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In mouse embryos, some primordial germ cells (PGCs) are eliminated by apoptosis, but the molecular pathways that lead to PGC survival versus apoptosis have not been fully characterized. Here, we found that REST (repressor element 1-silencing transcription factor), a transcription factor that binds a conserved regulatory element, NRSE/RE1, played a role in PGC survival. REST expression was higher in...
In mammalian embryos, PGCs (primordial germ cells) are specified from a pluripotent epiblast cell population after implantation. In this study, we demonstrated an essential role for the germline-specific transcription factor Oct3/4 in PGC specification. We generated chimeric embryos with ZHBTc4 ES cells lacking both alleles of the Oct3/4 gene (pou5f1). Pluripotency was maintained by an Oct3/4 transgene,...
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