Human cis-acting elements regulating escape from X-chromosome inactivation function in mouse.

Abstract:

:A long-standing question concerning X-chromosome inactivation (XCI) has been how some genes avoid the otherwise stable chromosome-wide heterochromatinization of the inactive X chromosome. As 20% or more of human X-linked genes escape from inactivation, such genes are an important contributor to sex differences in gene expression. Although both human and mouse have genes that escape from XCI, more genes escape in humans than mice, with human escape genes often clustering in larger domains than the single escape genes of mouse. Mouse models offer a well-characterized and readily manipulated system in which to study XCI, but given the differences in genes that escape it is unclear whether the mechanism of escape gene regulation is conserved. To address conservation of the process and the potential to identify elements by modelling human escape gene regulation using mouse, we integrated a human and a mouse BAC each containing an escape gene and flanking subject genes at the mouse X-linked Hprt gene. Escape-level expression and corresponding low promoter DNA methylation of human genes RPS4X and CITED1 demonstrated that the mouse system is capable of recognizing human elements and therefore can be used as a model for further refinement of critical elements necessary for escape from XCI in humans.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Peeters SB,Korecki AJ,Simpson EM,Brown CJ

doi

10.1093/hmg/ddy039

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

1252-1262

issue

7

eissn

0964-6906

issn

1460-2083

pii

4833562

journal_volume

27

pub_type

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