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Updated: May 17, 2026

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
16:24

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells

Published on: February 21, 2014

The RUNX family in breast cancer: relationships with estrogen signaling

N-O Chimge1, B Frenkel

  • 1Department of Biochemistry and Molecular Biology, Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA 90033, USA. chimgee@usc.edu

Oncogene
|October 10, 2012
PubMed

Insights

RUNX proteins act as tumor suppressors or oncogenes in breast cancer (BCa). RUNX1 and RUNX3 inhibit BCa, while RUNX2 has context-dependent roles in metastasis, requiring patient selection for therapies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • RUNX proteins are master regulators with context-dependent roles in cancer.
  • Their involvement in breast cancer (BCa) ranges from tumor suppression to oncogenesis.
  • RUNX1 is predominant in breast epithelial cells and frequently mutated in BCa.

Purpose of the Study:

  • To review the evidence for RUNX family member roles in breast cancer.
  • To elucidate the dual roles of RUNX proteins as tumor suppressors and oncogenes in BCa.
  • To explore the implications of RUNX protein functions in BCa metastasis and therapeutic strategies.

Main Methods:

  • Review of existing literature and evidence on RUNX family members in breast cancer.
  • Analysis of somatic mutations in primary tumor biopsies.
  • Examination of gene inactivation and haploinsufficiency studies in mouse models.
  • Investigation of interactions with estrogen signaling pathways.

Main Results:

  • RUNX1 and RUNX3 exhibit tumor suppressor activities in BCa, partly via antagonism of estrogen signaling.
  • RUNX2, while a tumor suppressor in some contexts, is implicated in BCa metastasis, particularly bone metastasis.
  • Estrogen inhibition of RUNX2 may contribute to its context-dependent anti-metastatic roles in non-osseous sites.
  • Estrogen receptor alpha (ERα) is linked to increased skeletal dissemination of BCa cells.

Conclusions:

  • RUNX proteins have complex, context-dependent roles in breast cancer progression and metastasis.
  • RUNX1 and RUNX3 function as tumor suppressors, while RUNX2 has paradoxical roles in metastasis.
  • Understanding RUNX protein functions and their interaction with estrogen signaling is crucial for BCa treatment.
  • Future RUNX-based therapies will necessitate careful patient stratification based on BCa subtype and expression patterns.

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