KCNQ1OT1 accelerates gastric cancer progression via miR-4319/DRAM2 axis

Int J Immunopathol Pharmacol. 2020 Jan-Dec:34:2058738420954598. doi: 10.1177/2058738420954598.

Abstract

Introduction: This work was to explore the connection of KCNQ1 opposite strand/antisense transcript 1 (KCNQ1OT1) and microRNA-4319 (miR-4319), and to investigate the associated underlying mechanisms in gastric cancer (GC) progression.

Methods: Quantitative real-time PCR was performed to measure KCNQ1OT1, miR-4319 and DNA-damage regulated autophagy modulator 2 (DRAM2) expression levels in GC cells. Moreover, expression level of KCNQ1OT1 and DRAM2 in GC tissues was analyzed at ENCORI website (http://starbase.sysu.edu.cn/index.php). Cell proliferation, colony formation assay and flow cytometry assays were performed to analyze effects of KCNQ1OT1, miR-4319 and DRAM2 on cell growth and death. Dual-luciferase activity reporter assay and RNA immunoprecipitation assay was conducted to verify the interactions of KCNQ1OT1 or DRAM2 and miR-4319.

Results and conclusion: We found KCNQ1OT1 level was increased in tumor tissues and cells. Force the expression of KCNQ1OT1 promotes, while knockdown KCNQ1OT1 inhibits GC cell growth. Further studies indicated miR-4319 functioned as a bridge between KCNQ1OT1 and DRAM2. Finally, we showed KCNQ1OT1/miR-4319/DRAM2 axis regulates GC cell growth in vitro and in vivo. lncRNA KCNQ1OT1 promotes GC progression by sponging miR-4319 to upregulate DRAM2, indicating KCNQ1OT1 might be a promising target for GC treatment.

Keywords: LncRNA KCNQ1OT1; apoptosis; gastric cancer; miR-4319/DRAM2 axis; proliferation.

Publication types

  • Retracted Publication

MeSH terms

  • Apoptosis
  • Cell Line, Tumor
  • Cell Proliferation
  • Disease Progression
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Membrane Proteins / genetics
  • Membrane Proteins / metabolism*
  • MicroRNAs / genetics
  • MicroRNAs / metabolism*
  • Potassium Channels, Voltage-Gated / genetics
  • Potassium Channels, Voltage-Gated / metabolism
  • Signal Transduction
  • Stomach Neoplasms / genetics
  • Stomach Neoplasms / metabolism*
  • Stomach Neoplasms / pathology

Substances

  • DRAM2 protein, human
  • KCNQ1OT1 long non-coding RNA, human
  • MIRN4319 microRNA, human
  • Membrane Proteins
  • MicroRNAs
  • Potassium Channels, Voltage-Gated