Novel sex-dependent differentially methylated regions are demethylated in adult male mouse livers

Shuhei Ito, Keiji Hirabayashi, Kohji Moriishi, Yasuhisa Matsui, Kyoji Moriya, Kazuhiko Koike, Yoshiharu Matsuura, Kunio Shiota, Shintaro Yagi

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Abstract In mammalian livers, sexual dimorphisms are observed in tissue-specific functions and diseases such as hepatocellular carcinoma. We identified sex-dependent differentially methylated regions (S-DMRs) which had been previously been characterized as growth hormone- STAT5 dependent. In this study, we performed genome-wide screening and identified ten additional hypomethylated S-DMR gene regions in male livers. Of these S-DMRs, Uggt2 and Sarnp were hypomethylated in both male and female livers compared to brain and embryonic stem (ES) cells. Similarly, Adam2, Uggt2, and Scp2 were hypomethylated in female embryonic germ (EG) cells and not in male EG cells, indicating that these S-DMRs are liver-specific male hypo-S-DMRs. Interestingly, the five S-DMRs were free from STAT5 chromatin immunoprecipitation (ChIP) signals, suggesting that S-DMRs are independent of the growth hormone-STAT5-pathway. Instead, the DNA methylation statuses of the S-DMRs of Adam2, Snx29, Uggt2, Sarnp, and Rnpc3 genes were under the control of testosterone. Importantly, the hypomethylated S-DMRs of the Adam2 and Snx29 regions showed chromatin decondensation. Epigenetic factors could be responsible for the sexual dimorphisms in DNA methylation status and chromatin structure, as the expression of Dnmt1, Dnmt3b, and Tet2 genes was lower in male mice compared to female mice and TET2 expression recovered following orchidectomy by testosterone treatment. In conclusion, we identified novel male-specific hypomethylated S-DMRs that contribute to chromatin decondensation in the liver. S-DMRs were tissue-specific and the hypomethylation is testosterone-dependent.

本文言語English
論文番号33883
ページ(範囲)332-338
ページ数7
ジャーナルBiochemical and biophysical research communications
462
4
DOI
出版ステータスPublished - 2015 6 12

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学

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