文献类型： 外文期刊

作者： Guo Zhenhua ¹ ; Rajput, Sandeep K. ² ; Folger, Joseph K. ² ; Liu Di ¹ ; Knott, Jason G. ³ ; Smith, George W. ² ;

作者机构： 1.HAAS, Anim Husb Res Inst, Harbin, Peoples R China

2.Michigan State Univ, Lab Mammalian Reprod Biol & Genom, E Lansing, MI 48824 USA

3.Michigan State Univ, Dept Anim Sci, E Lansing, MI 48824 USA

4.Michigan State Univ, Dev Epigenet Lab, E Lansing, MI 48824 USA

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2017 年 12 卷 1 期

页码：

收录情况： SCI

摘要： Our previous studies demonstrated that maternal (oocyte derived) follistatin (FST) expression is positively associated with bovine oocyte competence and exogenous follistatin treatment during the pre-compaction period of development (d 1-3 post insemination) is stimulatory to bovine early embryogenesis in vitro [blastocyst rates and cell numbers/allocation to trophectoderm (TE)]. In the present study, bovine embryos were treated with exogenous follistatin during d 1-3, d 4-7 and d 1-7 post insemination to test the hypothesis that embryotropic effects of exogenous follistatin are specific to the pre-compaction period (d 1-3) of early embryogenesis. Follistatin treatment during d 4-7 (peri-/post-compaction period) of embryo culture increased proportion of embryos reaching blastocyst and expanded blastocyst stage and total cell numbers compared to controls, but blastocyst rates and total cell numbers were lower than observed following d 1-3 (pre-compaction) follistatin treatment. Follistatin supplementation during d 1-7 of embryo culture increased development to blastocyst and expanded blastocyst stages and blastocyst total cell numbers compared to d 1-3 and d 4-7 follistatin treatment and untreated controls. A similar increase in blastocyst CDX2 mRNA and protein (TE cell marker) was observed in response to d 1-3, d 4-7 and d 1-7 follistatin treatment. However, an elevation in blastocyst BMP4 protein (TE cell regulator) was observed in response to d 1-3 and d 1-7, but not d 4-7 (peri-/post-compaction) follistatin treatment. In summary, our study revealed the potential utility of follistatin treatment for increasing the success rate of in vitro embryo production in cattle. Such results also expand our understanding of the embryotropic actions of follistatin and demonstrate that follistatin actions on blastocyst development and cell allocation to the TE layer are not specific to the pre-compaction period.