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<dc:title xml:lang="fr">Contribution à l'étude chimique et pharmacochimique de dérivés mono- bi- et tricycliques de pyridazines</dc:title>
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<dc:subject xml:lang="fr">Protéine kinase DYRK1A</dc:subject>
<dc:subject xml:lang="fr">Relations structure-activité</dc:subject>
<dc:subject xml:lang="fr">Pyridazines</dc:subject>
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<dc:subject xml:lang="fr">Criblage in silico</dc:subject>
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<dcterms:abstract xml:lang="fr">La protéine kinase DYRK1A fait partie du groupe des CMGC kinases et est impliquée dans divers processus neurodégénératifs tels que la maladie d’Alzheimer.Dans ce cadre, une étude topologique a été menée autour d’un hit imidazo[1,2-B]pyridazine identifié par un criblage biologique. Ce composé a servi à concevoir des inhibiteurs ATP-Compétitifs de DYRK1A par l’utilisation de méthodes métallo-Catalysées (Pd, Cu) pour introduire divers fragments fonctionnalisés.Sur les soixante dérivés imidazo[1,2-X]azine synthétisés, sept composés ont montré une affinité nanomolaire pour DYRK1A (IC50 = 41-130 nM). En parallèle de ce travail de pharmacochimie, le développement de nouvelles méthodologies de synthèse a visé à la polysubstitution régiosélective du cycle pyridazine.En dernier lieu, nous avons donné les éléments et concepts permettant la construction de chimiothèques virtuelles dérivées de pyridazines et destinées à être criblées in silico.</dcterms:abstract>
<dcterms:abstract xml:lang="en">DYRK1A protein kinase belongs to the CMGC group and is involved in neurodegenerative disorders such as Alzheimer’s disease.In this context we examined an imidazo[1,2-B]pyridazine hit identified by biological screening, through detailed structure-Activity relationship studies. This compound was used to synthesize DYRK1A ATP-Competitive inhibitors by using metallo-Catalyzed methodologies (Pd, Cu) in order to introduce various functionalized moieties.Out of the 60 derivatives synthesized, 7 compounds showed nanomolar activities (IC50 = 41-130 nM).Beside this work of medicinal chemistry, new synthetic methodologies has been developed to regioselectively access polysubstituted pyridazine derivatives. Finally, we developed data and concepts to establish virtual pyridazine libraries for in silico screening.</dcterms:abstract>
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