Sex differences in DNA methylation and expression in zebrafish brain: a test of an extended ‘male sex drive’ hypothesis

Aniruddha Chatterjee, Malgorzata Lagisz, Euan J. Rodger, Li Zhen, Peter A. Stockwell, Elizabeth J. Duncan, Julia A. Horsfield, Justin Jeyakani, Sinnakaruppan Mathavan, Yuichi Ozaki, Shinichi Nakagawa

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The sex drive hypothesis predicts that stronger selection on male traits has resulted in masculinization of the genome. Here we test whether such masculinizing effects can be detected at the level of the transcriptome and methylome in the adult zebrafish brain. Although methylation is globally similar, we identified 914 specific differentially methylated CpGs (DMCs) between males and females (435 were hypermethylated and 479 were hypomethylated in males compared to females). These DMCs were prevalent in gene body, intergenic regions and CpG island shores. We also discovered 15 distinct CpG clusters with striking sex-specific DNA methylation differences. In contrast, at transcriptome level, more female-biased genes than male-biased genes were expressed, giving little support for the male sex drive hypothesis. Our study provides genome-wide methylome and transcriptome assessment and sheds light on sex-specific epigenetic patterns and in zebrafish for the first time.

Original languageEnglish
Pages (from-to)307-316
Number of pages10
JournalGene
Volume590
Issue number2
DOIs
Publication statusPublished - 2016 Sep 30

Keywords

  • Brain
  • CpG island
  • CpG site
  • DNA methylation
  • Male sex drive
  • Masculinization
  • RNA-Seq
  • RRBS
  • Sexual dimorphism
  • Zebrafish

ASJC Scopus subject areas

  • Genetics

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    Chatterjee, A., Lagisz, M., Rodger, E. J., Zhen, L., Stockwell, P. A., Duncan, E. J., Horsfield, J. A., Jeyakani, J., Mathavan, S., Ozaki, Y., & Nakagawa, S. (2016). Sex differences in DNA methylation and expression in zebrafish brain: a test of an extended ‘male sex drive’ hypothesis. Gene, 590(2), 307-316. https://doi.org/10.1016/j.gene.2016.05.042