Thèse soutenue

Etude de gènes spécifiquement ou préférentiellement exprimés dans l'ovocyte chez la souris

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Auteur / Autrice : Amélie Betmon-Paillisson
Direction : Philippe Monget
Type : Thèse de doctorat
Discipline(s) : Sciences de la vie
Date : Soutenance en 2007
Etablissement(s) : Tours

Mots clés

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Résumé

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Mammalian oocyte modulates ovarian folliculogenesis, fertilization, is responsible to the activation of the zygotique genome and to the early embryonic development. Several works show the importance of some oocyte-specific genes. In order to better understand the regulation of these processes, new specific or preferantially transcripts of the oocytes were identified, thanks to bioinformatic tools. The first step of this work concerned the characterization these new transcripts. The second step concerned the phylogenomic analysis of several oocyte-specific genes. These oocyte-specific genes seem to undergo a particularly fast evolutionary rate. Finally, in a third step, we show that the anti-apoptotic gene, Mdm2, but probably not Mdm4, is crucial for oocytes survival, its invalidation in the mouse female germinal celle leading to sterility.