Gadd45γ and Map3k4 Interactions Regulate Mouse Testis Determination via p38 MAPK-Mediated Control of Sry Expression
Citations Over TimeTop 10% of 2012 papers
Abstract
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 Gadd45γ also exhibit XY gonadal sex reversal caused by disruption to Sry expression. Gadd45γ is expressed in a dynamic fashion in somatic cells of the developing gonads from 10.5 days postcoitum (dpc) to 12.5 dpc. Gadd45γ and Map3k4 genetically interact during sex determination, and transgenic overexpression of Map3k4 rescues gonadal defects in Gadd45γ-deficient embryos. Sex reversal in both mutants is associated with reduced phosphorylation of p38 MAPK and GATA4. In addition, embryos lacking both p38α and p38β also exhibit XY gonadal sex reversal. Taken together, our data suggest a requirement for GADD45γ in promoting MAP3K4-mediated activation of p38 MAPK signaling in embryonic gonadal somatic cells for testis determination in the mouse.
Related Papers
- → Delayed Sry and Sox9 expression in developing mouse gonads underlies B6-YDOM sex reversal(2004)156 cited
- → Absence of Correlation betweenSryPolymorphisms and XY Sex Reversal Caused by theM. m. domesticusY Chromosome(1996)30 cited
- → Exclusion of Candidate Genes for Canine SRY-Negative XX Sex Reversal(2005)21 cited
- → Investigation of mutations in the SRY, SOX9, and DAX1 genes in sex reversal patients from the Sichuan region of China(2014)11 cited
- Detection of SRY and SOX9 gene on the patients with sex reversal(2008)