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<dc:title xml:lang="en">Roles of autophagy-related proteins in antigen presentation by antigen presenting cells</dc:title>
<dcterms:alternative xml:lang="fr">Rôle des protéines associées à l’autophagie lors de la présentation antigénique des cellules présentatrices d’antigène</dcterms:alternative>
<dc:subject xml:lang="fr">Autophagie</dc:subject>
<dc:subject xml:lang="fr">Autoimmunité</dc:subject>
<dc:subject xml:lang="fr">Lymphocyte B</dc:subject>
<dc:subject xml:lang="fr">Macrophage</dc:subject>
<dc:subject xml:lang="en">Autophagy</dc:subject>
<dc:subject xml:lang="en">Autoimmunity</dc:subject>
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<dcterms:abstract xml:lang="fr">La présentation antigénique joue un rôle crucial dans l'immunité adaptative. Les protéines d'autophagie orchestrent la macroautophagie, un processus essentiel pour l'homéostasie cellulaire, et peuvent également être recrutées sur des membranes endolysosomales. Ces processus influencent la présentation antigénique. J'ai démontré que la macroautophagie n'est pas dérégulée dans les cellules mononuclées du sang périphérique des patients atteints de sclérodermie systémique. Cependant, les macrophages ne recrutent pas efficacement LC3 sur les phagosomes. Les lymphocytes B capturent l'antigène via le récepteur BCR. J'ai montré qu'ATG16L1 est impliqué dans la polarisation du BCR après reconnaissance d'un antigène particulaire. ATG16L1 interagit avec SNAP23 pour diriger le récepteur internalisé vers des compartiments acides. Ces résultats pourraient permettre de proposer de nouvelles stratégies thérapeutiques pour optimiser la présentation antigénique et pour la sclérodermie systémique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Antigen presentation plays a crucial role in adaptive immunity. Autophagy proteins orchestrate macroautophagy, a process essential for cellular homeostasis, and can also be recruited to endolysosomal membranes. These processes affect antigen presentation. I have shown that macroautophagy is not deregulated in peripheral blood mononuclear cells from patients with systemic scleroderma. However, macrophages do not efficiently recruit LC3 into phagosomes. B lymphocytes capture antigen via the BCR receptor. I have shown that ATG16L1 is involved in BCR polarisation following recognition of a particulate antigen. ATG16L1 interacts with SNAP23 to direct the internalized receptor to acidic compartments. These results may lead to new therapeutic strategies to optimise antigen presentation and for the treatment of systemic scleroderma.</dcterms:abstract>
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