The Effects of Polyadenylation Status on MPFs During In Vitro Porcine Oocyte Maturation

文献类型: 外文期刊

第一作者: Liu, Huiyu

作者: Liu, Huiyu;Gao, Yan;Jiang, Hao;Ding, Yu;Deng, Qiong;Yu, Xianfeng;Zhang, Jiabao;Zhai, Bo;Zhang, Lianjiang;Li, Changhong;Zhang, Jiabao

作者机构:

关键词: Porcine oocyte;Polyadenylation;Maturation;Maternal gene;Chromosome alignment

期刊名称:CELLULAR PHYSIOLOGY AND BIOCHEMISTRY ( 影响因子:5.5; 五年影响因子:4.354 )

ISSN: 1015-8987

年卷期: 2016 年 39 卷 5 期

页码:

收录情况: SCI

摘要: Aims: This study aims to clarify the effects of polyadenylation status on M-phase promoting factors (MPFs) during in vitro porcine oocyte maturation. Methods: In this study, porcine follicular oocytes from large follicles (> 5 millimeter (mm)) and small follicles (< 3 mm) were examined at different follicular developmental stages. The polyadenylation of maternal mRNAs was inhibited by the addition of 3'-deoxyadenosine (3'-da) during the germinal vesicle (GV)(0 h), GV breakdown (GVBD)(18 h), metaphase I (MI)(28 h), and metaphase II (MII) (44 h) stages. In addition, the expression levels and poly-(A) tail lengths of the maternal mRNAs Cyclin 81 and cell division cycle 2 (Cdc2) were determined by real-time quantitative PCR. Immunofluorescence was used to assess spindle formation and chromosome alignment in the examined oocytes. Results: In large-follicle oocytes, the effects of inhibiting polyadenylation caused the percentage of mature to be significantly lower for the treated group than for the untreated group (p < 0.01). 3'-da can significantly improve the rate of small oocyte maturation in vitro and inhibits Cdc2 polyadenylation. Cyclin 81 plays a significant role in promoting the maturation of large-follicle oocytes. Polyadenylation contributes to the formation of dominant follicles and facilitates the selection of dominant follicles. However, the inhibition of adenylation affected spindle formation-related propulsion and chromosome alignment in both large- and small-follicle oocytes. The first polar body could not be extruded in certain large follicles. Conclusions: 3'-da can significantly improve the rate of small oocyte maturation in vitro, but it can also affect spindle formation-related propulsion and chromosome alignment. (C) Copyright 2016 S. Karger AG, Basel

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