期刊
GENES & DEVELOPMENT
卷 25, 期 10, 页码 1035-1040出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.2039011
关键词
nuclear reprogramming; iPSCs; de novo DNA methylation; Dnmt3a; Dnmt3b
资金
- Ernst Schering Foundation
- NIH [R01-HD045022, R01-CA087869]
Induced pluripotent stem cells (iPSCs) are generated from somatic cells by the transduction of defined transcription factors, and this process involves dynamic changes in DNA methylation. While the reprogramming of somatic cells is accompanied by demethylation of pluripotency genes, the functional importance of de novo DNA methylation has not been clarified. Here, using loss-of-function studies, we generated iPSCs from fibroblasts that were deficient in de novo DNA methylation mediated by Dnmt3a and Dnmt3b. These iPSCs reactivated pluripotency genes, underwent self-renewal, and showed restricted developmental potential that was rescued upon reintroduction of Dnmt3a and Dnmt3b. We conclude that de novo DNA methylation by Dnmt3a and Dnmt3b is dispensable for nuclear reprogramming of somatic cells.
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