[HTML][HTML] miR-140-5p could suppress tumor proliferation and progression by targeting TGFBRI/SMAD2/3 and IGF-1R/AKT signaling pathways in Wilms' tumor

Z Liu, F He, S OuYang, Y Li, F Ma, H Chang, D Cao… - BMC cancer, 2019 - Springer
Z Liu, F He, S OuYang, Y Li, F Ma, H Chang, D Cao, J Wu
BMC cancer, 2019Springer
Background Wilms' tumor is also called nephroblastoma and is the most common pediatric
renal cancer. Several genetic and epigenetic factors have been found to account for the
development of Wilms' tumor. MiRNAs play important roles in this tumorigenic process. In
the present study, we aimed to investigate the role of miR-140-5p in nephroblastoma by
identifying its targets, as well as its underlying molecular mechanism of action. Methods The
miRNA expression profile of nephroblastoma samples was investigated and the targets of …
Background
Wilms’ tumor is also called nephroblastoma and is the most common pediatric renal cancer. Several genetic and epigenetic factors have been found to account for the development of Wilms’ tumor. MiRNAs play important roles in this tumorigenic process. In the present study, we aimed to investigate the role of miR-140-5p in nephroblastoma by identifying its targets, as well as its underlying molecular mechanism of action.
Methods
The miRNA expression profile of nephroblastoma samples was investigated and the targets of miR-140-5p were predicted and validated using the miRNA luciferase reporter method. Moreover, the roles of miR-140-5p in regulating nephroblastoma cell proliferation, migration and cell cycle were analyzed by the CCK8, migration and flow cytometry assays, respectively. The downstream protein of the direct target of miR-140-5p was also identified.
Results
miR-140-5p was downregulated in Wilms’ tumor tissues, whereas in the nephroblastoma cell lines G401 and WT-CLS1 that exhibited high levels of miRNA-140-5p, inhibition of cellular proliferation and metastasis were noted as well as cell cycle arrest at the G1/S phase. TGFBRI and IGF1R were identified as direct target genes for miRNA-140-5p. In addition, SMAD2/3 and p-AKT were regulated by TGFBRI and IGF1R separately and participated in the miRNA-140-5p regulatory network. Ectopic expression of TGFBR1 and IGF-1R could abrogate the inhibitory effect of miR-140-5p.
Conclusion
We demonstrated that miRNA-140-5p participates in the progression of Wilms’ tumor by targeting the TGFBRI/SMAD2/3 and the IGF-1R/AKT signaling pathways.
Springer