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<dc:title xml:lang="fr">Développement de nouveaux modulateurs des récepteurs sérotoninergiques 5-ht2b dépourvus d'effets secondaires cardiovasculaires dans le traitement de la sclérose latérale amyotrophique</dc:title>
<dcterms:alternative xml:lang="en">Development of new modulators of serotoninergic receptors 5-ht2b without cardiovascular side effects in the treatment of lateral amyotrophic sclerosis</dcterms:alternative>
<dc:subject xml:lang="fr">Pharmacologie</dc:subject>
<dc:subject xml:lang="fr">SLA</dc:subject>
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<dc:subject xml:lang="fr">Β-arrestine</dc:subject>
<dc:subject xml:lang="en">Pharmacology</dc:subject>
<dc:subject xml:lang="en">ALS</dc:subject>
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<dcterms:abstract xml:lang="fr">Les récepteurs 5-HT2B constituent une cible intéressante dans la prise en charge de nombreuses pathologies, notamment de la sclérose latérale amyotrophique (SLA). La SLA est une pathologie neurodégénérative caractérisée, entre autres, par une forte activation microgliale. Nos travaux démontrent un manque d’efficacité d’un agoniste du 5-HT2BR dans le modèle Sod1G86R de SLA. La modulation de l’activation microgliale observée n’est pas suffisante pour induire un effet protecteur. Les agonistes du 5-HT2BR induisent un développement de valvulopathies, leur utilisation est donc limitée à des traitements court-termes et à faible dose. L’étude du mécanisme de développement de ces valvulopathies pourrait permettre le développement de nouveaux modulateurs de ce récepteur, dépourvu d’effets secondaires cardiaques. Nos études successives sur l’implication de la voie β-arrestine 2 et NOS3 grâce à des modèles murins de fond génétiques distincts, ont mis en évidence l’impact du fond génétique sur la réponse à un ligand valvulopathogène.</dcterms:abstract>
<dcterms:abstract xml:lang="en">5-HT2B receptors constitute an interesting target in the management of numerous pathologies, as amyotrophic lateral sclerosis (ALS). ALS is a neurodegenerative disease characterized by strong microglial activation. Our work demonstrates a lack of efficacy of a 5-HT2BR agonist in the Sod1G86R model of SLA. The modulation of microglial activation observed is not sufficient to induce a protective effect. 5-HT2BR agonists induce the development of valve disease, so their use is limited to short-term, low-dose treatments. The study of the mechanism of development of these valve diseases could allow the development of new modulators of this receptor, devoid of cardiac side effects. Our successive studies on the involvement of the β-arrestin 2 and NOS3 pathway using distinct genetic background murine models have demonstrated the impact of the genetic background on the response to a valvulopathogenic ligand.</dcterms:abstract>
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