Novel Pathways for Targeting Tumor Angiogenesis in Metastatic Breast Cancer
Jordan A Harry1, Mark L Ormiston1,2,3
1Department of Medicine, Queen's University, Kingston, ON, Canada.
Abstract:
Breast cancer is the most common cancer affecting women and is the second leading cause of cancer related death worldwide. Angiogenesis, the process of new blood vessel development from pre-existing vasculature, has been implicated in the growth, progression, and metastasis of cancer. Tumor angiogenesis has been explored as a key therapeutic target for decades, as the blockade of this process holds the potential to reduce the oxygen and nutrient supplies that are required for tumor growth. However, many existing anti-angiogenic approaches, such as those targeting Vascular Endothelial Growth Factor, Notch, and Angiopoietin signaling, have been associated with severe side-effects, limited survival advantage, and enhanced cancer regrowth rates. To address these setbacks, alternative pathways involved in the regulation of tumor angiogenesis are being explored, including those involving Bone Morphogenetic Protein-9 signaling, the Sonic Hedgehog pathway, Cyclooxygenase-2, p38-mitogen-activated protein kinase, and Chemokine Ligand 18. This review article will introduce the concept of tumor angiogenesis in the context of breast cancer, followed by an overview of current anti-angiogenic therapies, associated resistance mechanisms and novel therapeutic targets.
Insights
Breast cancer angiogenesis fuels tumor growth. Current therapies face limitations, prompting exploration of novel targets like Bone Morphogenetic Protein-9 and Sonic Hedgehog pathways for improved breast cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Breast cancer is a leading cause of cancer death globally.
- Tumor angiogenesis, essential for cancer growth and metastasis, is a key therapeutic target.
- Existing anti-angiogenic therapies targeting VEGF, Notch, and Angiopoietin signaling show limitations including side-effects and resistance.
Purpose of the Study:
- To review the role of tumor angiogenesis in breast cancer.
- To provide an overview of current anti-angiogenic therapies and their resistance mechanisms.
- To highlight novel therapeutic targets for breast cancer angiogenesis.
Main Methods:
- Literature review of tumor angiogenesis in breast cancer.
- Analysis of current anti-angiogenic therapies and resistance mechanisms.
- Identification and discussion of emerging therapeutic targets.
Main Results:
- Tumor angiogenesis is critical for breast cancer progression.
- Current anti-angiogenic therapies have significant drawbacks.
- Alternative pathways like BMP-9, Sonic Hedgehog, COX-2, p38 MAPK, and CCL18 are promising targets.
Conclusions:
- Novel therapeutic strategies targeting alternative angiogenesis pathways are needed for breast cancer.
- Understanding resistance mechanisms is crucial for developing effective anti-angiogenic treatments.
- Exploring pathways beyond VEGF, Notch, and Angiopoietin offers new hope for breast cancer patients.
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