Overexpression of miR-1283 Inhibits Cell Proliferation and Invasion of Glioma Cells by Targeting ATF4

Oncol Res. 2019 Feb 21;27(3):325-334. doi: 10.3727/096504018X15251282086836. Epub 2018 May 1.

Abstract

It is well known that activating transcription factor 4 (ATF4) expression is closely associated with progression of many cancers. We found that miR-1283 could directly target ATF4. However, the precise mechanisms of miR-1283 in glioma have not been well clarified. Our study aimed to explore the interaction between ATF4 and miR-1283 in glioma. In this study, we found that the level of miR-1283 was dramatically decreased in glioma tissues and cell lines, the expression of ATF4 was significantly increased, and the low level of miR-1283 was closely associated with high expression of ATF4 in glioma tissues. Moreover, introduction of miR-1283 significantly inhibited proliferation and invasion of glioma cells. However, knockdown of miR-1283 promoted the proliferation and invasion in glioma cells. Bioinformatics analysis predicted that the ATF4 was a potential target gene of miR-1283. Luciferase reporter assay demonstrated that miR-1283 could directly target ATF4. In addition, knockdown of ATF4 had similar effects with miR-1283 overexpression on glioma cells. Upregulation of ATF4 in glioma cells partially reversed the inhibitory effects of miR-1283 mimic. Overexpression of miR-1283 inhibited cell proliferation and invasion of glioma cells by directly downregulating ATF4 expression.

MeSH terms

  • Activating Transcription Factor 4 / genetics*
  • Brain Neoplasms / genetics
  • Brain Neoplasms / pathology
  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Proliferation / genetics*
  • Down-Regulation / genetics
  • Epithelial-Mesenchymal Transition / genetics
  • Gene Expression Regulation, Neoplastic / genetics
  • Glioma / genetics*
  • Glioma / pathology
  • Humans
  • MicroRNAs / genetics*
  • Neoplasm Invasiveness / genetics*
  • Neoplasm Invasiveness / pathology
  • Up-Regulation / genetics

Substances

  • ATF4 protein, human
  • MIRN1283 microRNA, human
  • MicroRNAs
  • Activating Transcription Factor 4