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Updated: Jan 31, 2026

Comparison of Three Different Methods for Determining Cell Proliferation in Breast Cancer Cell Lines
12:35

Comparison of Three Different Methods for Determining Cell Proliferation in Breast Cancer Cell Lines

Published on: September 3, 2016

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SUMOylation machinery protein, PIAS4 role in breast cancer cell proliferation and drug sensitivity

Mohammed A M Salih1,2,3, Mohamed M A E L Salem4, Muhammad Ali Shahid1

  • 1Institute of Cancer Therapeutics, University of Bradford, Bradford, UK.

Molecular Biology Reports
|January 30, 2026
PubMed
Abstract

Insights

PIAS4 protein may overcome doxorubicin resistance in breast cancer by reducing cell survival and invasiveness. This finding suggests PIAS4 as a potential therapeutic target for improving chemotherapy effectiveness.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Breast cancer presents a significant global health challenge, with doxorubicin (DOX) resistance impeding effective treatment.
  • SUMOylation, a post-translational modification, is implicated in cancer progression and therapy resistance.
  • PIAS4, a SUMO E3 ligase, is involved in genome stability and stress response, but its role in breast cancer and DOX resistance is unclear.

Purpose of the Study:

  • To investigate the role of PIAS4 in mediating doxorubicin resistance in breast cancer.
  • To explore PIAS4's function in breast cancer progression and its impact on chemoresistance.

Main Methods:

  • Quantitative PCR (qPCR) to compare SUMOylation gene expression in naked mole-rats (NMRs) and breast cancer cells (MCF-7).
  • Functional studies in MCF-7 cells overexpressing PIAS4 to assess proliferation, invasion, and drug sensitivity.
  • Western blot analysis to examine protein expression changes, including Bcl-2, after doxorubicin treatment.

Main Results:

  • PIAS4 exhibited higher expression in NMR intestinal tissue compared to MCF-7 cells.
  • Overexpression of PIAS4 in MCF-7 cells significantly reduced colony formation, invasiveness, and doxorubicin resistance.
  • Doxorubicin treatment led to downregulated Bcl-2 protein levels in PIAS4-overexpressing cells, suggesting a role in apoptosis.

Conclusions:

  • PIAS4 expression influences breast cancer cell survival, invasiveness, and chemoresistance, partly through modulation of anti-apoptotic pathways.
  • PIAS4 emerges as a potential biomarker for predicting treatment response.
  • Targeting PIAS4 could be a therapeutic strategy to overcome anthracycline resistance in breast cancer.
Keywords:
Breast cancerMCF-7Naked mole-ratPIAS4SUMOylation

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