DOI: https://doi.org/10.21203/rs.2.22221/v1
Backgroud: The aim of this study was to investigate the relationship between the expression of tumor suppressor in lung cancer-1 (TSLC1) and miRNA-125b in bladder cancer (BC) pathogenesis. Methods: The expression of miRNA-125b,TSLC1 and p53 in BC cell line was detected by real-time quantitative RT-PCR (RT-qPCR) or western blot. Transwell migration assay was used in the in vitro migration and invison anssay. TSLC1 and p53 expression was evaluated by immunohistochemistric staining in bladder cancer tissues. Results: We showed that the expression of miRNA-125b was significantly decreased in BC cell line(T24) transfection of miR-125b inhibitor.Knockdown of miRNA-125b promoted the growth and metastasis of T24 cells,while overexpression of miRNA-125b had the opposite effects. Furthermore,TSLC1 was significantly positive correlated with miRNA-125b expression and negative correlated with p53 expression in T24 cells.TSLC1 transfection increased the expression of miRNA-125b,and inhibited BC cell migration and invasion in vitro,and promoted apoptosis. The expression of TSLC1 and p53 was opposite in bladder cancer tissues. Conclusions: Our data provided strong evidence that TSLC1 inhibited tumorigenesis and development of BC through up-regulating tumor-suppressive miRNA-125b.
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