MicroRNA-106a promotes cell migration and invasion by targeting tissue inhibitor of matrix metalloproteinase 2 in cervical cancer

Oncol Rep. 2017 Sep;38(3):1774-1782. doi: 10.3892/or.2017.5832. Epub 2017 Jul 18.

Abstract

Increasing evidence has demonstrated that miRNAs play a critical role in tumor development and progression. Previous studies have revealed that miR-106a is abnormally expressed in various cancers. However, its function and underlying mechanism in cervical cancer (CC) remains unknown. In this study, we confirmed that the expression of miR-106a was significantly upregulated in both CC cell lines and tissues by qRT-PCR. The increased expression of miR-106a was obviously associated with adverse prognostic features. Moreover, we demonstrated that miR-106a was a novel independent prognostic marker for predicting the 5-year survival of CC patients. The ectopic overexpression of miR‑106a promoted cell migration, invasion and invasion-related gene expression, while downregulated miR-106a reversed the effect. In addition, miR-106a regulated tissue inhibitor of metalloproteinase (TIMP)2 by directly binding to its 3'-UTR, leading to the indution of the expression of matrix metalloproteinases (MMPs). In clinical samples of CC, miR-106a was inversely correlated with TIMP2, which was downregulated in CC. Alteration of TIMP2 expression at least partially abolished the migration, invasion and MMP expression of miR-106a in CC cells. In conclusion, our data indicated that miR-106a promoted the migration, invasion and MMP expression of CC by targeting TIMP2, and may represent a novel potential therapeutic target and prognostic marker for CC.

MeSH terms

  • 3' Untranslated Regions / genetics
  • Cell Line, Tumor
  • Cell Movement / genetics*
  • Cell Proliferation / genetics
  • Down-Regulation / genetics
  • Female
  • Gene Expression Regulation, Neoplastic / genetics
  • Humans
  • Matrix Metalloproteinase 2 / genetics
  • MicroRNAs / genetics*
  • Middle Aged
  • Neoplasm Invasiveness / genetics*
  • Neoplasm Invasiveness / pathology
  • RNA Interference / physiology
  • Tissue Inhibitor of Metalloproteinase-2 / genetics*
  • Up-Regulation / genetics
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / pathology

Substances

  • 3' Untranslated Regions
  • MIRN106 microRNA, human
  • MicroRNAs
  • TIMP2 protein, human
  • Tissue Inhibitor of Metalloproteinase-2
  • Matrix Metalloproteinase 2