Sexually dimorphic expression of Usp9x is related to sex chromosome complement in adult mouse brain

J. Xu, S. Taya, K. Kaibuchi, Arthur P. Arnold

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

We found the expression of Usp9x, an X-linked gene which encodes a ubiquitin protease implicated in synaptic development, to be significantly higher in the adult female mouse brains than in male brains. The sex difference in expression of Usp9x was localized to specific brain regions such as neocortex. Furthermore, in gonadally intact and gonadectomized mice, XX mice expressed Usp9x mRNA and protein more highly than XY mice irrespective of their gonadal type. No sex difference was found in the neonatal brain or peripheral tissues such as the adult kidney. This finding implies that the difference in sex chromosome complement between XY males and XX females could potentially contribute to sexual differentiation of brain structure and function. The relation of genomic dose and Usp9x expression could help explain the neural and behavioural phenotype of women with XO Turner syndrome.

Original languageEnglish
Pages (from-to)3017-3022
Number of pages6
JournalEuropean Journal of Neuroscience
Volume21
Issue number11
DOIs
Publication statusPublished - 06-2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

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