期刊
JOURNAL OF MOLECULAR HISTOLOGY
卷 52, 期 5, 页码 965-973出版社
SPRINGER
DOI: 10.1007/s10735-021-10014-0
关键词
Eukaryotic translation initiation factor 1A; Preimplantation; Embryo; Zygotic genome activation; Blastocyst formation
类别
资金
- National Natural Science Foundation of China [81671526]
- Fujian Provincial Science and Technology Innovation Joint Fund Project [2017Y9114]
- Startup Foundation of Fujian Medical University [2017XQ2010]
This study revealed the important role of eIF1A in early mouse preimplantation embryo development. Knockdown of eIF1A affected blastocyst formation rate, down-regulated CDX2 protein expression level, and decreased Hsp70.1 mRNA expression level in 2-cell embryos.
Preimplantation embryo development is characterized by drastic nuclear reprogramming and dynamic stage-specific gene expression. Key regulators of this earliest developmental stage have not been revealed. In the present study, a non-classical nuclear-localization pattern of eIF1A was observed during early developmental stages of mouse preimplantation embryo before late-morula. In particular, eIF1A is most highly expressed in the nuclear of 2-cell embryo. Knockdown eIF1A by siRNA microinjection affected the development of mouse preimplantation embryo, resulted in decreased blastocyst formation rate. CDX2 protein expression level significantly down-regulated after eIF1A knockdown in morula stage. In addition, the mRNA expression level of Hsp70.1 was also decreased in 2-cell embryo. The results indicate an indispensable role of eIF1A in mouse preimplantation embryos.
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