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DNA methylation and chromatin structure patterns are tightly linked components of the epigenome, which regulate gene expression programming. Two contradictory changes in DNA methylation patterns are observed in breast cancer; regional hypermethylation of specific genes and global hypomethylation. It is proposed here that independent mechanisms are responsible for these alterations in DNA methylation...
The epigenome, which is comprised of chromatin and its associated proteins and the patterns of covalent modification of DNA by methylation, sets up and maintains gene expression programs. A hallmark of cancer is a paradoxical aberration of DNA methylation patterns, a global loss of DNA methylation, that coexists with regional hypermethylation of certain genes. The hypermethylation of tumor-suppressor...
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