Journal
EUROPEAN JOURNAL OF MEDICAL GENETICS
Volume 52, Issue 6, Pages 363-372Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejmg.2009.07.004
Keywords
Epigenetics; Rett; ICF; ATRX; Coffin-Lowry; Rubinstein-Taybi
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Funding
- Fondation jerome Lejeune
- Ligue contre le Cancer (Comite Herault et Lozere)
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Epigenetics is the study of heritable changes in gene expression that occur without a change in the DNA sequence. Most constitutional defects in genes encoding components of the machinery that regulates the epigenome lead to embryonic death. Hypomorphic mutations may be compatible with life, but lead to severe developmental disorders. Their study is of great importance to our understanding of epigenetics and may clarify the interplay between different epigenetic mechanisms. This review will briefly introduce DNA methylation, post-translational histone modifications, and non-coding small RNA transcription, which are the best known epigenetic mechanisms. Then it will describe five human disorders (RETT, ATRX, ICF, Coffin-Lowry, and Rubinstein-Taybi) resulting from mutations in genes responsible for DNA methylation and in genes involved in chromatin remodeling. Finally, it will discuss how research in medical genetics can elucidate fundamental epigenetic processes. (C) 2009 Elsevier Masson SAS. All rights reserved.
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