Have tumor suppressor PDCD4 and its counteragent oncogenic miR-21 gone rogue?

Mol Interv. 2010 Apr;10(2):76-9. doi: 10.1124/mi.10.2.5.

Abstract

A recent article suggests that the well known tumor suppressor PDCD4 also functions as a pro-inflammatory agent. The PDCD4 counteragent miR-21, a pro-oncogenic micro-RNA, is described as an anti-inflammatory agent. The authors of this research article provide evidence that mice lacking PDCD4 are protected from the lethal effects of lipopolysaccharide (LPS). This report also confirms miR-21 as a negative regulator of PDCD4 expression after LPS stimulation. Downstream mediators of the pro-inflammatory activity of PDCD4 include IL-10, an anti-inflammatory cytokine that is negatively regulated by PDCD4, and IL-6, a pro-inflammatory cytokine that appears to be upregulated in a PDCD4 dependent manner, possibly through an increase in NF-κB activity. Is it possible that a tumor-suppressor protein and an oncogenic micro-RNA can be oppositely targeted to control inflammatory disease?

Publication types

  • Review

MeSH terms

  • Apoptosis Regulatory Proteins / biosynthesis*
  • Apoptosis Regulatory Proteins / immunology*
  • Gene Expression Regulation*
  • Humans
  • MicroRNAs / biosynthesis*
  • MicroRNAs / immunology*
  • Models, Biological
  • Neoplasms / immunology*
  • RNA-Binding Proteins / biosynthesis*
  • RNA-Binding Proteins / immunology*

Substances

  • Apoptosis Regulatory Proteins
  • MIRN21 microRNA, human
  • MicroRNAs
  • PDCD4 protein, human
  • RNA-Binding Proteins