Circ_0003789 Facilitates Gastric Cancer Progression by Inducing the Epithelial-Mesenchymal Transition Through the Wnt/β-Catenin Signaling Pathway.

Background: The role of circular RNAs in the pathogenesis of gastric cancer (GC) has been well documented by numerous studies. However, whether circ_0003789 plays a role during GC progression remains to be determined. Thus, this study investigated the biological functions of circ_0003789 during GC progression. Materials and

Methods: Circ_0003789 expression was determined using quantitative real-time polymerase chain reaction in GC and matched para-carcinoma normal tissues. Functional experiments were performed to estimate changes in the proliferation, apoptosis, migration, and invasion of GC cells treated to silence circ_0003789. E-cadherin, vimentin, Wnt3a, and β-catenin expression was determined using immunofluorescence staining and Western blot assays. Xenograft tumor growth and Ki67 expression were also evaluated in vivo.

Results: Circ_0003789 was upregulated in GC tissues and cells, and its upregulation positively correlated with poor tumor differentiation, distal metastasis, and advanced clinical stage. Silencing circ_0003789 inhibited GC cell proliferation, migration, invasion, and the epithelial-mesenchymal transition (EMT), both in vitro and in vivo. Mechanistically, the Wnt/β-catenin signaling pathway was repressed by circ_0003789 silencing.

Conclusions: Circ_0003789 facilitates GC progression by inducing the EMT through the Wnt/β-catenin signaling pathway.