Autophagy is essential for preimplantation development of mouse embryos - PubMed (original) (raw)
. 2008 Jul 4;321(5885):117-20.
doi: 10.1126/science.1154822.
Affiliations
- PMID: 18599786
- DOI: 10.1126/science.1154822
Autophagy is essential for preimplantation development of mouse embryos
Satoshi Tsukamoto et al. Science. 2008.
Abstract
After fertilization, maternal proteins in oocytes are degraded and new proteins encoded by the zygotic genome are synthesized. We found that autophagy, a process for the degradation of cytoplasmic constituents in the lysosome, plays a critical role during this period. Autophagy was triggered by fertilization and up-regulated in early mouse embryos. Autophagy-defective oocytes derived from oocyte-specific Atg5 (autophagy-related 5) knockout mice failed to develop beyond the four- and eight-cell stages if they were fertilized by Atg5-null sperm, but could develop if they were fertilized by wild-type sperm. Protein synthesis rates were reduced in the autophagy-null embryos. Thus, autophagic degradation within early embryos is essential for preimplantation development in mammals.
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