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Updated: Jun 21, 2025

A Novel Stromal Fibroblast-Modulated 3D Tumor Spheroid Model for Studying Tumor-Stroma Interaction and Drug Discovery
Published on: February 28, 2020
Functional and clinical roles of stromal PDGF receptors in tumor biology
Carina Strell1,2, Elisabet Rodríguez-Tomàs3, Arne Östman4,5
1Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
Abstract:
PDGF receptors play pivotal roles in both developmental and physiological processes through the regulation of mesenchymal cells involved in paracrine instructive interactions with epithelial or endothelial cells. Tumor biology studies, alongside analyses of patient tissue samples, provide strong indications that the PDGF signaling pathways are also critical in various types of human cancer. This review summarizes experimental findings and correlative studies, which have explored the biological mechanisms and clinical relevance of PDGFRs in mesenchymal cells of the tumor microenvironment. Collectively, these studies support the overall concept that the PDGF system is a critical regulator of tumor growth, metastasis, and drug efficacy, suggesting yet unexploited targeting opportunities. The inter-patient variability in stromal PDGFR expression, as being linked to prognosis and treatment responses, not only indicates the need for stratified approaches in upcoming therapeutic investigations but also implies the potential for the development of PDGFRs as biomarkers of clinical utility, interestingly also in settings outside PDGFR-directed treatments.
Insights
Platelet-derived growth factor receptors (PDGFRs) are crucial in cancer development and progression. Targeting PDGFRs in the tumor microenvironment offers new therapeutic strategies and potential biomarker applications.
Area of Science:
- Oncology
- Cell Biology
- Molecular Biology
Background:
- Platelet-derived growth factor receptors (PDGFRs) regulate mesenchymal cells, crucial for tissue development and physiological functions.
- PDGF signaling pathways are implicated in the pathogenesis of various human cancers.
- Mesenchymal cells within the tumor microenvironment play a significant role in cancer progression.
Purpose of the Study:
- To review the biological mechanisms and clinical relevance of PDGFRs in mesenchymal cells of the tumor microenvironment.
- To explore the role of PDGF signaling in tumor growth, metastasis, and drug efficacy.
- To discuss the potential of PDGFRs as biomarkers for prognosis and treatment response.
Main Methods:
- Review of experimental findings and correlative studies on PDGFRs in cancer.
- Analysis of biological mechanisms underlying PDGF signaling in the tumor microenvironment.
- Examination of clinical relevance and patient tissue sample data.
Main Results:
- PDGF system critically regulates tumor growth, metastasis, and drug efficacy.
- Inter-patient variability in stromal PDGFR expression correlates with prognosis and treatment responses.
- PDGFRs present unexploited targeting opportunities in cancer therapy.
Conclusions:
- The PDGF system is a key regulator in the tumor microenvironment, impacting tumor progression and treatment outcomes.
- Stratified therapeutic approaches and PDGFR-based biomarkers are warranted for clinical utility.
- PDGFRs may serve as biomarkers even in treatments not directly targeting these receptors.
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