Format

Send to

Choose Destination
See comment in PubMed Commons below
Stem Cells. 2012 Jan;30(1):48-54. doi: 10.1002/stem.755.

Concise review: Pluripotency and the transcriptional inactivation of the female Mammalian X chromosome.

Author information

1
Department of Biological Chemistry, Jonsson Comprehensive Cancer Center, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.

Abstract

X chromosome inactivation (XCI) is a striking example of developmentally regulated, wide-range heterochromatin formation that is initiated during early embryonic development. XCI is a mechanism of dosage compensation unique to placental mammals whereby one X chromosome in every diploid cell of the female organism is transcriptionally silenced to equalize X-linked gene levels to XY males. In the embryo, XCI is random with respect to whether the maternal or paternal X chromosome is inactivated and is established in epiblast cells on implantation of the blastocyst. Conveniently, ex vivo differentiation of mouse embryonic stem cells recapitulates random XCI and permits mechanistic dissection of this stepwise process that leads to stable epigenetic silencing. Here, we focus on recent studies in mouse models characterizing the molecular players of this female-specific process with an emphasis on those relevant to the pluripotent state. Further, we will summarize advances characterizing XCI states in human pluripotent cells, where surprising differences from the mouse process may have far-reaching implications for human pluripotent cell biology.

PMID:
21997775
PMCID:
PMC3251695
DOI:
10.1002/stem.755
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Wiley Icon for PubMed Central
    Loading ...
    Support Center