| First Author | Warr N | Year | 2012 |
| Journal | Dev Cell | Volume | 23 |
| Issue | 5 | Pages | 1020-31 |
| PubMed ID | 23102580 | Mgi Jnum | J:191096 |
| Mgi Id | MGI:5460946 | Doi | 10.1016/j.devcel.2012.09.016 |
| Citation | Warr N, et al. (2012) Gadd45gamma and Map3k4 interactions regulate mouse testis determination via p38 MAPK-mediated control of Sry expression. Dev Cell 23(5):1020-31 |
| abstractText | Loss of the kinase MAP3K4 causes mouse embryonic gonadal sex reversal due to reduced expression of the testis-determining gene, Sry. However, because of widespread expression of MAP3K4, the cellular basis of this misregulation was unclear. Here, we show that mice lacking Gadd45gamma also exhibit XY gonadal sex reversal caused by disruption to Sry expression. Gadd45gamma is expressed in a dynamic fashion in somatic cells of the developing gonads from 10.5 days postcoitum (dpc) to 12.5 dpc. Gadd45gamma and Map3k4 genetically interact during sex determination, and transgenic overexpression of Map3k4 rescues gonadal defects in Gadd45gamma-deficient embryos. Sex reversal in both mutants is associated with reduced phosphorylation of p38 MAPK and GATA4. In addition, embryos lacking both p38alpha and p38beta also exhibit XY gonadal sex reversal. Taken together, our data suggest a requirement for GADD45gamma in promoting MAP3K4-mediated activation of p38 MAPK signaling in embryonic gonadal somatic cells for testis determination in the mouse. |
