Genetic and epigenetic control of early mouse development

被引:72
作者
Albert, Mareike [1 ]
Peters, Antoine H. F. M. [1 ]
机构
[1] Friedrich Miescher Inst Biomed Res, CH-4058 Basel, Switzerland
关键词
EMBRYONIC STEM-CELLS; TRANSCRIPTIONAL REGULATORY CIRCUITRY; SELF-RENEWAL; DNA METHYLATION; PREIMPLANTATION EMBRYOS; ES CELLS; PLURIPOTENCY; TROPHECTODERM; POLYCOMB; CHROMATIN;
D O I
10.1016/j.gde.2009.03.004
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
A decade after cloning the sheep Dolly, the induction of pluripotency by transcription factors has further revolutionized the possibilities of reprogramming a cell's identity, with exciting prospects for personalized medicine. Establishing totipotency during natural reproduction remains, however, exceedingly more efficient than in reproductive cloning or in transcription factor-based reprogramming. Understanding the molecular mechanisms directing acquisition of totipotency during early embryogenesis may enable optimization of protocols for induced reprogramming. Recent studies in mouse embryonic stem cells (ESCs) show that self-renewal and pluripotency are efficiently maintained by a core set of transcription factors when intrinsic differentiation inducing signals are blocked. In early embryos, the specification of the pluripotent epiblast and two differentiating lineages (trophectoderm and primitive endoderm) is controlled by transcription factors that are regulated by autoactivating and reciprocal repressive mechanisms as well as by ERK-mediated signaling. Chromatin-based regulatory mechanisms also contribute to the identity of ESCs and early embryos. During gametogenesis, genomes undergo extensive epigenetic reprogramming. This may underlie the efficient acquisition of totipotency during subsequent preimplantation development.
引用
收藏
页码:113 / 121
页数:9
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