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<dc:title xml:lang="fr">BTLA, une nouvelle cible thérapeutique pour le traitement du lupus ?</dc:title>
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<dc:subject xml:lang="fr">Lupus</dc:subject>
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<dc:subject xml:lang="fr">Auto-immunité</dc:subject>
<dc:subject xml:lang="fr">Lymphocytes B</dc:subject>
<dc:subject xml:lang="fr">Thérapie</dc:subject>
<dc:subject xml:lang="fr">Anticorps agoniste</dc:subject>
<dc:subject xml:lang="en">Lupus</dc:subject>
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<dc:subject xml:lang="en">Autoimmunity</dc:subject>
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<dcterms:abstract xml:lang="fr">Le lupus est une maladie auto-immune caractérisée par la présence d’auto-anticorps. Ces derniers sont produits par des lymphocytes B (LB) différenciés en plasmocytes, et ayant bénéficié de l’aide des lymphocytes T (LT). Le dialogue entre LT et LB est régulé par des récepteurs inhibiteurs comme B and T Lymphocyte Attenuator (BTLA), dont l’expression et la fonction sont altérées chez les patients lupiques. Mon projet de thèse visait à évaluer le potentiel thérapeutique du ciblage de BTLA par un anticorps (Ac) agoniste dans un modèle murin de lupus. Nous avons montré chez les souris NZB/W, partageant avec l’Homme le défaut de fonction de BTLA, que l’administration d’un Ac anti-BTLA améliore la survie et retarde l’apparition des symptômes. Ces effets bénéfiques sont dus à une réduction de l’activité et du nombre de LB. Nos résultats ouvrent des perspectives pour le développement de nouvelles stratégies thérapeutiques chez les patients.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Lupus is an autoimmune disease characterized by the presence of autoantibodies, produced by Bcells that had received assistance from T cells. The T-B crosstalk is negatively regulated by inhibitory receptors such as B and T Lymphocyte Attenuator (BTLA), whose expression and function are altered in lupus patients. My thesis project aimed at evaluating the therapeutic potential of targeting BTLA with an agonist antibody (Ab) in a murine model of lupus. We showed in NZB/W mice, which share BTLA functional defects with lupus patients, that administration of an anti-BTLA Ab improves survival and delays the onset of symptoms. The beneficial effects are due to reduced activity and number of Version septembre 2024 5 / 4B cells. These results thus open up new perspectives for the development of new therapeutic strategies in lupus patients.</dcterms:abstract>
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