MiR-200c inhibits metastasis of breast tumor via the downregulation of Foxf2

Genet Mol Res. 2017 Aug 17;16(3). doi: 10.4238/gmr16038971.

Abstract

The forkhead box F2 (Foxf2) gene suppresses epithelial-mesenchymal transition via the modulation of transcription of zinc finger E-box-binding homeobox 1 (Zeb1) and epithelial (E)-cadherin, thereby inhibiting tumor metastasis. Additionally, the specific binding of microRNA (miR)-200c to Foxf2 mRNA impedes metastatic pulmonary cancer. However, the role of miR-200c in breast cancer is still unknown. Therefore, in this study, miR-200c mimics were transfected into the highly metastatic breast cancer cell line MDA-MB-231. Their invasion and migration abilities were observed by scratch and transwell migration assays. Real-time PCR was used to detect mRNA levels of Foxf2, Zeb1, and E-cadherin, whereas Foxf2 protein level was determined by western blot analysis. Our results showed that, compared to the control group, miR-200c inhibited the migration or invasion of MDA-MB-231 cells. Real-time PCR and western blot analysis exhibited significant decreases in Foxf2 expression in the presence of miR-200c, along with a decrease in Zeb1 and increase in E-cadherin mRNA expressions. Thus, our preliminary data demonstrated that miR-200c could inhibit the metastasis of breast cancer cells by downregulating Foxf2 expression, providing leads for the discovery of a novel breast cancer treatment.

MeSH terms

  • Breast Neoplasms / genetics
  • Breast Neoplasms / metabolism*
  • Cadherins / genetics
  • Cadherins / metabolism
  • Cell Line, Tumor
  • Cell Movement*
  • Down-Regulation
  • Female
  • Forkhead Transcription Factors / genetics*
  • Forkhead Transcription Factors / metabolism
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • MicroRNAs / genetics*
  • MicroRNAs / metabolism
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Zinc Finger E-box-Binding Homeobox 1 / genetics
  • Zinc Finger E-box-Binding Homeobox 1 / metabolism

Substances

  • Cadherins
  • FOXF2 protein, human
  • Forkhead Transcription Factors
  • MIRN200 microRNA, human
  • MicroRNAs
  • RNA, Messenger
  • ZEB1 protein, human
  • Zinc Finger E-box-Binding Homeobox 1