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MicroRNA-20a Targeting LASS2 Promotes the Proliferation, Invasiveness and Migration of Bladder Cancer by Shiwei Xiao, Yujin Chen, Ting Luan, Yinglong Huang, Shi Fu, Yigang Zuo, Haifeng Wang, Jiansong Wang

Background: Abnormal expression of miR 20a is reported in various types of malignancy neoplasms. However, its function is not consistent in different tumors. This study aims to explore the potential functions of miR 20a and its underlying mechanisms in bladder cancer.
Methods: Ninety-six patients diagnosed with bladder cancer were recruited into the study. The expression levels of miR-20a in bladder cancer samples and adjacent non-tumor samples were investigated by qRT-PCR. Wound healing, CCK8, and transwell migration assays were carried out for determining the functions of miR20a. Bioinformatics analysis was used for predicting the downstream gene of miR-20a. Western blot, qRT-PCR, and fluorescent reporter assays were used to verify the target gene.
Results: MiR-20a was significantly increased in bladder cancer tissues, and its rising level was closely correlated with histological grade, clinical stage, recurrence and metastasis in bladder cancer. Exogenous upregulation of miR-20a expression obviously enhanced the aggressive biological functions of bladder cancer in vitro. LASS2 was verified to be a target gene of miR-20a. Moreover, miR-20a can negatively regulate LASS2 at protein and mRNA levels.
Conclusions: Increasing miR-20a is closely related to aggressive clinicopathological features. MiR 20a plays an oncogenic role in bladder cancer, which contributes to target LASS2 directly.

DOI: 10.7754/Clin.Lab.2020.201030