The focus of the laboratory is on the role of epigenetic modifications in normal cellular homestasis, differentiation, and tumor progression. Epigenetic modifications of the genome, such as DNA methylation, are not encoded by the DNA sequence, but are imposed by enzymes post-replicatively. These modifications (DNA methylation, histone methylation and acetylation) are potent regulators of transcription and chromatin structure in mammalian cells. We are particularly interested in studying how these enzymes (DNA methyltransferases for example) are regulated in normal cells and how they become dysregulated in tumor cells, since aberrant DNA methylation patterns are one of the hallmarks of transformed cells. Current projects in the lab include (1) identification of novel aberrantly methylated genes in tumor cells using microarray methods, (2) characterizing the role of the epigenetic modification machinery in differentiation using murine embryonic stem cells as a model system, and (3) isolating and characterizing protein complexes in which the DNA methyltransferases reside. |
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