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<dc:title xml:lang="fr">Analyse de l’ADN libre circulant dans le sang de patients atteints de sclérose en plaques : évaluation de la valeur diagnostique</dc:title>
<dcterms:alternative xml:lang="en">Analysis of cell-free DNA in the blood of patients with multiple sclerosis : evaluation of diagnostic value</dcterms:alternative>
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<dcterms:abstract xml:lang="fr">La sclérose en plaques est une maladie auto-immune inflammatoire du système nerveux central dont les mécanismes physiopathologiques sont complexes et hétérogènes. Les biomarqueurs utilisés pour le diagnostic sont l’IRM cérébrale et médullaire et les bandes oligoclonales spécifiques du liquide cérébrospinal. Il est cependant nécessaire de rechercher de nouveaux biomarqueurs afin d’améliorer la précision diagnostique. De nouvelles pistes se portent sur l’ADN libre circulant dont les quantités peuvent varier en conditions pathologiques. L’objectif de ce travail était donc d’identifier de nouveaux biomarqueurs en analysant les quantités d’ADN libre circulant d’une sélection de gènes. Au cours du ce travail, nous avons pu mettre en évidence 11 marqueurs dont les quantités d’ADN libre circulant diffèrent chez les patients atteints de SEP. Ces marqueurs étaient tous impliqués dans la physiopathologie de la SEP à divers niveaux : neurones (NEFH), oligodendrocytes (MBP, MOG, OLIG2), myélinisation (AMIGO3, LINGO1), astrocytes (S100B), mitochondries (MTCO1), lymphocytes (CD8A) et cibles thérapeutiques (ITGA4). Leur combinaison a permis de développer une signature moléculaire permettant de discriminer les patients atteints de sclérose en plaques</dcterms:abstract>
<dcterms:abstract xml:lang="en">Multiple sclerosis is a complex and heterogeneous autoimmune inflammatory disease of the central nervous system. Diagnostic biomarkers commonly used include brain and spinal cord MRI, as well as specific oligoclonal bands in cerebrospinal fluid. However, it is necessary to search for new biomarkers to enhance diagnostic accuracy. New avenues of investigation focus on cell-free DNA, which can vary in pathological conditions. The objective of this study was to identify new biomarkers by analyzing the levels of circulating free DNA from a selected set of genes.During this study, we were able to identify 11 markers with differing levels of cell-free DNA in patients with multiple sclerosis. These markers were all involved in the pathophysiology of multiple sclerosis at various levels, including neurons (NEFH), oligodendrocytes (MBP, MOG, OLIG2), myelination (AMIGO3, LINGO1), astrocytes (S100B), mitochondria (MTCO1), lymphocytes (CD8A), and therapeutic targets (ITGA4). Their combination allowed the development of a molecular signature to distinguish patients with multiple sclerosis from control subjects.</dcterms:abstract>
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