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Neoplasma Vol.67, No.5, p.1032–1041, 2020 |
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Title: Circular RNA circ_0000615 knockdown suppresses the development of nasopharyngeal cancer through regulating the miR-338-3p/FGF2 axis | ||
Author: H. S. Liu, R. N. Zheng, L. B. Guo, X. J. Fu | ||
Abstract: Nasopharyngeal cancer (NPC) is a type of head and neck cancer with a high rate of metastasis. Circular RNAs (circRNAs) were reported to be related to the development of human cancers. This research aimed to investigate the functional mechanism of circRNA circ_0000615 in NPC. The gene expression was examined by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was employed to assess cell proliferation ability. Transwell assay was used to measure cell migratory and invasive abilities. Furthermore, the interaction between miR-338-3p and circ_0000615 or fibroblast growth factor 2 (FGF2) was predicted by starBase v.2.0 and then confirmed by the dual-luciferase reporter assay. Besides, the mouse xenograft experiment was carried out to explore the effect of circ_0000615 on tumor growth in vivo. We detected increased levels of circ_0000615 and FGF2, along with a decreased level of miR-338-3p in NPC tissues and cells. Circ_0000615 knockdown suppressed the proliferation, migration, invasion, and EMT of NPC cells. Interestingly, circ_0000615 interacted with miR-338-3p, and miR-338-3p targeted FGF2. Circ_0000615 inhibited miR-338-3p expression to upregulate the FGF2 level. Furthermore, both miR-338-3p depletion and FGF2 overexpression weakened the effect of circ_0000615 knockdown on NPC cell progression. Besides, circ_0000615 knockdown repressed tumor growth in vivo. In conclusion, our findings demonstrated that circ_0000615 knockdown suppressed the growth of NPC cells via modulating miR-338-3p/FGF2 axis, providing a theoretical basis for the treatment of NPC. |
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Keywords: circ_0000615, miR-338-3p, FGF2, cell growth, nasopharyngeal cancer | ||
Published online: 25-May-2020 | ||
Year: 2020, Volume: 67, Issue: 5 | Page From: 1032, Page To: 1041 | |
doi:10.4149/neo_2020_191019N1061 |
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