Mir-483-3p, Mediated by KLF9, Functions as Tumor Suppressor in Testicular Seminoma via Targeting MMP9 [post]

Lei Zhang, Yashi Ruan, Xian Gao, Kai Xu, Xiaokai Shi, Zhiqiang Qin, Lifeng Zhang, Li Zuo, Wei Zhang
2020 unpublished
Background: Seminoma (SEM) is the most frequent testicular germ cell tumor with a high incidence in young men. The present study aims to explore the function and regulatory mechanism of miR-483-3p in SEM.Methods: RT-qPCR was performed to investigate miR-483-3p levels in SEM tissues. The effect of miR-483-3p on TCam-2 cells was assessed by CCK-8, colony formation, cell migration and invasion assays. Luciferase reporter assays were performed to investigate the interaction between miR-483-3p and
more » ... en miR-483-3p and MMP9 and then the recovery experiments were performed. Moreover, the potential upstream regulator of miR-483-3p was predicted based on JASPAR database.Results: miR-483-3p was down‐regulated in SEM tissues versus paracancerous normal tissues. The expression level of miR-483-3p was significantly associated with tumor stage by RT-qPCR. Functionally, miR-483-3p over-expression suppressed cell growth, migration and invasion in SEM cell lines. Mechanically, miR-483-3p negatively regulated MMP9 by directly binding to its 3'-UTR. The over-expression of miR-483-3p could reverse the promoting role of MMP9 over-expression on the proliferation, migration and invasion of TCam-2 cells. Moreover, KLF9 was identified as a potential upstream regulator of miR-483-3p and functions as a tumor suppressor.Conclusions: In general, our study suggested that miR-483-3p could inhibit the cell growth, migration and invasion of testicular SEM by targeting MMP9. Moreover, KLF9 is an upstream positive regulator of miR-483-3p and also functions as a tumor suppressor in SEM.
doi:10.21203/rs.3.rs-84433/v1 fatcat:uez6n7yrjze3phjvqp4evfzlqm