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Updated: Jul 4, 2026

Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer
09:08

Integration of Bioinformatics Approaches and Experimental Validations to Understand the Role of Notch Signaling in Ovarian Cancer

Published on: January 12, 2020

Molecular dependence of estrogen receptor-negative breast cancer on a notch-survivin signaling axis

Connie W Lee1, Christopher M Raskett, Igor Prudovsky

  • 1Department of Cancer Biology and the Cancer Center, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.

Cancer Research
|July 3, 2008
PubMed

Insights

Estrogen receptor-negative breast cancer cells rely on Notch-survivin signaling for survival. Inhibiting this pathway halts tumor growth and induces apoptosis, offering a potential targeted therapy for aggressive breast cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Signaling

Background:

  • Estrogen receptor-negative (ER-) breast cancer represents a clinically aggressive subtype with poorly understood molecular drivers.
  • Understanding the molecular mechanisms is crucial for developing effective targeted therapies.

Purpose of the Study:

  • To investigate the role of Notch signaling in ER- breast cancer.
  • To determine the relationship between Notch signaling and survivin expression.
  • To evaluate the therapeutic potential of targeting the Notch-survivin pathway.

Main Methods:

  • Analysis of Notch signaling activation in ER- breast cancer cells.
  • Assessment of survivin (apoptosis inhibitor and cell cycle regulator) expression.
  • Inhibition of Notch signaling using a gamma-secretase inhibitor in vitro and in vivo.
  • Evaluation of tumor growth, apoptosis, and toxicity in mouse models.

Main Results:

  • Notch signaling activation up-regulates survivin transcription in ER- breast cancer cells.
  • Targeting Notch signaling suppresses survivin, induces apoptosis, and inhibits tumor growth in mice.
  • ER+ breast cancer cells and normal cells are insensitive to Notch stimulation.
  • Therapeutic inhibition showed no organ or systemic toxicity.

Conclusions:

  • ER- breast cancer cells exhibit a dependency on Notch-survivin signaling for their maintenance.
  • Targeting the Notch-survivin pathway is a promising strategy for individualized treatment of aggressive ER- breast cancer.

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