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Epigenetic changes in the myelodysplastic syndrome Issa JPHematol Oncol Clin North Am 2010[Apr]; 24 (2): 317-30Epigenetic mechanisms, such as DNA methylation and histone modifications, drive stable, clonally propagated changes in gene expression and can therefore serve as molecular mediators of pathway dysfunction in neoplasia. Myelodysplastic syndrome (MDS) is characterized by frequent epigenetic abnormalities, including the hypermethylation of genes that control proliferation, adhesion, and other characteristic features of this leukemia. Aberrant DNA hypermethylation is associated with a poor prognosis in MDS that can be accounted for by more rapid progression to acute myeloid leukemia. In turn, treatment with drugs that modify epigenetic pathways (DNA methylation and histone deacetylation inhibitors) induces durable remissions and prolongs life in MDS, offering some hope and direction in the future management of this deadly disease.|*Epigenesis, Genetic/drug effects[MESH]|Acetylation/drug effects[MESH]|Acute Disease[MESH]|Azacitidine/analogs & derivatives/therapeutic use[MESH]|Cell Transformation, Neoplastic/drug effects[MESH]|DNA Methylation/drug effects[MESH]|Decitabine[MESH]|Histone Deacetylase Inhibitors/therapeutic use[MESH]|Histone Deacetylases/physiology[MESH]|Histones/metabolism[MESH]|Humans[MESH]|Leukemia, Myeloid/etiology/prevention & control[MESH]|Methylation[MESH]|Myelodysplastic Syndromes/drug therapy/*genetics[MESH]|Neoplasms/genetics/metabolism[MESH]|Protein Processing, Post-Translational/drug effects[MESH] |
