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Cellular Oncology

, Volume 37, Issue 4, pp 289–296 | Cite as

ARID3B expression in primary breast cancers and breast cancer-derived cell lines

  • Ayse Selcen Oguz Erdogan
  • Nihan Ozdemirler
  • Merve Oyken
  • Murat Alper
  • Ayse Elif Erson-BensanEmail author
Original Paper

Abstract

Background

ARID3B (AT-rich interaction domain 3) is a member of the family of ARID proteins, which constitutes evolutionarily conserved transcription factors implicated in normal development, differentiation, cell cycle regulation and chromatin remodeling. In addition, ARID3B has been linked to cellular immortalization, epithelial-mesenchymal transition (EMT) and tumorigenesis. Given the emerging role of ARID3B in tumor development, we examined its expression in primary patient-derived breast cancer samples and breast cancer-derived cell lines.

Methods

Immunohistochemistry (IHC) was used to detect ARID3B expression in 63 formalin-fixed paraffin-embedded (FFPE) invasive breast cancer samples. In addition, a panel of 6 (estrogen receptor-positive and -negative, ERBB2-positive and -negative) breast cancer-derived cell lines and immortalized non-tumorigenic epithelial breast cells were used for ARID3B expression analysis using RT-PCR. Specific primers and Western blotting were used to detect ARID3B isoforms.

Results

Using IHC, nuclear, cytoplasmic and low levels of membranous ARID3B staining were detected in all 63 primary invasive breast tumors. Nuclear ARID3B staining positively correlated with estrogen receptor (ER) status and negatively correlated with tumor grade, mitotic index and ERBB2 status of the patients. Increased nuclear expression of ARID3B was confirmed in breast cancer-derived cell lines expressing ERα. In addition, two out of three ERBB2-positive breast cancer cell lines were found to lack full length ARID3B. Three ARID3B isoforms were found to be present in normal breast epithelial cells as well as in breast cancer cells.

Conclusion

We report a positive correlation between ER positivity and nuclear ARID3B expression in primary breast cancers, along with a negative correlation with the ERBB2 status. Very similar correlations were noted in breast cancer-derived cell lines. Since in the recent past ARID3B expression has increasingly been related to cancer-associated proteins and microRNAs, knowledge on ARID3B expression and function may be instrumental for gaining further insight into potentially important cancer-related networks.

Keywords

ARID3B expression Breast cancer Estrogen receptor ERBB2 

Notes

Acknowledgments

Orta Dogu Teknik Universitesi (ODTU-METU) and Diskapi Yildirim Beyazit Training and Research Hospital scientific research funds were used throughout the study.

Conflict of interest

Authors have no conflict of interest to declare.

Supplementary material

13402_2014_185_MOESM1_ESM.pdf (683 kb)
ESM 1 (PDF 682 kb)

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Copyright information

© International Society for Cellular Oncology 2014

Authors and Affiliations

  • Ayse Selcen Oguz Erdogan
    • 1
    • 2
  • Nihan Ozdemirler
    • 1
  • Merve Oyken
    • 1
  • Murat Alper
    • 2
  • Ayse Elif Erson-Bensan
    • 1
    Email author
  1. 1.Department of Biological SciencesMETUAnkaraTurkey
  2. 2.Department of PathologyDiskapi Yildirim Beyazit Training and Research HospitalAnkaraTurkey

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