Role and action mechanisms of miR-149 and miR-31 in regulating function of pig cumulus cells and oocytes
文献类型： 外文期刊
作者： Wu, Jia-Shun 1 ; Gong, Shuai 1 ; Zhang, Min 1 ; Ma, Rui-Jie 1 ; Wang, Hui-Li 2 ; Luo, Ming-Jiu 1 ; He, Nan 1 ; Tan, Jing-He 1 ;
作者机构： 1.Shandong Agr Univ, Coll Anim Sci & Vet Med, Tai An 271018, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Anim Sci, Nanjing 210014, Peoples R China
关键词： miRNA; TGF-beta signaling; Cumulus expansion; Apoptosis; Developmental potential; Pig oocytes
期刊名称：THERIOGENOLOGY （ 影响因子：2.8； 五年影响因子：2.6 ）
ISSN： 0093-691X
年卷期： 2024 年 220 卷
页码：
收录情况： SCI
摘要： Understanding the mechanisms for oocyte maturation and optimizing the protocols for in vitro maturation (IVM) are greatly important for improving developmental potential of IVM oocytes. The miRNAs expressed in cumulus cells (CCs) play important roles in oocyte maturation and may be used as markers for selection of competent oocytes/embryos. Although a recent study from our group identified several new CCs -expressed miRNAs that regulate cumulus expansion (CE) and CC apoptosis (CCA) in mouse oocytes, validation of these findings and further investigation of mechanisms of action in other model species was essential before wider applications. By using both in vitro and in vivo pig oocyte models with significant differences in CE, CCA and developmental potential, the present study validated that miR-149 and miR-31 improved CE and developmental potential while suppressing CCA of pig oocytes. We demonstrated that miR-149 and miR-31 targeted SMAD family member 6 (SMAD6) and transforming growth factor beta 2 (TGFB2), respectively, in the transforming growth factor-beta (TGF-beta) signaling. Furthermore, both miR-149 and miR-31 increased CE and decreased CCA via activating SMAD family member 2 (SMAD2) and increasing the expression of SMAD2 and SMAD family member 4. In conclusion, the present results show that miR-149 and miR-31 improved CE and developmental potential while suppressing CCA of pig oocytes by activating the TGF-beta signaling, suggesting that they might be used as markers for pig oocyte quality.
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