International Journal of Oral Biology

  • 제43권3호
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  • Pages.161-169
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  • 2018
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  • 1226-7155(pISSN)
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  • 2287-6618(eISSN)
대한구강생물학회 (The Korean Academy of Oral Biology)
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Beta-Catenin Downregulation Contributes to Epidermal Growth Factor-induced Migration and Invasion of MDAMB231 Cells

  • Kwon, Arang (Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Park, Hyun-Jung (Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University) ;
  • Baek, Jeong-Hwa (Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University)
  • 투고 : 2018.09.05
  • 심사 : 2018.08.23
  • 발행 : 2018.09.30
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초록

We previously demonstrated that epidermal growth factor (EGF) enhances cell migration and invasion of breast cancer cells in a SMAD ubiquitination regulatory factor 1 (SMURF1)-dependent manner and that SMURF1 induces degradation of ${\beta}-catenin$ in C2C12 cells. However, the relationship between EGF-induced SMURF1 and ${\beta}-catenin$ expression in breast cancer cells remains unclear. So, we investigated if EGF and SMURF1 regulate ${\beta}-catenin$ expression in MDAMB231 human breast cancer cells. When MDAMB231 cells were incubated with EGF for 24, 48, and 72 hours, EGF significantly increased expression levels of SMURF1 mRNA and protein while suppressing expression levels of ${\beta}-catenin$ mRNA and protein. Overexpression of SMURF1 downregulated ${\beta}-catenin$ mRNA and protein, whereas knockdown of SMURF1 increased ${\beta}-catenin$ expression and blocked EGF-induced ${\beta}-catenin$ downregulation. Knockdown of ${\beta}-catenin$ enhanced cell migration and invasion of MDAMB231 cells, while ${\beta}-catenin$ overexpression suppressed EGF-induced cell migration and invasion. Furthermore, knockdown of ${\beta}-catenin$ enhanced vimentin expression and decreased cytokeratin expression, whereas ${\beta}-catenin$ overexpression decreased vimentin expression and increased cytokeratin expression. These results suggest that EGF downregulates ${\beta}-catenin$ in a SMURF1-dependent manner and that ${\beta}-catenin$ downregulation contributes to EGF-induced cell migration and invasion in MDAMB breast cancer cells.

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