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Stat3 inhibits WTX expression through up-regulation of microRNA-370 in Wilms tumor

Xu Cao1, Dehong Liu, Xiangming Yan

  • 1Department of Surgery, Childrens' Hospital Affiliated to Soochow University, Soochow University, Suzhou 215003, PR China.

FEBS Letters
|January 22, 2013
PubMed

Insights

Signal transducer and activator of transcription 3 (Stat3) is highly activated in Wilms tumor. Stat3 promotes Wilms tumor cell proliferation by up-regulating microRNA-370, which inhibits WTX expression.

Area of Science:

  • Pediatric oncology
  • Molecular biology
  • Cancer genetics

Background:

  • Wilms tumor (WT) is a heterogeneous childhood kidney cancer with identified genetic mutations.
  • The molecular mechanisms driving WT tumorigenesis are not fully understood.
  • Signal transducer and activator of transcription 3 (Stat3) is a key transcription factor implicated in oncogenesis.

Purpose of the Study:

  • To investigate the role of Stat3 activation in Wilms tumor development.
  • To elucidate the molecular mechanisms by which Stat3 influences Wilms tumor progression.
  • To identify potential therapeutic targets within the Stat3 signaling pathway.

Main Methods:

  • Comparative analysis of Stat3 activation in Wilms tumor tissues versus adjacent tissues.
  • In vitro studies using G401 cells treated with IL-6 or transfected with activated Stat3.
  • Molecular analysis to determine the effect of Stat3 on WTX expression and microRNA-370 levels.

Main Results:

  • Stat3 was found to be highly activated in Wilms tumor tissues.
  • IL-6 treatment and activated Stat3 transfection promoted proliferation in G401 cells.
  • Stat3 was shown to inhibit WTX expression via up-regulation of microRNA-370.

Conclusions:

  • The Stat3/microRNA-370/WTX regulatory axis is a critical mechanism in Wilms tumor pathogenesis.
  • Targeting Stat3 activation may offer a therapeutic strategy for Wilms tumor.
  • Further research into this pathway could reveal novel insights into childhood kidney cancer.

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