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Published on: January 12, 2020
Notch Signaling in Breast Tumor Microenvironment as Mediator of Drug Resistance
Adele Chimento1, Maria D'Amico1,2, Vincenzo Pezzi1
1Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy.
Abstract:
Notch signaling dysregulation encourages breast cancer progression through different mechanisms such as stem cell maintenance, cell proliferation and migration/invasion. Furthermore, Notch is a crucial driver regulating juxtracrine and paracrine communications between tumor and stroma. The complex interplay between the abnormal Notch pathway orchestrating the activation of other signals and cellular heterogeneity contribute towards remodeling of the tumor microenvironment. These changes, together with tumor evolution and treatment pressure, drive breast cancer drug resistance. Preclinical studies have shown that targeting the Notch pathway can prevent or reverse resistance, reducing or eliminating breast cancer stem cells. In the present review, we will summarize the current scientific evidence that highlights the involvement of Notch activation within the breast tumor microenvironment, angiogenesis, extracellular matrix remodeling, and tumor/stroma/immune system interplay and its involvement in mechanisms of therapy resistance.
Insights
Notch signaling promotes breast cancer progression and drug resistance by affecting the tumor microenvironment. Targeting Notch may reverse resistance and reduce cancer stem cells.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Notch signaling pathway dysregulation drives breast cancer progression.
- Notch signaling influences tumor-stroma interactions and cellular heterogeneity.
- Aberrant Notch activation contributes to breast cancer drug resistance.
Purpose of the Study:
- To review the role of Notch activation in the breast tumor microenvironment.
- To summarize Notch signaling's involvement in angiogenesis, extracellular matrix remodeling, and immune system interplay.
- To highlight Notch's contribution to therapy resistance mechanisms.
Main Methods:
- Literature review of preclinical studies and scientific evidence.
- Analysis of Notch pathway's role in breast cancer progression and resistance.
- Synthesis of current research on Notch signaling in the tumor microenvironment.
Main Results:
- Notch signaling promotes stem cell maintenance, proliferation, and migration.
- Notch pathway dysregulation remodels the tumor microenvironment, fostering resistance.
- Targeting Notch shows potential in preventing or reversing drug resistance.
Conclusions:
- Notch signaling is a key driver of breast cancer progression and therapy resistance.
- Understanding Notch's role in the tumor microenvironment is crucial for developing new therapies.
- Targeting Notch signaling presents a promising strategy to overcome breast cancer drug resistance.
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