Abstract
Increasing evidence reveal the important role of long non-coding RNAs (lncRNAs) in the initiation and progression of glioma. However, the role of lncRNA cancer susceptibility candidate 7 (CASC7) in glioma is largely unknown. At first, the expression level of CASC7 was tested in glioma tissues and cell lines by using qRT-PCR. We applied Kaplan-Meier method to analyze the correlation between the expression level between CASC7 expression and the overall survival rate of glioma patients. We found that CASC7 was downregulated in glioma tissues and cell liens and predicted poor prognosis for patients with glioma. To determine the involvement of CASC7 in the biological processes of glioma, we conducted gain or loss-of function assays in two glioma patients. We found that CASC7 suppressed glioma cell proliferation and induced glioma cell apoptosis. Mechanistically, the expression level of CASC7 was negatively correlated with the expression levels of core factors of Wnt/β-catenin signaling pathway in glioma cells. Moreover, TOP flash luciferase activity further revealed the negative effect of CASC7 on the activity of Wnt/β-catenin signaling pathway. Finally, rescue assays were carried out to determine that Wnt/β-catenin signaling pathway involved in CASC7-mediated glioma progression. Taken together, all research findings suggested that CASC7 inhibited the progression of glioma via regulating Wnt/β-catenin signaling pathway.
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