The miR-125 family is an important regulator of the expression and maintenance of maternal effect genes during preimplantational embryo development.

The miR-125 family is an important regulator of the expression and maintenance of maternal effect genes during preimplantational embryo development.
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DOI:
10.1098/rsob.160181
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发表时间:
2016-11
期刊:
影响因子:
5.8
通讯作者:
Lee KA
Lee KA
中科院分区:
生物学2区
文献类型:
--
作者:
Kim KH;Seo YM;Kim EY;Lee SY;Kwon J;Ko JJ;Lee KA

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在此之前,我们报道了Sebox是一种新的母体效应基因(MEG),它是超过两细胞(2C)阶段的早期胚胎发育所必需的,因为该基因协调了合子基因组激活(ZGA)重要基因的表达。然而,Sebox表达的调控因子仍然未知。因此,本研究的目的是使用生物信息学工具来鉴定这些调控microrna (mirna),并确定鉴定的microrna对Sebox表达的影响。使用计算算法,我们在Sebox mRNA的3'UTR中发现了一个基序,该基序是miR-125家族种子区特有的,包括miR-125a-5p, miR-125b-5p和miR-351-5p。在我们寻找mirna的过程中,我们发现Lin28a 3'UTR也含有与miR-125家族种子区相同的结合基序。此外,我们证实Lin28a也发挥MEG的作用,在2C阶段影响ZGA,但不影响卵母细胞成熟或受精。因此,我们提供了第一份报告,表明miR-125家族通过影响卵母细胞和胚胎中的Sebox和Lin28a等方法,在调节与2C阻滞相关的meg和调节ZGA中起着至关重要的作用。
Previously, we reported that Sebox is a new maternal effect gene (MEG) that is required for early embryo development beyond the two-cell (2C) stage because this gene orchestrates the expression of important genes for zygotic genome activation (ZGA). However, regulators of Sebox expression remain unknown. Therefore, the objectives of the present study were to use bioinformatics tools to identify such regulatory microRNAs (miRNAs) and to determine the effects of the identified miRNAs on Sebox expression. Using computational algorithms, we identified a motif within the 3′UTR of Sebox mRNA that is specific to the seed region of the miR-125 family, which includes miR-125a-5p, miR-125b-5p and miR-351-5p. During our search for miRNAs, we found that the Lin28a 3′UTR also contains the same binding motif for the seed region of the miR-125 family. In addition, we confirmed that Lin28a also plays a role as a MEG and affects ZGA at the 2C stage, without affecting oocyte maturation or fertilization. Thus, we provide the first report indicating that the miR-125 family plays a crucial role in regulating MEGs related to the 2C block and in regulating ZGA through methods such as affecting Sebox and Lin28a in oocytes and embryos.
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