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Studying TGF-β Signaling and TGF-β-induced Epithelial-to-mesenchymal Transition in Breast Cancer and Normal Cells
Published on: October 27, 2020
Clinical utilities of platelet-derived growth factor signaling in breast cancer
Jesse J Reardon1, Alexis A Mossing1, Rebecca L Packard1
1The Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA; Department of Radiation Oncology, The Ohio State University, Columbus, Ohio 43210, USA.
Abstract:
Platelet-derived growth factors (PDGFs) and their cognate receptors (PDGFRα/β) play critical roles in breast cancer progression and metastasis. This review summarizes current evidence of PDGF ligand and receptor expression patterns, oncogenic functions, prognostic significance and therapeutic targetability, with a specific focus on small molecule inhibition. PDGF-PDGFR signaling is known to contribute to epithelial to mesenchymal transition, cancer stem cell maintenance, desmoplasia, angiogenesis, and immune modulation. Additionally, the four PDGF ligands have distinct oncogenic functions. PDGFA and PDGFB have been implicated in breast cancer associated brain metastasis, while PDGFC has been shown to play a crucial role in fibroblast activation. PDGFD, while less studied, may activate epithelial to mesenchymal transition in breast cancer. High expression of PDGFA, PDGFB, PDGFC, and stromal PDGFRβ correlate with poor patient survival, highlighting their potential as candidate biomarkers. We specifically focus on evaluating current therapeutic strategies which target the PDGF-PDGFR axis, including neutralizing antibodies, aptamers, and small molecule inhibitors, which show preclinical promise but limited clinical success in breast cancer to date. We discuss future research directions with emphasis on identifying selective inhibitors, utilizing PDGF-PDGFR signaling components for patient stratification, and combination with immunotherapies.
Insights
Platelet-derived growth factors (PDGFs) and their receptors (PDGFRs) drive breast cancer growth and metastasis. Targeting this PDGF-PDGFR signaling pathway shows promise for new breast cancer therapies and biomarkers.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Platelet-derived growth factors (PDGFs) and their receptors (PDGFRα/β) are crucial in breast cancer progression and metastasis.
- PDGF-PDGFR signaling influences epithelial-to-mesenchymal transition, cancer stem cells, desmoplasia, angiogenesis, and immune responses.
Purpose of the Study:
- To review current evidence on PDGF and PDGFR expression, functions, and prognostic value in breast cancer.
- To evaluate therapeutic strategies targeting the PDGF-PDGFR axis, particularly small molecule inhibitors.
- To identify future research directions for targeting this pathway in breast cancer.
Main Methods:
- Literature review of studies on PDGF ligand and PDGFR expression patterns.
- Analysis of oncogenic functions and prognostic significance of PDGF-PDGFR signaling.
- Evaluation of preclinical and clinical data for therapeutic interventions targeting PDGF-PDGFR.
Main Results:
- Distinct oncogenic roles for PDGFA, PDGFB, PD সার্বিক, and PDGFD in breast cancer, including brain metastasis and fibroblast activation.
- High expression of PDGFA, PDGFB, PDGFC, and stromal PDGFRβ correlates with poor patient survival, indicating biomarker potential.
- Targeting the PDGF-PDGFR axis with inhibitors shows preclinical promise but limited clinical success.
Conclusions:
- PDGF-PDGFR signaling is a significant driver of breast cancer progression and metastasis.
- Further research is needed to develop selective inhibitors and utilize PDGF-PDGFR components for patient stratification and combination immunotherapies.
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