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<dc:title xml:lang="en">Study of TSLP-OX40L signaling in the T cell response in atopic dermatitis</dc:title>
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<dc:subject xml:lang="fr">Dermatite atopique</dc:subject>
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<dc:subject xml:lang="fr">Peau</dc:subject>
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<dcterms:abstract xml:lang="fr">La dermatite atopique (DA) est une maladie chronique inflammatoire de la peau qui affecte 20% des enfants et jusque 3-5% des adultes. Elle est caractérisée par une réponse immunitaire de type II aberrante qui est mise en place par les lymphocytes Th2. Ma thèse porte sur l’étude du rôle de la voie de signalisation TSLP-OX40L dans la mise en place de la réponse T dans le contexte de la DA. En combinant de nouveaux outils génétiques murins et un protocole de DA expérimentale précédemment mis au point par le laboratoire, nous avons montré que TSLP induit l’expression de OX40L par les cellules dendritiques (DC) afin d’induire les GATA3+ Treg ayant une forte capacité à limiter la réponse T. Nous avons ensuite utilisé le scRNAseq et la cytométrie en flux pour caractériser les DC exprimant OX40L. Ces résultats fournissent une nouvelle perspective au fait que OX40L représente une cible de choix pour traiter la DA.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Atopic dermatitis (AD) is a skin chronic inflammatory disease that affects 20% of children and up to 3-5% of adults. It is characterized by an aberrant type II immune response that is set up by type 2 helper T cells. My thesis focuses on the study of the role of the TSLP-OX40L signaling pathway in the establishment of the T cells response in the context of AD. By combining new mouse genetic tools and an AD experimental protocol previously established by the laboratory, we showed that TSLP promotes the expression of OX40L by dendritic cells (DCs) in order to induce GATA3+ Tregs that have a strong capacity to limit the T cell responses. We then used scRNAseq and flow cytometry to characterize the OX40L-expressing DCs. These results provide new insight into the fact that OX40L represents a target of interest for treating AD.</dcterms:abstract>
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