Abstract:
:Genome-wide DNA methylation reprogramming occurs in mouse primordial germ cells (PGCs) and preimplantation embryos, but the precise dynamics and biological outcomes are largely unknown. We have carried out whole-genome bisulfite sequencing (BS-Seq) and RNA-Seq across key stages from E6.5 epiblast to E16.5 PGCs. Global loss of methylation takes place during PGC expansion and migration with evidence for passive demethylation, but sequences that carry long-term epigenetic memory (imprints, CpG islands on the X chromosome, germline-specific genes) only become demethylated upon entry of PGCs into the gonads. The transcriptional profile of PGCs is tightly controlled despite global hypomethylation, with transient expression of the pluripotency network, suggesting that reprogramming and pluripotency are inextricably linked. Our results provide a framework for the understanding of the epigenetic ground state of pluripotency in the germline.
journal_name
Mol Celljournal_title
Molecular cellauthors
Seisenberger S,Andrews S,Krueger F,Arand J,Walter J,Santos F,Popp C,Thienpont B,Dean W,Reik Wdoi
10.1016/j.molcel.2012.11.001subject
Has Abstractpub_date
2012-12-28 00:00:00pages
849-62issue
6eissn
1097-2765issn
1097-4164pii
S1097-2765(12)00932-Xjournal_volume
48pub_type
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