EGF-mediated reduced miR-92a-1-5p controls HTR-8/SVneo cell invasion through activation of MAPK8 and FAS which in turn increase MMP-2/-9 expression

Sci Rep. 2020 Jul 23;10(1):12274. doi: 10.1038/s41598-020-68966-4.

Abstract

The members of human miR-17-92 cluster are implicated in several cancers and are known to increase cancer cells invasiveness. The present study reports reduced expression of miR-92a-1-5p in EGF treated HTR-8/SVneo trophoblastic cells by NGS and qRT-PCR. Overexpression of miR-92a-1-5p led to significantly reduced EGF-mediated HTR-8/SVneo cells invasion. MAPK8 and FAS were predicted to be miR-92a-1-5p targets, and confirmed to be reduced by qRT-PCR and Western blotting in trophoblast cells overexpressing miR-92a-1-5p. The binding of miR-92a-1-5p to MAPK8 and FAS 3'-UTR was confirmed by Luciferase reporter assay and Rescue assay. EGF increases MMP-2 & MMP-9 expression and reduces TIMP1 expression in HTR-8/SVneo cells. Inhibition of MAPK8 (by SP600125) reduced EGF-mediated MMP-9/TIMP1 ratio and invasion. Similarly, silencing of FAS by siRNA reduced EGF-mediated MMP-2/TIMP1 ratio and invasion. Treatment of HTR-8/SVneo cells with STAT1/3 inhibitors or siRNAs led to loss of EGF-mediated reduction in miR-92a-1-5p levels. Inserting the predicted binding sites of STAT3 present in promoter region of miR-92a-1-5p upstream of Luciferase promoter reduced its expression in presence of STAT3 expression vector. Thus, EGF leads to reduced miR-92a-1-5p expression which may be regulated by STAT1/STAT3 and controls HTR-8/SVneo cells invasion by targeting MAPK8 and FAS, which in turn increases MMP-2/MMP-9 expression.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line
  • Cell Movement / drug effects
  • Epidermal Growth Factor / metabolism*
  • Gene Expression Profiling
  • Gene Expression Regulation* / drug effects
  • Gene Silencing
  • Humans
  • Matrix Metalloproteinase 2 / genetics*
  • Matrix Metalloproteinase 2 / metabolism
  • Matrix Metalloproteinase 9 / genetics*
  • Matrix Metalloproteinase 9 / metabolism
  • MicroRNAs / genetics*
  • Mitogen-Activated Protein Kinase 8 / antagonists & inhibitors
  • Mitogen-Activated Protein Kinase 8 / metabolism*
  • Protein Kinase Inhibitors / pharmacology
  • STAT1 Transcription Factor / metabolism
  • STAT3 Transcription Factor / metabolism
  • Transcriptome
  • fas Receptor / genetics
  • fas Receptor / metabolism*

Substances

  • MIRN92 microRNA, human
  • MicroRNAs
  • Protein Kinase Inhibitors
  • STAT1 Transcription Factor
  • STAT1 protein, human
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • fas Receptor
  • Epidermal Growth Factor
  • Mitogen-Activated Protein Kinase 8
  • Matrix Metalloproteinase 2
  • Matrix Metalloproteinase 9