MicroRNA‑92a‑3p inhibits the cell proliferation, migration and invasion of Wilms tumor by targeting NOTCH1.

Dysregulation of miR-92a-3p has been shown to contribute to many tumorigenic processes, and is correlated with tumor progression and prognosis. However, the association between miR-92a-3p and the clinicopathological features of Wilms tumorand its regulatory mechanism remain unknown. In the present study, we demonstrated that miR-92a-3p was downregulated in Wilms tumor tissues and was significantly correlated with the lung metastasis of patients with Wilms tumor. Furthermore, miR-92a-3p mimics suppressed Wilms tumor cell proliferation, migration and invasion by in vitro assays. In addition, miR-92a-3p knockdown promoted tumor progression. Moreover, miR-92a-3p was shown to target directly the 3-UTR of NOTCH1 mRNA by Dual-Luciferase reporter assays in Wilm's tumor cells. miR-92a-3p mimics decreased the expression of mRNA and protein of NOTCH1. miR-92a-3p inhibitor enhanced NOTCH1 expression by using western blotting and qPCR. In Wilms tumor tissues, NOTCH1 was highly expressed when compared with that in adjacent non-tumor tissues. NOTCH1 expression was found to be negatively correlated with miR-92a-3p in tumor tissues. Knockdown of NOTCH1 expression reversed the promotive effect of miR-92a-3p inhibitor on the cell proliferation, migration and invasion in Wilms tumor. In conclusion, miR-92a-3p blocks the progression of Wilms tumor by targeting NOTCH1.