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Human Molecular Genetics Advance Access published online on December 22, 2004
Human Molecular Genetics, doi:10.1093/hmg/ddi046
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Human Molecular Genetics © Oxford University Press 2004; all rights reserved

Article

Onset and inheritance of abnormal epigenetic regulation in hematopoietic cells

Stefania Bottardi 1, Vincent Bourgoin 1, Natacha Pierre-Charles 1, and Eric Milot 1*

1 Guy-Bernier Research Centre, Maisonneuve-Rosemont Hospital and Faculty of Medicine, University of Montreal, 5415 boulevard l'Assomption, Montreal, Quebec, Canada, H1T 2M4

* To whom correspondence should be addressed.
Eric Milot, E-mail: eric.milot{at}hmr.qc.ca


  Abstract

Abnormal epigenetic regulation of gene expression contributes significantly to a variety of human pathologies including cancer. Deletion of hypersensitive site 2 (HS2) at the human {beta}-globin locus control region can lead to abnormal epigenetic regulation of globin genes in transgenic mice. Here, two HS2-deleted transgenic mouse lines were used as model to demonstrate that heritable alteration of chromatin organization at the human {beta}-globin locus in multipotent hematopoietic progenitors contributes to the abnormal expression of the {beta}-globin gene in mature erythroid cells. This alteration is characterized by specific patterns of histone covalent modifications that are inherited during erythropoiesis and, moreover, is plastic since it can be reverted by transient treatment with the histone deacetylase inhibitor Trichostatin A. Together our results indicate that aberrant epigenetic regulation can be detected and modified before tissue-specific gene transcription, a finding which may lead to novel strategies for the prevention of chromatin-related pathologies.


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[Abstract] [Full Text] [PDF]


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