作者: Toshinobu Nakamura , Toru Nakano
DOI: 10.1007/978-3-642-31974-7_2
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摘要: The development of a mouse begins after fertilization, the fusion ovulated oocyte with sperm. During preimplantation embryo, parental genomes undergo extensive epigenetic reprogramming, including genome-wide DNA demethylation. Shortly methylation paternal genome is rapidly removed by replication-independent process. In contrast, maternal reduced gradually, in replication-dependent manner. Thus, status quite different between and zygote stage; this difference called “epigenetic asymmetry.” Recent studies have revealed that factor Stella (also known as PGC7 Dppa3, “developmental pluripotency-associated 3”) required for both maintenance some imprinted genes retrotransposons establishment asymmetry zygotes.