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Last name: DE CIAN
First name: Marie-Cécile
International audience
Le sexe de l'embryon est décidé au moment de la fécondation par la transmission paternelle du chromosome sexuel X ou Y, tandis que la mère fournit un de ses deux chromosomes X. La différenciation sexuelle débute par le processus de détermination du sexe, qui va permettre le développement de l'ébauche gonadique soit en testicule, chez l'embryon...
In mammals, testicular differentiation is initiated by transcription factors SRY and SOX9 in XY gonads, and ovarian differentiation involves R-spondin1 (RSPO1) mediated activation of WNT/b-catenin signaling in XX gonads. Accordingly, the absence of RSPO1/Rspo1 in XX humans and mice leads to testicular differentiation and female-to-male sex...
R-spondin2 (RSPO2) is a member of the R-spondin family, which are secreted activators of the WNT/β-catenin (CTNNB1) signaling pathway. In the mouse postnatal ovary, WNT/CTNNB1 signaling is active in the oocyte and in the neighboring supporting cells, the granulosa cells. Although the role of Rspo2 has been previously studied using in vitro...
Sex determination in mammals depends on the differentiation of the supporting lineage of the gonads into Sertoli or pregranulosa cells that govern testis and ovary development, respectively. Although the Y-linked testis-determining gene Sry has been identified, the ovarian-determining factor remains unknown. In this study, we identified −KTS, a...