A novel regulatory function of CDKN1A/p21 in TNFα-induced matrix metalloproteinase 9-dependent migration and invasion of triple-negative breast cancer cells

Cell Signal. 2018 Jul:47:27-36. doi: 10.1016/j.cellsig.2018.03.010. Epub 2018 Mar 26.

Abstract

Metastasis is the leading cause of mortality in patients with highly invasive cancers and, as such, is a major problem for medicine. It has been increasingly recognized that cancer-related inflammation plays an important role in promoting invasion and the metastatic process in which cell motility and upregulation of proteolytic enzymes are crucial events. TNFα is a proinflammatory cytokine known to stimulate synthesis of MMP9, a zinc- and calcium-dependent endopeptidase contributing to the regulation of ECM remodeling and cell signaling. However, the precise molecular mechanism of TNFα-induced MMP9 gene expression in cancers is still not fully understood. This study shows that TNFα-induced cell migration and invasion involve ERK1/2-dependent up-regulation of CDKN1A/p21 expression in highly aggressive breast cancer cells and that CDKN1A/p21 plays an important regulatory role in TNFα-induced MMP9 gene expression, indicating an unknown function of CDKN1A/p21 as a regulator of proteolytic activity in cancer cells.

Keywords: Breast cancer; CDKN1A/p21((WAF1/CIP1/SDI1)); Cell migration; MMP9; TNFα.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor
  • Cell Movement / drug effects
  • Cyclin-Dependent Kinase Inhibitor p21 / antagonists & inhibitors
  • Cyclin-Dependent Kinase Inhibitor p21 / genetics
  • Cyclin-Dependent Kinase Inhibitor p21 / metabolism*
  • Female
  • Humans
  • Matrix Metalloproteinase 9 / metabolism*
  • Mitogen-Activated Protein Kinase 1 / metabolism
  • Mitogen-Activated Protein Kinase 3 / metabolism
  • Phosphorylation / drug effects
  • RNA Interference
  • RNA, Small Interfering / metabolism
  • Signal Transduction / drug effects
  • Triple Negative Breast Neoplasms / metabolism
  • Triple Negative Breast Neoplasms / pathology
  • Tumor Necrosis Factor-alpha / pharmacology*
  • Up-Regulation / drug effects*

Substances

  • Cyclin-Dependent Kinase Inhibitor p21
  • RNA, Small Interfering
  • Tumor Necrosis Factor-alpha
  • Mitogen-Activated Protein Kinase 1
  • Mitogen-Activated Protein Kinase 3
  • Matrix Metalloproteinase 9