Open Access

miR‑592 acts as an oncogene and promotes medullary thyroid cancer tumorigenesis by targeting cyclin‑dependent kinase 8

  • Authors:
    • Ting Liu
    • Jingjing Meng
    • Yu Zhang
  • View Affiliations

  • Published online on: July 30, 2020     https://doi.org/10.3892/mmr.2020.11392
  • Pages: 3316-3326
  • Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Medullary thyroid carcinoma (MTC) is a relatively rare subtype of thyroid cancer, accounting for 5‑10% of all cases of thyroid cancer worldwide. Due to the current lack of knowledge regarding the tumorigenesis of MTC, the clinical treatment of MTC remains a challenge. It has been reported that microRNAs (miRNAs) regulate the progression of MTC; however, the regulatory network of miRNAs and the exact underlying mechanisms are not completely understood. In the present study, an miRNA expression profile (GSE40807), consisting of 80 samples, was downloaded and analyzed using Gene Expression Omnibus‑2R to identify differentially expressed miRNAs between MTC and normal samples. miR‑592 expression levels were significantly increased in MTC tissues and cell lines compared with normal tissues and cell lines. Patients with high miR‑592 expression levels exhibited a less favorable prognosis compared with patients with low miR‑592 expression. The results suggested that miR‑592 overexpression promoted TT and MZ‑CRC‑1 cell proliferation in vitro. In addition, miR‑592 negatively regulated cyclin‑dependent kinase 8 (CDK8) via targeted binding in MTC cells. Moreover, co‑transfection of CDK8 overexpression plasmid and miR‑592 mimic reversed miR‑592‑mediated MTC cell proliferation. In conclusion, miR‑592 may serve as an oncogene in MTC by decreasing the expression of CDK8, indicating that the miR‑592/CDK8 axis might serve as a promising therapeutic target for MTC.
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October-2020
Volume 22 Issue 4

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Liu T, Meng J and Zhang Y: miR‑592 acts as an oncogene and promotes medullary thyroid cancer tumorigenesis by targeting cyclin‑dependent kinase 8 . Mol Med Rep 22: 3316-3326, 2020
APA
Liu, T., Meng, J., & Zhang, Y. (2020). miR‑592 acts as an oncogene and promotes medullary thyroid cancer tumorigenesis by targeting cyclin‑dependent kinase 8 . Molecular Medicine Reports, 22, 3316-3326. https://doi.org/10.3892/mmr.2020.11392
MLA
Liu, T., Meng, J., Zhang, Y."miR‑592 acts as an oncogene and promotes medullary thyroid cancer tumorigenesis by targeting cyclin‑dependent kinase 8 ". Molecular Medicine Reports 22.4 (2020): 3316-3326.
Chicago
Liu, T., Meng, J., Zhang, Y."miR‑592 acts as an oncogene and promotes medullary thyroid cancer tumorigenesis by targeting cyclin‑dependent kinase 8 ". Molecular Medicine Reports 22, no. 4 (2020): 3316-3326. https://doi.org/10.3892/mmr.2020.11392