Rspo1 dependent WNT signaling safeguards ovarian development by suppressing androgen signaling
Tang, F.; Bellido-Carreras, N.; Bouzid, K.; Lardenois, A.; Darde, T. A.; Dhellemmes, M.; Despoux, A.; Peitzsch, M.; Birling, M.-C.; Chalmel, F.; Chaboissier, M.-C.; Perea Gomez, A.
Show abstract
Embryonic ovarian development requires high levels of WNT/B-catenin signaling yet the molecular basis of this requirement remains unclear. Mutations in the WNT potentiator RSPO1 impair ovarian development in both mouse and human, leading to gonadal masculinization in XX individuals. Here, we show that RSPO1 acts within a restricted developmental window at the onset of ovarian differentiation and that its absence triggers precocious androgen signaling in the developing ovaries. Moreover, androgen receptor inhibition rescues ovarian development in Rspo1 mutant mice. Our findings identify RSPO1/WNT/B-catenin signaling as an essential pathway that suppresses androgen signaling to ensure proper ovarian development in mouse.
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