X chromosome inactivation: how human are mice?
Cytogenetic and Genome Research2002Vol. 99(1-4), pp. 30–35
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Abstract
Mammals perform dosage compensation of X-linked gene products between XY males and XX females by transcriptionally silencing all but one X chromosome per diploid cell, a process called X chromosome inactivation (XCI). XCI involves counting X chromosomes in a cell, random or imprinted choice of one X to remain active, initiation and spread of the inactivation signal in CIS throughout the other X chromosomes, and maintenance of the inactive state of those X chromosomes during cell divisions thereafter. Most of what is known of the molecular mechanisms involved in the different steps of XCI has been studied in the mouse. In this review we compare XCI in mouse and human, and discuss how much of the murine data can be extrapolated to humans.
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