Wild-type p53-induced phosphatase 1 (WIP1) regulates the proliferation of swine Sertoli cells through P53
Bingyuan Wang
A * , Mingrui Zhang A B * , Jingjing Che A , Kui Li A , Yulian Mu A C and Zhiguo Liu A C
+ Author Affiliations
- Author Affiliations
A Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
B College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
C Corresponding authors. Email: mouyulian@caas.cn; liuzhiguo@caas.cn
Reproduction, Fertility and Development 32(18) 1350-1356 https://doi.org/10.1071/RD20215
Submitted: 19 August 2020 Accepted: 29 October 2020 Published: 8 December 2020
Abstract
Wild-type p53-induced phosphatase 1 (WIP1) plays an oncogenic function by increasing cell proliferation in various cancer types. Deficiency in WIP1 expression leads to male infertility, possibly by impairing the blood–testis barrier and spermatogenesis. However, how WIP1 functions in the Sertoli cells to affect male reproduction remains unclear. Thus, in the present study we used a swine Sertoli cell line to investigate whether WIP1 regulated the proliferation of Sertoli cells to participate in male reproduction. The WIP1 inhibitor GSK2830371, WIP1-short interference (si) RNAs and an upstream microRNA (miR-16) were used to inhibit the expression of WIP1, after which the proliferation of swine Sertoli cells, P53 expression and the levels of P53 phosphorylation were determined. Inhibiting WIP1 expression suppressed swine Sertoli cell proliferation, increased P53 expression and increased levels of P53 phosphorylation. In addition, overexpression of miR-16 in swine Sertoli cells resulted in a decrease in WIP1 expression and increases in both P53 expression and P53 phosphorylation. Together, these findings suggest that WIP1 positively regulates the proliferation of swine Sertoli cells by inhibiting P53 phosphorylation, and the miR-16 is likely also involved by targeting WIP1.
Keywords: miR-16, P53, proliferation, swine Sertoli cells, wild-type p53-induced phosphatase 1 (WIP1).
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