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DNA methylation in the context of epigenetics occurs on the 5' position of cytosine, which can be further oxidized by enzymes from the Ten-eleven translocation (Tet) family, resulting in 5-hydroxymethylcytosine (5-hmC). In the context of embryonic stem cells, Tet and 5-hmC DNA act in an alternate epigenetic state that regulates epigenetic programming and stem cell differentiation. Here, the authors describe the epigenomic profiling of 5-hmC in mouse and human brain across different time periods during development and aging.
It has been unclear how extensively neuronal DNA methylome is regulated by activity. In this resource article, the authors use next-generation sequencing methods and quantitatively compare the CpG methylation landscape of adult mouse dentate granule neurons in vivo before and after synchronous neuronal activation.
