurostéroïdes sont des composés endogènes qui peuvent moduler la transmission synaptique et avoir un effet neuroprotecteur dans les maladies neurodégénératives. Les systèmes régulant leur biosynthèse ne sont pas connus mais la première étape de celle-ci peut être régulée par la protéine TSPO. Cette protéine mitochondriale facilite le transport du cholestérol vers l’intérieur de la mitochondrie pour y être métabolisé en prégnénolone. Ce stéroïde est le précurseur principal de la biosynthèse des neurostéroïdes et l’utilisation in vitro de ligands du TSPO permet d’augmenter sa sécrétion. Dans ce travail de thèse, nous avons ainsi cherché à développer de nouvelles familles de ligands solubles du TSPO augmentant la sécrétion de prégnénolone. Le développement de ces nouvelles familles a nécessité la réalisation d’une méthodologie de synthèse faisant intervenir une réaction de cyclisation pallado-catalysée de type Buchwald-Hartwig. Une étude de solubilité des composés synthétisés a été effectuée expérimentalement, leur activité a été évaluée par des méthodes fonctionnelles et leur effet neuroprotecteur a été testé sur un modèle cellulaire de la maladie d’Alzheimer.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Neurosteroids are endogenous compounds which can alter the synaptic transmission and enhance neuroprotection in neurodegenerative diseases. The systems that regulates their biosynthesis are not described but its first step ca be regulated by the TSPO. This mitochondrial protein facilitates the transport of cholesterol to the mitochondrial matrix to be metabolized in pregnenolone. This steroid is the precursor of neurosteroid biosynthesis and in vitro use of TSPO ligands induces its secretion. For this project, we looked forward to develop new families of soluble TSPO ligands that can increase pregnenolone production. The access to 3-amino-3,4-dihydroquinolin-2-ones required the establishment of a synthesis methodology of a palladium-catalyzed cyclization following Buchwald-Hartwig amination. A solubility study of synthesized compound was performed, their activity was established based on functional assays and their neuroprotective effect was evaluated on a cellular model of Alzheimer disease.</dcterms:abstract>
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