@article { author = {Liu, Dongcao and Zhou, Guang and Shi, Hongbo and Chen, Bin and Sun, Xiaosong and Zhang, Xuejun}, title = {Downregulation of TMEM40 by miR-138-5p suppresses cell proliferation and mobility in clear cell renal cell carcinoma}, journal = {Iranian Journal of Biotechnology}, volume = {18}, number = {1}, pages = {51-59}, year = {2020}, publisher = {National Institute of Genetic Engineering and Biotechnology of Iran}, issn = {1728-3043}, eissn = {2322-2921}, doi = {10.30498/ijb.2019.85193}, abstract = {Background: Clear cell renal cell carcinoma (ccRCC) represents approximately 70% of RCC,as the most frequent histological subtype of RCC. MiR-138-5p, a tumor-related microRNA (miRNA), has been reported to be implicated in the diverse types of human malignancies, but its role in ccRCCremains unclear. Objective: The study was designed to investigate the functional behaviors and regulatory mechanisms of miR-138-5p in ccRCC. Materials and Methods: Quantitative real-time PCR and western blotting analyses were performed to determine the expression of miR-138-5p and TMEM40 in ccRCC tissues. Pearson’s correlation coefficient was utilized to evaluate the correlation between miR-138-5p and TMEM40 expression. The function of miR-138-5p and TMEM40 in the cell proliferation, migration and invasion of ccRCC cells (786-O and ACHN) was assessed by CCK-8, colony formation, wound healing and transwell assay, respectively. A luciferase reporter assay was performed to confirm the direct binding of miR-138-5p to the target gene TMEM40. Results: We found the expression of miR-138-5p was significantly down-regulated, while TMEM40 was remarkably up-regulated in ccRCC tissues. TMEM40 expression was discovered to be inversely correlated with miR-138-5p expression in ccRCC tissues. Functional studies demonstrated that miR-138-5p overexpression or TMEM40 knockdown significantly suppressed ccRCC cell proliferation, migration and invasion in vitro. Notably, we experimentally confirmed that miR-138-5p directly recognizes the 3’-UTR of the TMEM40 transcript and down-regulated its expression in ccRCC cells. Conclusions: Taken together, our findings provide the first clues regarding the role of miR-138-5p as a tumor suppressor in ccRCC by directly targeting  of TMEM40.}, keywords = {Clear cell renal cell carcinoma,miR-138-5p,TMEM40,tumor suppressor}, url = {https://www.ijbiotech.com/article_85193.html}, eprint = {https://www.ijbiotech.com/article_85193_9409e6461af0b31d37898a83e9bb5036.pdf} }