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Updated: Sep 27, 2026

Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
Growth factor receptors in breast cancer: potential for therapeutic intervention
Rita Nahta1, Gabriel N Hortobágyi, Francisco J Esteva
1Department of Breast Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
Abstract:
Increased expression and activation of receptor tyrosine kinases occurs frequently in human breast carcinomas. Several therapies targeting these receptors are currently in clinical trials. Therapeutic strategies include blockade of individual receptors with monoclonal antibodies and inhibition of tyrosine kinase function. Trastuzumab is the first of these biologic therapies to be approved for patients with human epidermal growth factor receptor 2 (HER2)-overexpressing metastatic breast cancer. Novel trastuzumab-based combinations are being investigated in patients with advanced breast cancer. Large clinical trials have also been launched in the adjuvant setting. Small molecules that inhibit specific tyrosine kinases (e.g., epidermal growth factor receptor, HER2) are in phase I and phase II clinical trials. Other growth-factor-targeted drugs that have reached clinical development include STI571 and antibodies directed at the insulin-like growth factor pathway. Biologic therapies directed against these important receptors are promising. In this review we discuss challenges and opportunities for the development of growth-factor-targeted approaches for the treatment of breast cancer.
Insights
Targeted therapies for breast cancer, including monoclonal antibodies and small molecules, show promise. Research focuses on receptor tyrosine kinases like human epidermal growth factor receptor 2 (HER2) for advanced and adjuvant treatments.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Receptor tyrosine kinases are frequently overexpressed and activated in human breast carcinomas.
- Targeting these kinases is a key strategy in breast cancer treatment.
Purpose of the Study:
- To review the challenges and opportunities in developing growth-factor-targeted therapies for breast cancer.
- To discuss current and emerging therapeutic strategies including monoclonal antibodies and small molecule inhibitors.
Main Methods:
- Review of clinical trials and drug development pipelines.
- Analysis of targeted therapies focusing on receptor tyrosine kinases (e.g., HER2, EGFR).
Main Results:
- Trastuzumab, a HER2-targeting antibody, is approved for HER2-overexpressing metastatic breast cancer.
- Numerous therapies, including small molecules and antibodies targeting growth factor pathways, are in various clinical trial phases (I-III).
Conclusions:
- Growth-factor-targeted therapies, including biologic agents and small molecules, represent a promising avenue for breast cancer treatment.
- Further research and clinical trials are essential to overcome challenges and optimize these targeted approaches for improved patient outcomes.
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