Transforming growth factor-β1 induces invasion ability of HSC-4 human oral squamous cell carcinoma cells through the Slug/Wnt-5b/MMP-10 signalling axis

J Biochem. 2016 Jun;159(6):631-40. doi: 10.1093/jb/mvw007. Epub 2016 Feb 8.

Abstract

Molecular mechanism underlying the invasion of oral cancer cells remains to be clarified. We previously demonstrated that transforming growth factor-β1 (TGF-β1) induces the expression of mesenchymal markers in human oral squamous cell carcinoma HSC-4 cells. Intriguingly, the expression of the epithelial-mesenchymal transition-related transcription factor Slug was also significantly upregulated upon TGF-β1 stimulation. However, the mechanism by which Slug transduces the TGF-β1-induced signal to enhance the invasiveness of HSC-4 cells is poorly understood. Proteomic analysis revealed that the expression of matrix metalloproteinase (MMP)-10 was upregulated in TGF-β1-stimulated cells. Additionally, a Boyden chamber assay revealed that the TGF-β1-induced increase in invasiveness of HSC-4 cells was significantly inhibited by MMP-10 small interfering RNA (siRNA). Intriguingly, Slug siRNA suppressed TGF-β1-induced expression of MMP-10. These results suggest that TGF-β1 induces invasion in HSC-4 cells through the upregulation of MMP-10 expression in a Slug-dependent manner. On the other hand, Slug siRNA suppressed TGF-β1-induced Wnt-5b expression. Wnt-5b significantly induced MMP-10 expression, whereas Wnt-5b siRNA suppressed the TGF-β1-induced increase in invasiveness, suggesting that TGF-β1-induced expression of MMP-10 and the resulting upregulation of invasiveness are mediated by Wnt-5b. Overall, these results suggest that TGF-β1 stimulates HSC-4 cell invasion through the Slug/Wnt-5b/MMP-10 signalling axis.

Keywords: MMP-10; Slug; TGF-β; Wnt-5b; invasion.

MeSH terms

  • Carcinoma, Squamous Cell / metabolism*
  • Carcinoma, Squamous Cell / pathology
  • Cell Line, Tumor
  • Humans
  • Matrix Metalloproteinase 10 / metabolism*
  • Mouth Neoplasms / metabolism*
  • Mouth Neoplasms / pathology
  • Neoplasm Invasiveness
  • Neoplasm Proteins / metabolism*
  • Signal Transduction*
  • Snail Family Transcription Factors / metabolism*
  • Transforming Growth Factor beta1 / metabolism*
  • Wnt Proteins / metabolism*

Substances

  • Neoplasm Proteins
  • SNAI1 protein, human
  • Snail Family Transcription Factors
  • TGFB1 protein, human
  • Transforming Growth Factor beta1
  • WNT5B protein, human
  • Wnt Proteins
  • MMP10 protein, human
  • Matrix Metalloproteinase 10