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Updated: Sep 26, 2025

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Transcription factor Runx2 changes the expression of some matricellular proteins in metastatic breast cancer cells

Sevgi Binay1, Engin Kaptan2

  • 1Faculty of Science, Department of Biology, Istanbul University, Vezneciler, 34134, Istanbul, Turkey.

Molecular Biology Reports
|April 20, 2022
PubMed
Abstract

Insights

Runx2 transcription factor regulates key proteins involved in breast cancer metastasis. Reducing Runx2 expression decreased metastasis-associated proteins and oncogenic pathway activity, suggesting Runx2

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Runx2, a runt-related gene, is overexpressed in human cancers, promoting metastasis.
  • Cancer metastasis involves extracellular matrix (ECM) modification and altered ECM-cell interactions.
  • Matricellular proteins like HPA1, LOX, SPARC, and OPN play crucial roles in ECM dynamics.

Purpose of the Study:

  • Investigate Runx2's effect on matricellular protein expression in human breast cancer.
  • Analyze Runx2's impact on oncogenic pathways (Akt, Erk, FAK) and c-jun.
  • Determine Runx2's role in regulating breast cancer cell metastasis.

Main Methods:

  • Established a Runx2 knockdown model using siRNA in MDA-MB-231 breast cancer cells.
  • Quantified mRNA and protein expression of ECM proteins via qPCR and Western blotting.
  • Assessed activity of Akt, Erk, FAK pathways and c-jun protein levels.

Main Results:

  • Runx2 knockdown decreased mRNA and protein levels of HPA1, SPARC, and LOX.
  • No significant change was observed in OPN expression following Runx2 knockdown.
  • Reduced levels of phosphorylated Akt, Erk, FAK, and c-jun protein were detected.

Conclusions:

  • Runx2 significantly influences the expression of matricellular proteins critical for breast cancer metastasis.
  • Runx2 plays a role in regulating breast cancer cell invasion and metastasis.
  • Targeting Runx2 may offer a therapeutic strategy for controlling breast cancer progression.
Keywords:
Breast cancerHeparanaseLOXOsteopontinRunx2SPARC

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