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<dc:title xml:lang="fr">Identification des potentielles cibles thérapeutiques du peptide P140 chez la souris lupique</dc:title>
<dcterms:alternative xml:lang="en">Identification of the molecular targets of the therapeutic peptide P140 in lupus-prone mice</dcterms:alternative>
<dc:subject xml:lang="fr">Lupus érythémateux disséminé</dc:subject>
<dc:subject xml:lang="fr">Lymphocyte B splénique</dc:subject>
<dc:subject xml:lang="fr">Peptide thérapeutique</dc:subject>
<dc:subject xml:lang="fr">Protéines membranaires</dc:subject>
<dc:subject xml:lang="fr">Interaction protéine-ligand</dc:subject>
<dc:subject xml:lang="fr">Interaction protéine-ligand</dc:subject>
<dc:subject xml:lang="en">Systemic lupus erythematosus</dc:subject>
<dc:subject xml:lang="en">Splenic B lymphocyte</dc:subject>
<dc:subject xml:lang="en">Therapeutic peptide</dc:subject>
<dc:subject xml:lang="en">Membrane proteins</dc:subject>
<dc:subject xml:lang="en">Protein-ligand interaction</dc:subject>
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<tef:elementdEntree autoriteExterne="029682002" autoriteSource="Sudoc">Protéines membranaires</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Ce travail de thèse porte sur l’identification, par spectrométrie de masse, du complexe d’entrée du peptide thérapeutique P140 à la surface des lymphocytes B lupiques (LB). Le développement d’approches protéomiques quantitatives a permis de cartographier les protéines membranaires dérégulées à la surface des LB lupiques et d’identifier celles spécifiquement ciblées par le P140. Une étude préliminaire de l’interaction entre le P140 et un récepteur candidat a été réalisée. En parallèle, les résidus d’acides aminés impliqués dans l’endocytose médiée par les clathrines du P140 ont été identifiés. Enfin, l’effet thérapeutique du P140 chez la souris lupique a mis en évidence un remodelage du microenvironnement splénique, en particulier au niveau des LB. L’identification de nouveaux interactants et de nouvelles voies de signalisation modulées par le P140 renforce son intérêt thérapeutique dans le lupus et ouvre des perspectives pour son application à d’autres pathologies.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This PhD work focuses on the identification, by mass spectrometry, of the entry complex of the therapeutic peptide P140 at the surface of lupus B cells. The development of quantitative proteomics approaches enabled the mapping of dysregulated membrane proteins at the surface of lupus B cells and the identification of those specifically targeted by P140. A preliminary study of the interaction between P140 and a candidate receptor was conducted. In parallel, the amino acid residues involved in clathrin-mediated endocytosis of P140 were identified. Finally, the therapeutic effect of P140 in a lupus mouse model revealed a remodeling of the splenic microenvironment, particularly affecting B cells. The identification of new interactors and signaling pathways modulated by P140 reinforces its therapeutic potential in lupus and opens perspectives for its application to other pathologies.</dcterms:abstract>
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