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<dc:title xml:lang="fr">Rôle de NR5A1 dans le destin des cellules de Sertoli fœtales chez la souris</dc:title>
<dcterms:alternative xml:lang="en">Role of NR5A1 in the fate of fetal Sertoli cells in mice</dcterms:alternative>
<dc:subject xml:lang="fr">Souris</dc:subject>
<dc:subject xml:lang="fr">Mutation</dc:subject>
<dc:subject xml:lang="fr">Testicule</dc:subject>
<dc:subject xml:lang="fr">Différenciation</dc:subject>
<dc:subject xml:lang="fr">NR5A1</dc:subject>
<dc:subject xml:lang="fr">Sertoli</dc:subject>
<dc:subject xml:lang="fr">Leydig</dc:subject>
<dc:subject xml:lang="fr">Granulosa</dc:subject>
<dc:subject xml:lang="fr">Anoïkis</dc:subject>
<dc:subject xml:lang="fr">Précurseur gonadique</dc:subject>
<dc:subject xml:lang="fr">Hermaphrodisme</dc:subject>
<dc:subject xml:lang="fr">Dysgénésie testiculaire</dc:subject>
<dc:subject xml:lang="en">Mice</dc:subject>
<dc:subject xml:lang="en">Mutation</dc:subject>
<dc:subject xml:lang="en">Testis</dc:subject>
<dc:subject xml:lang="en">Differentiation</dc:subject>
<dc:subject xml:lang="en">NR5A1</dc:subject>
<dc:subject xml:lang="en">Sertoli cells</dc:subject>
<dc:subject xml:lang="en">Leydig cells</dc:subject>
<dc:subject xml:lang="en">Granulosa cells</dc:subject>
<dc:subject xml:lang="en">Anoikis</dc:subject>
<dc:subject xml:lang="en">Gonadal precursor</dc:subject>
<dc:subject xml:lang="en">Hemarphrodism</dc:subject>
<dc:subject xml:lang="en">Testicular dysgenesis</dc:subject>
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<tef:elementdEntree autoriteExterne="061607258" autoriteSource="Sudoc">Cellules de Sertoli</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Chez les mammifères le récepteur nucléaire NR5A1 (Steroidogenic Factor 1) est essentiel pour développement du testicule, dans lequel il est notamment exprimé par les cellules somatiques de soutien appelées cellules de Sertoli (CS). La mise en place de l’architecture testiculaire et plus globalement du tractus-urogénital, dépendent de signaux émanant des CS. Mon projet consiste à étudier le rôle de Nr5a1 dans les CS au cours du développement testiculaire. Pour cela j'ai analysé le phénotype des souris mâles dont le gène Nr5a1 est invalidé dans les CS après la différenciation sexuelle. Ces travaux ont montré qu’en l’absence de Nr5a1 les CS ne sont plus en mesure d’assurer leurs fonctions et que leur signature transcriptomique traduit un changement de leur identité. A terme, la totalité des CS invalidées pour Nr5a1 meurent ce qui nous a permis d’obtenir un modèle d’étude unique pour analyser le développement du testicule et du tractus-urogénital en l’absence de CS. Ensemble mes résultats permettent de mieux appréhender d’une part, le rôle de Nr5a1 dans le maintien de l’identité des CS et leur survie, et d’autre part de comprendre l’influence des CS sur les autres types cellulaires du testicule et sur le développement du tractusurogénital.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In mammals, the NR5A1 nuclear receptor (Steroidogenic Factor 1) is essential for the testis development, in which it is specifically expressed by the somatic supporting cells called Sertoli cells (SC). The establishment of the testicular architecture and more globally of the urogenital tract, depends on signals emanating from the SC. The goal of my project is to study the role of Nr5a1 gene in SC during testicular development. For this I analyzed the phenotype of male mice in which Nr5a1 gene is deleted in SC after sexual differentiation. This work shows that in the absence of Nr5a1, SC are no longer able to perform their functions effectively and that their transcriptomic signature reflects a change in their identity. Eventually, all of the SC invalidated for Nr5a1 die, which allowed us to obtain a unique model to analyze the development of the testis and the urogenital tract in the absence of SC. Taken together, these results allowed us to decipher the role of Nr5a1 in maintaining the identity and the survival of SC, as well as to understand the influence of SC on other cell types of the testis and on the development of the urogenital tract.</dcterms:abstract>
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