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Updated: Jan 21, 2026

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Published on: January 12, 2020
Notch signaling in breast cancer: From pathway analysis to therapy
B Madhu Krishna1, Samir Jana1, Jyotsana Singhal1
1Department of Medical Oncology, Beckman Research Institute of City of Hope, Comprehensive Cancer Center and National Medical Center, Duarte, CA, 91010, USA.
Abstract:
The Notch signaling pathway, which is highly conserved from sea urchins to humans, plays an important role in cell-differentiation, survival, proliferation, stem-cell renewal, and determining cell fate during development and morphogenesis. It is well established that signaling pathways are dysregulated in a wide-range of diseases, including human malignancies. Studies suggest that the dysregulation of the Notch pathway contributes to carcinogenesis, cancer stem cell renewal, angiogenesis, and chemo-resistance. Elevated levels of Notch receptors and ligands have been associated with cancer-progression and poor survival. Furthermore, the Notch signaling pathway regulates the transcriptional activity of key target genes through crosstalk with several other signaling pathways. Indeed, increasing evidence suggests that the Notch signaling pathway may serve as a therapeutic target for the treatment of several cancers, including breast cancer. Researchers have demonstrated the anti-tumor properties of Notch inhibitors in various cancer types. Currently, Notch inhibitors are being evaluated for anticancer efficacy in a number of clinical-trials. However, because there are multiple Notch receptors that can exhibit either oncogenic or tumor-suppressing roles in various cells, it is important that the Notch inhibitors are specific to particular receptors that are tumorigenic in nature. This review critically evaluates existing Notch inhibitory drugs and strategies and summarizes the previous discoveries, current understandings, and recent developments in support of Notch receptors as therapeutic targets in breast cancer.
Insights
The Notch signaling pathway is crucial for cell development but often dysregulated in cancer. This review explores Notch inhibitors as a targeted therapy for breast cancer, highlighting their anti-tumor potential.
Area of Science:
- Molecular Biology
- Developmental Biology
- Oncology
Background:
- The Notch signaling pathway is a conserved mechanism regulating cell differentiation, proliferation, and fate determination.
- Dysregulation of Notch signaling is implicated in various cancers, contributing to carcinogenesis, angiogenesis, and chemoresistance.
- Elevated Notch receptors and ligands correlate with cancer progression and reduced patient survival.
Purpose of the Study:
- To review the role of Notch signaling in breast cancer.
- To evaluate Notch inhibitors as a therapeutic strategy for breast cancer.
- To summarize current understanding and recent developments in targeting Notch receptors for breast cancer treatment.
Main Methods:
- Literature review of existing Notch inhibitory drugs and strategies.
- Analysis of Notch pathway's role in cancer stem cell renewal, angiogenesis, and chemoresistance.
- Evaluation of Notch inhibitors' anti-tumor properties in various cancer types and clinical trials.
Main Results:
- Notch signaling pathway dysregulation contributes to breast cancer development and progression.
- Notch inhibitors demonstrate anti-tumor properties and are under clinical investigation.
- Specificity of Notch inhibitors is crucial due to the dual role of Notch receptors (oncogenic or tumor-suppressive).
Conclusions:
- The Notch signaling pathway presents a promising therapeutic target for breast cancer.
- Targeted inhibition of oncogenic Notch receptors offers a potential strategy for breast cancer treatment.
- Further research and clinical trials are necessary to optimize Notch inhibitor therapy for breast cancer.
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