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The pro-apoptotic role of autophagy in breast cancer

S Suman1, T P Das1, R Reddy2

  • 11] Department of Biomedical Sciences, Paul L Foster school of Medicine, Texas Tech University Health Sciences center, El Paso, TX, USA [2] Department of Urology, University of Louisville, KY 40202, USA.

British Journal of Cancer
|June 20, 2014
PubMed
Abstract

Insights

Autophagy marker LC3B is highly expressed in breast cancer (BCa). The herbal compound nimocinol acetate (NA) activates LC3B, suppressing BCa cell growth and showing potential as a BCa treatment.

Area of Science:

  • Oncology
  • Cell Biology
  • Pharmacology

Background:

  • Autophagy plays a critical role in cancer progression and treatment response.
  • Targeting autophagy with chemotherapeutic agents can inhibit cancer growth.
  • This study investigates autophagy's role in breast cancer (BCa).

Purpose of the Study:

  • To examine the expression of autophagy marker LC3B in BCa patients and cell lines.
  • To evaluate the effect of nimocinol acetate (NA) on autophagy activation and BCa cell growth.

Main Methods:

  • Tissue microarray analysis of LC3B expression in BCa tissues.
  • Treatment of BCa cell lines with nimocinol acetate (NA) to modulate autophagy.
  • Phenotypic and molecular analyses to assess anticancer activity.

Main Results:

  • LC3B expression is significantly higher in BCa tumors compared to normal tissues.
  • NA treatment upregulated LC3B, leading to increased autophagy vesicles and autolysosomes in BCa cells.
  • NA inhibited mTOR signaling, suppressed BCa cell growth without affecting normal cells, and its effects were dependent on LC3B.

Conclusions:

  • Elevated LC3B expression in BCa tissues suggests its role in cancer progression.
  • Increased LC3B activation by NA promotes apoptosis and suppresses BCa cell growth.
  • Nimocinol acetate demonstrates potential as a therapeutic agent for breast cancer.

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