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Targeting TGF-β1 inhibits invasion of anaplastic thyroid carcinoma cell through SMAD2-dependent S100A4-MMP-2/9

Kejun Zhang1, Xiaoli Liu2, Fengyun Hao3

  • 1Department of Thyroid Surgery, The Affiliated Hospital of Qingdao University Qingdao 266003, China.

American Journal of Translational Research
|June 28, 2016
PubMed
Abstract

Insights

Targeting transforming growth factor-beta 1 (TGF-β1) inhibits anaplastic thyroid cancer (ATC) cell invasion. Down-regulating TGF-β1 impedes SMAD2-dependent S100A4 and MMP-2/9 signaling, offering a potential therapeutic strategy for this lethal malignancy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Anaplastic thyroid cancer (ATC) is a highly lethal malignancy with poorly understood invasion mechanisms.
  • The transforming growth factor-beta (TGF-β) signaling pathway is implicated in tumor metastasis.
  • Overexpression of TGF-β1 has been observed in ATC, suggesting its potential role in disease progression.

Purpose of the Study:

  • To investigate the role of TGF-β1 in ATC cell invasion.
  • To test the hypothesis that targeted down-regulation of TGF-β1 inhibits ATC cell invasion.

Main Methods:

  • Investigated the effects of TGF-β1 stimulation and TGF-β1 silencing using small interfering RNA (siRNA) on 8505C and SW1736 ATC cell lines in vitro.
  • Utilized siRNAs and inhibitors to examine the TGF-β1 signaling pathway, including pSMAD2, S100A4, and MMP-2/9 expression.

Main Results:

  • TGF-β1 siRNA significantly inhibited ATC cell migration and invasion in vitro.
  • TGF-β1 stimulation activated pSMAD2-dependent S100A4 and MMP-2/9 expression, increasing cell migration and invasion.
  • Depletion of pSMAD2, S100A4, or MMP-2/9 expression inhibited the TGF-β1 signaling pathway and weakened its proinvasive effects.

Conclusions:

  • Targeting TGF-β1 inhibits ATC cell invasion by impeding the SMAD2-dependent S100A4-MMP-2/9 signaling pathway in vitro.
  • These findings suggest that therapies targeting TGF-β1 could be a viable strategy for treating anaplastic thyroid cancer.
Keywords:
Anaplastic thyroid cancerTGF-β1metastasis

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