Whole-genome bisulfite sequencing of two distinct interconvertible DNA methylomes of mouse embryonic stem cells.


The use of two kinase inhibitors (2i) enables derivation of mouse embryonic stem cells (ESCs) in the pluripotent ground state. Using whole-genome bisulfite sequencing (WGBS), we show that male 2i ESCs are globally hypomethylated compared to conventional ESCs maintained in serum. In serum, female ESCs are hypomethyated similarly to male ESCs in 2i, and DNA methylation is further reduced in 2i. Regions with elevated DNA methylation in 2i strongly correlate with the presence of H3K9me3 on endogenous retroviruses (ERVs) and imprinted loci. The methylome of male ESCs in serum parallels postimplantation blastocyst cells, while 2i stalls ESCs in a hypomethylated, ICM-like state. WGBS analysis during adaptation of 2i ESCs to serum suggests that deposition of DNA methylation is largely random, while loss of DNA methylation during reversion to 2i occurs passively, initiating at TET1 binding sites. Together, our analysis provides insight into DNA methylation dynamics in cultured ESCs paralleling early developmental processes.

DOI: 10.1016/j.stem.2013.06.002

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@article{Habibi2013WholegenomeBS, title={Whole-genome bisulfite sequencing of two distinct interconvertible DNA methylomes of mouse embryonic stem cells.}, author={Ehsan Habibi and Arie B. Brinkman and Julia Arand and Leonie I. Kroeze and Hindrik H. D. Kerstens and Filomena Matarese and Konstantin Lepikhov and Marta Gut and Isabelle Brun-Heath and Nina C . Hubner and Rosaria Benedetti and Lucia Altucci and Joop Jansen and J{\"{o}rn Walter and Ivo G Gut and Hendrik Marks and Hendrik G. Stunnenberg}, journal={Cell stem cell}, year={2013}, volume={13 3}, pages={360-9} }