Sex-specific Parent-of-origin Allelic Expression in the Mouse Brain

Overview

Journal Science

Specialty Science

Date 2010 Jul 10

PMID 20616234

Citations 182

Authors

Christopher Gregg

Jiangwen Zhang

James E Butler

David Haig

Catherine Dulac

Affiliations

Soon will be listed here.

Abstract

Genomic imprinting results in preferential gene expression from paternally versus maternally inherited chromosomes. We used a genome-wide approach to uncover sex-specific parent-of-origin allelic effects in the adult mouse brain. Our study identified preferential selection of the maternally inherited X chromosome in glutamatergic neurons of the female cortex. Moreover, analysis of the cortex and hypothalamus identified 347 autosomal genes with sex-specific imprinting features. In the hypothalamus, sex-specific imprinted genes were mostly found in females, which suggests parental influence over the hypothalamic function of daughters. We show that interleukin-18, a gene linked to diseases with sex-specific prevalence, is subject to complex, regional, and sex-specific parental effects in the brain. Parent-of-origin effects thus provide new avenues for investigation of sexual dimorphism in brain function and disease.

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