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<dc:title xml:lang="en">Characterization of the interactome of the cytosolic dsRNA receptor Dicer-2 in vivo during viral infection in Drosophila melanogaster</dc:title>
<dcterms:alternative xml:lang="fr">Caractérisation de l’interactome du récepteur d’ARNdb cytosolique Dicer-2 in vivo au cours de l’infection virale chez Drosophila melanogaster</dcterms:alternative>
<dc:subject xml:lang="fr">Drosophila melanogaster</dc:subject>
<dc:subject xml:lang="fr">Drosophila C virus</dc:subject>
<dc:subject xml:lang="fr">Spectrométrie de masse</dc:subject>
<dc:subject xml:lang="fr">Interactome</dc:subject>
<dc:subject xml:lang="fr">ARNdb</dc:subject>
<dc:subject xml:lang="fr">Virus</dc:subject>
<dc:subject xml:lang="fr">Hélicase DEAD-box</dc:subject>
<dc:subject xml:lang="fr">ARN interférence</dc:subject>
<dc:subject xml:lang="en">Drosophila melanogaster</dc:subject>
<dc:subject xml:lang="en">Drosophila C virus</dc:subject>
<dc:subject xml:lang="en">Mass spectrometry</dc:subject>
<dc:subject xml:lang="en">Interactome</dc:subject>
<dc:subject xml:lang="en">DsRNA</dc:subject>
<dc:subject xml:lang="en">Virus</dc:subject>
<dc:subject xml:lang="en">DEAD-box helicase</dc:subject>
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<tef:elementdEntree autoriteExterne="08522457X" autoriteSource="Sudoc">ARN interférence</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Le sujet de cette thèse porte sur l’immunité antivirale chez la drosophile. Mon projet principal est axé sur une protéine majeure de l’immunité antivirale chez les insectes, Dicer-2. Cette protéine est un senseur d’acides nucléiques pour la voie de l’ARN interférence (ARNi) antivirale. Dicer-2 s’associe avec et est régulé par différents partenaires, et mon but a été de comprendre comment ce réseau protéique est modulé lors de l’infection par le Drosophila C Virus (DCV). Ceci a permis l’identification de différents candidats dont j'ai pu, par la suite, confirmer l’interaction avec Dicer-2. En réalisant deux cribles ARNi, in vivo et ex vivo, j’ai pu identifier plusieurs autres candidats comme ayant un impact sur l’infection par DCV. En parallèle, j’ai travaillé sur une protéine liée à l’épissage, Fandango, qui a été identifiée comme interactant du poly(I:C) par mon laboratoire d’accueil. L’effet antiviral global de cette protéine a été mis en évidence lors d’un crible ARNi utilisant plusieurs virus. Après avoir étudié l’impact de Fandango sur l’infection par DCV, nous avons étudié son lien avec le spliceosome. Globalement, ce travail a fourni une ressource composée de différents candidats qui peuvent maintenant être étudiés plus en détails afin d’obtenir une meilleure compréhension de l’immunité antivirale chez la drosophile.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The topic of this thesis is centered on antiviral immunity in D. melanogaster. My main project was focused on a major protein of insect antiviral immunity, Dicer-2. This protein is a nucleic acid sensor for the antiviral RNA interference (RNAi) pathway. Dicer-2 associates with and is regulated by several partners, and my aim has been to understand how this network is modulated by Drosophila C Virus (DCV) infection. Amongst the identified candidates, some were subsequently confirmed to interact with Dicer-2. By performing two RNAi screens, in vivo and ex vivo, I have highlighted several other proteins as having an impact on DCV infection. In parallel, I worked on a protein linked with splicing, Fandango, that was identified as a poly (I:C) interactant by my host laboratory. The global antiviral effect of this protein was shown in an ex vivo screen using different viruses. After studying the impact of Fandango on DCV infection, we attempted to determine if this impact was linked to the spliceosome. Overall, this work has provided a pool of candidates that can now be investigated further to gain a better understanding of antiviral immunity in drosophila.</dcterms:abstract>
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