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<dc:title xml:lang="fr">Identification de nouveaux neuroprotecteurs dans la lutte contre la sclérose en plaques (SEP) : évaluation préclinique du potentiel neuroprotecteur du neurostéroïde 3α-O-allyl-allopregnanolone (BR351) dans un modèle animal de la SEP</dc:title>
<dcterms:alternative xml:lang="en">Identification of new neuroprotective agents in animal models of multiple sclerosis : preclinical evaluation of the neuroprotective potential of the neurosteroid 3α-O-allyl-allopregnanolone (BR351) in an animal model of MS</dcterms:alternative>
<dc:subject xml:lang="fr">Sclérose en plaques</dc:subject>
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<dc:subject xml:lang="fr">Neuroinflammation</dc:subject>
<dc:subject xml:lang="fr">Neuroprotection</dc:subject>
<dc:subject xml:lang="en">Multiple sclerosis</dc:subject>
<dc:subject xml:lang="en">Experimental autoimmune encephalomyelitis</dc:subject>
<dc:subject xml:lang="en">Analogs of allopregnanolone</dc:subject>
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<dcterms:abstract xml:lang="fr">La sclérose en plaques est une maladie auto-immune affectant le système nerveux central, caractérisée par une inflammation chronique induisant une démyélinisation active jusqu'à la neurodégénérescence. Bien que les thérapies modifiant l'évolution de la maladie ralentissent la progression de la sclérose en plaques, elles ne se concentrent pas sur la protection de la myéline et de l'axone contre les processus neurodégénératifs. Malgré les progrès réalisés dans la prise en charge de la SEP, les traitements actuels imposent des contraintes et/ou des effets secondaires importants pour les patients, et les thérapies neuroprotectrices efficaces font toujours défaut. Notre travail de thèse a produit des résultats précliniques pertinents concernant les effets neuroprotecteurs du neurostéroïde BR351 dans un modèle animal de la sclérose en plaques. La combinaison de différentes approches expérimentales, telles que l'évaluation clinique, l'évaluation comportementale à l'aide du système Catwalk, les analyses histopathologiques et cellulaires ont démontré que le BR351 réduit efficacement les symptômes cliniques et les marqueurs neuropathologiques chez les souris PLP-EAE au pic de la maladie. Dans l'ensemble, nos données suggèrent que le BR351 pourrait représenter un composé prometteur à explorer pour le développement de stratégies thérapeutiques neuroprotectrices efficaces contre la sclérose en plaques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Multiple sclerosis (MS) is an autoimmune disease affecting the central nervous system, from chronic inflammation inducing active demyelination to neurodegeneration. While disease-modifying therapies slow down the progression of MS, they do not protect efficiently the myelin sheath and axon from neurodegenerative processes. Therefore, the characterization of novel neuroprotective drugs to treat MS effectively with little or no side effects remains a large clinically unmet need. The relapsing-remitting MS affecting 85% of patients is reliably mimicked by the proteolipid-protein (PLP)-induced experimental autoimmune encephalomyelitis (EAE) SJL/J-mouse model. Hence, my thesis project was to use the PLP-EAE SJL/J-mouse model of MS to evaluate in vivo the therapeutic and neuroprotective potential of neurosteroid 3α-O-allyl-allopregnanolone (BR351) which exhibited a strong preventive effect against neural cell death in previous in vitro studies. Therefore, we combined clinical scoring, and behavioral and histopathological assessments to demonstrate that BR351 effectively reduced clinical symptoms and neuropathological markers in PLP-EAE mice at the peak of the disease. Overall, our data suggest that the neurosteroid BR351 may represent an interesting compound to explore for developing effective neuroprotective strategies against MS.</dcterms:abstract>
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