MiR-191 promotes the porcine immature Sertoli cell proliferation by targeting the BDNF gene through activating the PI3K/AKT signaling pathway
Received date: 2021-04-25
Revised date: 2021-06-02
Online published: 2021-06-11
Supported by
Supported by the Natural Science Foundation of Hunan Province No(2020JJ4348);the Key Research and Development Plan Projects of Hunan ProvinceNo(2020NK2024);the Project from Porcine Industry and Technology System of Hunan Province
The number of Sertoli cells in the testis is a major regulator on the sperm production capacity. MicroRNAs (miRNAs) participate in regulating the proliferation and apoptosis of porcine immature Sertoli cells. However, the functions and mechanisms of action of most identified miRNAs in porcine Sertoli cells remain largely unknown. In the present study, based on our previous results from an EdU-based high-content screening assay, we further studied the mechanism of action of miR-191 on the proliferation and apoptosis of porcine immature Sertoli cells through flow cytometry, Western blotting, and dual-luciferase activity analyses. The results demonstrated that overexpression of miR-191 promoted cell cycle progression from G1 phase to the S and G2 phases, enhanced cell proliferation, and inhibited apoptosis in the porcine immature Sertoli cells, whereasmiR-191 inhibition resulted in the opposite effects. The results from a luciferase reporter assay showed that miR-191 directly targeted the 3′-UTR of theBDNF gene. BDNF knockdown also promoted cell cycle progression to the S phase, cell proliferation and inhibited cell apoptosis, which were consistent with the effects of the miR-191overexpression. A co-transfection experiment showed that BDNF knockdown abolished the effects of miR-191 inhibition. Furthermore, both miR-191 overexpression and BDNFinhibition elevated the phosphorylation of PI3K and AKT, the key components of the PI3K/AKT signaling pathway, whereas BDNFinhibition offset the effects of the miR-191 knockdown. Overall, these data indicated that miR-191 promotes cell proliferation and inhibits apoptosis in porcine immature Sertoli cells by targeting theBDNF gene through activating the PI3K/AKT signaling pathway. This study provides a novel scientific basis for further investigation on the biological functions of miR-191 on porcine spermatogenesis.
Key words： miR-191; BDNF gene; PI3K/AKT signaling pathway; proliferation; porcine Sertoli cells
Xiangwei Tang, Dan Chu, Saina Yan, Yanfei Yin, Qiao Bian, Bo Weng, Bin Chen, Maoliang Ran . MiR-191 promotes the porcine immature Sertoli cell proliferation by targeting the BDNF gene through activating the PI3K/AKT signaling pathway[J]. Hereditas(Beijing), 2021 , 43(7) : 680 -693 . DOI: 10.16288/j.yczz.21-154
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