1. Distinct roles of androgen receptor, estrogen receptor alpha, and BCL6 in the establishment of sex-biased DNA methylation in mouse liver
- Author
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Jeffrey D Zajac, Anna K. Naumova, Akihide Kamiya, Kinuyo Ida, Matthew L Chang, Teruko Taketo, Najla AlOgayil, Guillaume Bourque, Varun S Venkatesh, Qinwei Kim-Wee Zhuang, Jose Hector Galvez, Rachel A Davey, and Klara Bauermeister
- Subjects
Male ,Molecular biology ,Science ,Sexism ,Disorders of Sex Development ,Estrogen receptor ,Biology ,Article ,Epigenesis, Genetic ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Testis ,Genetics ,Animals ,Author Correction ,030304 developmental biology ,Regulation of gene expression ,0303 health sciences ,Sex Characteristics ,Multidisciplinary ,Ovary ,Estrogen Receptor alpha ,Gene Expression Regulation, Developmental ,Methylation ,DNA Methylation ,Androgen receptor ,Differentially methylated regions ,Testis determining factor ,Gene Expression Regulation ,Liver ,Receptors, Androgen ,DNA methylation ,Proto-Oncogene Proteins c-bcl-6 ,Medicine ,Female ,Estrogen receptor alpha ,030217 neurology & neurosurgery - Abstract
Sexual dimorphism in gene regulation, including DNA methylation, is the main driver of sexual dimorphism in phenotypes. However, the questions of how and when sex shapes DNA methylation remain unresolved. Recently, using mice with different combinations of genetic and phenotypic sex, we identified sex-associated differentially methylated regions (sDMRs) that depended on the sex phenotype. Focusing on a panel of validated sex-phenotype dependent male- and female-biased sDMRs, we tested the developmental dynamics of sex bias in liver methylation and the impacts of mutations in the androgen receptor, estrogen receptor alpha, or the transcriptional repressor Bcl6 gene. True hermaphrodites that carry both unilateral ovaries and contralateral testes were also tested. Our data show that sex bias in methylation either coincides with or follows sex bias in the expression of sDMR-proximal genes, suggesting that sex bias in gene expression may be required for demethylation at certain sDMRs. Global ablation of AR, ESR1, or a liver-specific loss of BCL6, all alter sDMR methylation, whereas presence of both an ovary and a testis delays the establishment of male-type methylation levels in hermaphrodites. Moreover, the Bcl6-LKO shows dissociation between expression and methylation, suggesting a distinct role of BCL6 in demethylation of intragenic sDMRs.
- Published
- 2021