miR-181a promotes porcine granulosa cell apoptosis by targeting TGFBR1 via the activin signaling pathway

文献类型: 外文期刊

第一作者: Zhang, Jia-Qing

作者: Zhang, Jia-Qing;Gao, Bin-Wen;Guo, Hong-Xia;Ren, Qiao-Ling;Chen, Jun-Feng;Wang, Jing;Zhang, Zi-Jing;Ma, Qiang;Xing, Bao-Song;Zhang, Jia-Qing;Gao, Bin-Wen;Guo, Hong-Xia;Ren, Qiao-Ling;Chen, Jun-Feng;Wang, Jing;Zhang, Zi-Jing;Ma, Qiang;Xing, Bao-Song;Wang, Xian-Wei

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关键词: miR-181a; Porcine granulosa cell; Apoptosis; TGFBR1; TGF-beta signaling

期刊名称:MOLECULAR AND CELLULAR ENDOCRINOLOGY ( 影响因子:4.102; 五年影响因子:4.226 )

ISSN: 0303-7207

年卷期: 2020 年 499 卷

页码:

收录情况: SCI

摘要: Activin/Smad3 signaling plays a pivotal role in follicle development and atresia. However, the precise mechanisms underlying this process are not yet fully understood. Herein, we identified miR-181a as a central component of activin/Smad3-mediated follicle atresia. miR-181a was strikingly upregulated in porcine atretic follicles, which induced the apoptosis of porcine granulosa cells (GCs) in vitro. Furthermore, the transforming growth factor-beta type 1 receptor (TGFBR1) was confirmed as a direct target of miR-181a by bioinformatics analysis and luciferase assays. Transfection with an miR-181a agomir repressed the TGFBR1 mRNA and protein levels. In addition, TGFBR1 overexpression repressed GC apoptosis, whereas TGFBR1 inhibition promoted GC apoptosis. miR-181a overexpression downregulated the phosphorylation of Smad3 and blocked the activation of TGF-beta signaling. Moreover, activin A downregulated miR-181a expression and upregulated the TGFBR1 and p-Smad3 protein levels. Collectively, these data suggest that miR-181a regulates porcine GC apoptosis by targeting TGFBR1 via the activin signaling pathway.

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