Circ_0001247 functions as a miR-1270 sponge to accelerate cervical cancer progression by up-regulating ZEB2 expression level.

Abstract

There is increasing evidence that circular RNA (circRNA) disorders have an impact on the progression of various malignancies. The expression characteristics, function and underlying mechanism of circ_0001247 in cervical cancer (CC) have not been confirmed. GSE147483 datasets of circRNAs expression in CC cell line and normal cervical cell line were retrieved from GEO database, and the circRNA with significant difference was selected; circ_0001247, miR-1270, and Zinc finger E-box binding homeobox 2 (ZEB2) expressions in CC tissues and cell lines were analyzed by quantitative real-time polymerase chain reaction (qRT-PCR) assay; cell counting kit-8 (CCK-8) assay and BrdU assay were applied to monitor the proliferative ability of CC cells; Transwell assay was conducted to examine the migration and invasion of CC cells, and flow cytometry was used to evaluate the apoptosis; Western blot assay was adopted to detect ZEB2 protein expressions; dual-luciferase report gene assay was used to verify the targeting relationship between circ_0001247 and miR-1270, and miR-1270 and the 3'UTR of ZEB2. Analysis of GSE147483 suggested that circ_0001247 could probably be an oncogenic circRNA in CC. Compared with that in adjacent tissues and normal cervical epithelial cells, circ_0001247 expression in CC tissues and cell lines was significantly increased; knocking down circ_0001247 expression could inhibit the proliferation and metastasis of CC cells, and promote apoptosis, while circ_0001247 overexpression worked oppositely; circ_0001247 sponged miR-1270 in CC cells; miR-1270 diminished the promoting effect of circ_0001247 by inactivating the ZEB2. Circ_0001247 promotes progression of CC by sponging miR-1270 to upregulate ZEB2 expression level.