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

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Published on: January 12, 2020

Aberrant activation of notch signaling in human breast cancer

Spyros Stylianou1, Rob B Clarke, Keith Brennan

  • 1Wellcome Trust Centre for Cell Matrix Research, Faculty of Life Sciences, University of Manchester, Christie Hospital NHS Trust, Manchester M13 9PT, United Kingdom.

Cancer Research
|February 3, 2006
PubMed

Insights

Notch signaling is frequently activated in human breast cancer, promoting tumor growth by suppressing apoptosis. Inhibiting this pathway may offer a new therapeutic strategy for breast cancer treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cellular Signaling

Background:

  • Notch signaling's role in breast cancer is suggested by murine models and Numb expression loss in human carcinomas.
  • The precise frequency and mechanism of Notch pathway activation in human breast tumors remain unclear.

Purpose of the Study:

  • To investigate the prevalence of Notch signaling activation in human breast carcinomas.
  • To elucidate the mechanism by which Notch signaling contributes to cellular transformation in breast cancer.
  • To evaluate the therapeutic potential of inhibiting Notch signaling in breast cancer.

Main Methods:

  • Detection of intracellular Notch1 domain accumulation in human breast carcinomas.
  • Assessment of RBP-Jkappa-dependent Notch signaling in normal breast epithelial cell transformation.
  • Evaluation of Notch signaling attenuation effects on transformed human breast cancer cell lines.

Main Results:

  • Increased Notch signaling, indicated by intracellular Notch1 domain accumulation, was observed in diverse human breast carcinomas.
  • Activated RBP-Jkappa-dependent Notch signaling induced transformation of normal breast epithelial cells, likely via apoptosis suppression.
  • Reducing Notch signaling reversed the transformed phenotype in human breast cancer cell lines.

Conclusions:

  • Notch signaling is frequently activated in human breast cancer.
  • This activation contributes to tumorigenesis, potentially by inhibiting apoptosis.
  • Targeting Notch signaling presents a promising therapeutic avenue for breast cancer.

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