ZFIN ID: ZDB-PUB-160605-5
Sex differences in DNA methylation and expression in zebrafish brain: a test of an extended 'male sex drive' hypothesis
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.
Date: 2016
Source: Gene   590(2): 307-16 (Journal)
Registered Authors: Horsfield, Jules, Mathavan, S.
Keywords: Brain, CpG island, CpG site, DNA methylation, Male sex drive, Masculinization, RNA-Seq, RRBS, Sexual dimorphism, Zebrafish
MeSH Terms:
  • Animals
  • Brain/metabolism*
  • Chromosomes/genetics
  • Cluster Analysis
  • CpG Islands/genetics
  • DNA Methylation/genetics*
  • DNA, Intergenic/genetics
  • Female
  • Gene Expression Profiling
  • Gene Expression Regulation*
  • Genome/genetics
  • Male
  • Models, Biological*
  • Sex Characteristics*
  • Transcription, Genetic
  • Zebrafish/genetics*
PubMed: 27259666 Full text @ Gene
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.