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<dc:title xml:lang="fr">Impact de la réactivation de l'acétylation des histones sur les performances mnésiques dans un modèle transgénique murin de la maladie d'Alzheimer : vers une nouvelle stratégie thérapeutique ?</dc:title>
<dcterms:alternative xml:lang="en">Impact of the reactivation of histone acetylation on memory performance in a transgenic mouse model of Alzheimer's disease : towards a new therapeutic strategy?</dcterms:alternative>
<dc:subject xml:lang="fr">Tauopathie</dc:subject>
<dc:subject xml:lang="fr">Altérations épigénétiques</dc:subject>
<dc:subject xml:lang="fr">Acétylation des histones</dc:subject>
<dc:subject xml:lang="fr">Inhibiteur des HDACs</dc:subject>
<dc:subject xml:lang="fr">Activateur des HATs</dc:subject>
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<dc:subject xml:lang="fr">Mémoire spatiale</dc:subject>
<dc:subject xml:lang="fr">Souris THY-Tau22</dc:subject>
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<dc:subject xml:lang="en">Epigenetic alteration</dc:subject>
<dc:subject xml:lang="en">Histone acetylation</dc:subject>
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<dcterms:abstract xml:lang="fr">La maladie d’Alzheimer (MA) est caractérisée par une perte progressive des capacités mnésiques et des fonctions cognitives accompagnée du développement de dégénérescences neurofibrillaires (DNFs) et de plaque séniles dans le parenchyme cérébral. La découverte de perturbations épigénétiques dans des cerveaux de patients Alzheimer ont mené la communauté scientifique à se tourner vers de nouvelles voies thérapeutiques. De telles altérations, notamment au niveau de l’acétylation des histones de la chromatine, pourraient rendre compte de dysfonctionnements dans l’expression des programmes génétiques. En utilisant les souris THY-Tau22 (développement progressif de DNFs), nous avons évalué l’efficacité de deux stratégies visant à augmenter l’acétylation des histones : activer les HATs et inhiber les HDACs. Ces deux stratégies permettent une récupération des performances en mémoire spatiale chez les souris THY-Tau22, ouvrant ainsi de nouveaux axes thérapeutiques et de recherches dans la MA.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Alzheimer’s disease (AD) is characterized by a progressive loss of memory and cognitive functions associated with the development of neurofibrillary tangles (NFTs) and amyloid plaques in the brain. Nowadays, there is no satisfactory cure for AD. The discovery of epigenetic alterations in AD brain led the scientist community to think about new therapeutic options. Such modifications, and notably those on histone acetylation of the chromatin, could be associated with the genetic dysfunctions observed in AD. The reestablishment of proper epigenetic regulations, and thus gene expression, appears as an original therapeutic option. Using THY-Tau22 mice, we assessed the effect of two strategies aimed at increasing histone acetylation with a HAT activator (CSP-TTK21) or an HDAC inhibitor (phenylbutyrate). We show that both therapeutic strategies allow the rescue of spatial memory performances in the THY-Tau22 mouse model. These results open new leads for AD therapeutics and research.</dcterms:abstract>
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