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Knockdown of ARK5 expression suppresses invasion of ovarian cancer cells

Shuxiao Wang1, Shuwei Li2, Hui Wang1

  • 1Department of Pharmacology, Weifang Medical University, Weifang, Shandong 261053, P.R. China.

Molecular Medicine Reports
|February 6, 2019
PubMed

Insights

The study reveals that ARK5 significantly enhances ovarian cancer cell invasion by promoting epithelial-mesenchymal transition (EMT) and activating the Akt-mTOR-MMPs pathway. Reducing ARK5 expression notably curtails cancer cell migration and invasion.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Ovarian cancer is a leading cause of cancer-related deaths in women.
  • Understanding the molecular mechanisms driving ovarian cancer cell invasion is crucial for developing effective therapies.
  • ARK5 (also known as PRKCA) has been implicated in various cellular processes, but its role in ovarian cancer invasion requires further elucidation.

Purpose of the Study:

  • To investigate the role and molecular mechanisms of ARK5 in ovarian cancer cell invasion.
  • To determine if ARK5 influences epithelial-mesenchymal transition (EMT) and related signaling pathways in ovarian cancer cells.

Main Methods:

  • ARK5-deficient SKOV3 ovarian cancer cells (siARK5/SKOV3) were established using RNA interference.
  • Reverse transcription-polymerase chain reaction (RT-PCR) and Western blot analysis were employed to assess gene and protein expression.
  • Cell migration and invasion assays were performed to evaluate cellular motility.
  • Epidermal growth factor-1 (EGF-1) stimulation was used to induce specific molecular responses.

Main Results:

  • Downregulation of ARK5 significantly reduced SKOV3 cell migration and invasion.
  • ARK5 deficiency suppressed EGF-1-induced expression of matrix metallopeptidase (MMP)-2 and MMP-9.
  • Epithelial-mesenchymal transition (EMT) and phosphorylation of mechanistic target of rapamycin kinase (mTOR) were inhibited in ARK5-deficient cells.

Conclusions:

  • ARK5 is a critical factor promoting ovarian cancer cell invasion.
  • ARK5 enhances invasive potential by facilitating EMT and activating the Akt-mTOR-MMPs signaling pathway.
  • Targeting ARK5 may represent a potential therapeutic strategy for ovarian cancer.

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