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Toward a Discipline of Pharmacoepigenomics

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This review argues that the epigenome, which plays a critical role in controlling gene expression, plays also an important role in drug responsiveness. The epigenome is composed of chromatin and its modifications and DNA methylation. DNA methylation and chromatin structure are dynamic and tightly linked. Alterations in DNA methylation are involved in the pathology of cancer and in normal aging. It is suggested here that pharmacoepigenomics should be recognized as a new field in pharmacology. This field will address the epigenomic basis of issues which were traditionally the focus of pharmacogenetics and pharmacogenomics such as inter-individual differences in drug responsiveness, the impact of drugs on gene expression profiles, identification of unpredicted side effects of drugs at early stages of preclinical development and the discovery of novel drug targets. The reversibility of epigenetic states presents therapeutic and prophylactic opportunities, which necessitate the development of drugs that target the epigenomic machinery. Such drugs might be of therapeutic value in cancer and other diseases and in promoting and altering drug responsiveness.
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Keywords: chromatin structure; dna methylation; dna methyltransferase; drug-responsiveness; epigenomic states; gene silencing; histone acetylation; histone deacetylases; histone methylation; methylated dna binding proteins

Document Type: Review Article

Affiliations: Department of Pharmacology and Therapeutics, McGill University, 3655 Sir William Promenade, Montreal, Quebec H3G 1Y6, Canada.

Publication date: December 1, 2004

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  • Current Pharmacogenomics provides comprehensive overviews of all current research on pharmacogenomics and pharmacogenetics. All areas of the field from pre-clinical to clinical research are covered, including related areas such as genomics, proteomics, target discovery, bioinformatics and novel diagnostics. This international journal is peer-reviewed and publishes both mini- and full review articles.

    The journal has become essential reading for all researchers and clinicians with interests in pharmacogenomics and pharmacogenetics.
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