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2014 ; 14
(6
): 710-9
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Reprogramming the methylome: erasing memory and creating diversity
#MMPMID24905162
Lee HJ
; Hore TA
; Reik W
Cell Stem Cell
2014[Jun]; 14
(6
): 710-9
PMID24905162
show ga
The inheritance of epigenetic marks, in particular DNA methylation, provides a
molecular memory that ensures faithful commitment to transcriptional programs
during mammalian development. Epigenetic reprogramming results in global
hypomethylation of the genome together with a profound loss of memory, which
underlies naive pluripotency. Such global reprogramming occurs in primordial germ
cells, early embryos, and embryonic stem cells where reciprocal molecular links
connect the methylation machinery to pluripotency. Priming for differentiation is
initiated upon exit from pluripotency, and we propose that epigenetic mechanisms
create diversity of transcriptional states, which help with symmetry breaking
during cell fate decisions and lineage commitment.