PAK5 promotes the migration and invasion of cervical cancer cells by phosphorylating SATB1

Cell Death Differ. 2019 Jun;26(6):994-1006. doi: 10.1038/s41418-018-0178-4. Epub 2018 Aug 6.

Abstract

p21-activated kinase 5 (PAK5) is involved in several oncogenic signaling pathways and its amplification or overexpression has been found in various types of cancer; however, the pathophysiologic role of PAK5 in cervical cancer (CC) remains elusive. This study aims to elucidate the effects of PAK5 on CC metastasis and its specific regulation mechanism. We performed western blotting and immunohistochemistry (IHC) analysis and found that the expression levels of PAK5 were significantly upregulated in CC cells and tissues. In addition, statistical analysis via IHC showed that increased PAK5 significantly correlated with CC progression. Mn2+-Phos-tag SDS-PAGE, western blotting, immunofluorescence and dual luciferase reporter assays were utilized to determine the involvement of SATB1 in PAK5-mediated epithelial-mesenchymal transition (EMT). We found that PAK5-mediated special AT-rich binding protein-1 (SATB1) phosphorylation on Ser47 initiated EMT cascade and promoted migration and invasion of CC cells. Furthermore, overexpression of PAK5 induced lung metastasis of CC cells in xenograft modes. Taken together, we conclude that PAK5 is a novel prognostic indicator and plays an important role in the CC metastasis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Movement
  • Cell Proliferation
  • Female
  • HeLa Cells
  • Humans
  • Matrix Attachment Region Binding Proteins / metabolism*
  • Phosphorylation
  • Tumor Cells, Cultured
  • Uterine Cervical Neoplasms / metabolism*
  • Uterine Cervical Neoplasms / pathology
  • Wound Healing
  • p21-Activated Kinases / metabolism*

Substances

  • Matrix Attachment Region Binding Proteins
  • SATB1 protein, human
  • PAK5 protein, human
  • p21-Activated Kinases