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Article Open Access

Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge

  • Authors:
    • Tianpeng He
    • Xin Li
    • Dongmei Xie
    • Lili Tian
  • View Affiliations / Copyright

    Affiliations: Department of Stomatology, China‑Japan Friendship Hospital, Beijing 100029, P.R. China
    Copyright: © He et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3509-3518
    |
    Published online on: August 26, 2019
       https://doi.org/10.3892/mmr.2019.10615
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Abstract

Circular RNAs (circRNAs) comprise a novel class of widespread non‑coding RNAs that may regulate gene expression in eukaryotes. However, the characterization and function of circRNAs remain elusive in human cancer, including oral squamous cell carcinoma (OSCC). In this study, the expression level of circPVT1 in OSCC was detected and define its functional role in initiation and progression of OSCC. It was identified that circPVT1 was upregulated in OSCC cells and specimens. Knockdown of circPVT1 suppressed cell proliferation as evidenced by Cell Counting kit‑8 assay and elevated Ki‑67 expression. Mechanistically, it was demonstrated that circPVT1 possessed two targeting sites of microRNA (miRNA/miR)‑125b and could effectively sponge miR‑125b to release its downstream mRNA targets. Subsequently, the downstream target signal transducer and activator of transcription 3 (STAT3) was verified as a direct target of miR‑125b and STAT3 expression was regulated by the circPVT1/miR‑125b axis. CircPVT1 functioned as competing endogenous RNA (ceRNA) to increase the STAT3 level and cell proliferation through sponging miR‑125b. In conclusion, circPVT1 regulates cell proliferation and may serve as a promising therapeutic target for OSCC patients. Therefore, silencing of circPVT1 could be a future direction to develop a novel treatment strategy.
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Copy and paste a formatted citation
Spandidos Publications style
He T, Li X, Xie D and Tian L: Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge. Mol Med Rep 20: 3509-3518, 2019.
APA
He, T., Li, X., Xie, D., & Tian, L. (2019). Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge. Molecular Medicine Reports, 20, 3509-3518. https://doi.org/10.3892/mmr.2019.10615
MLA
He, T., Li, X., Xie, D., Tian, L."Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge". Molecular Medicine Reports 20.4 (2019): 3509-3518.
Chicago
He, T., Li, X., Xie, D., Tian, L."Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge". Molecular Medicine Reports 20, no. 4 (2019): 3509-3518. https://doi.org/10.3892/mmr.2019.10615
Copy and paste a formatted citation
x
Spandidos Publications style
He T, Li X, Xie D and Tian L: Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge. Mol Med Rep 20: 3509-3518, 2019.
APA
He, T., Li, X., Xie, D., & Tian, L. (2019). Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge. Molecular Medicine Reports, 20, 3509-3518. https://doi.org/10.3892/mmr.2019.10615
MLA
He, T., Li, X., Xie, D., Tian, L."Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge". Molecular Medicine Reports 20.4 (2019): 3509-3518.
Chicago
He, T., Li, X., Xie, D., Tian, L."Overexpressed circPVT1 in oral squamous cell carcinoma promotes proliferation by serving as a miRNA sponge". Molecular Medicine Reports 20, no. 4 (2019): 3509-3518. https://doi.org/10.3892/mmr.2019.10615
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