GO:0036119 response to platelet-derived growth factor: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0036119 describes any cellular or organismal change in state or activity caused by a platelet-derived growth factor (PDGF) stimulus.
• PDGF ligands (PDGFA, PDGFB, PDGFC, PDGFD) signal through PDGF receptors (PDGFRA, PDGFRB), which are receptor tyrosine kinases.
• The response controls proliferation, migration, survival, and extracellular matrix production in mesenchymal cells such as fibroblasts, smooth muscle cells, and osteoblasts.
• Dysregulated PDGF signaling is implicated in cancers, fibrosis, atherosclerosis, and intracerebral hemorrhage.
• Key experimental models include knockout, point-mutation, knock-in, and overexpression cell lines, plus CRISPR library screening.
• Studying GO:0036119 helps identify therapeutic targets for diseases driven by aberrant PDGF signaling.
Description
Platelet-derived growth factor (PDGF) is a family of growth factors that regulate a wide range of cellular responses, including proliferation, migration, survival, and extracellular matrix synthesis. The Gene Ontology term GO:0036119, response to platelet-derived growth factor, captures any process that results in a change in state or activity of a cell or an organism as a result of a PDGF stimulus. This term is essential for annotating genes and pathways involved in mesenchymal cell biology and disease. PDGF signaling is critical during embryonic development, wound healing, and tissue homeostasis, but its dysregulation contributes to pathological conditions such as cancer, fibrosis, and vascular diseases. Researchers studying GO:0036119 aim to understand how cells sense and respond to PDGF, and how these responses can be modulated therapeutically. The term encompasses diverse downstream events, from immediate receptor autophosphorylation to long-term changes in gene expression and cell behavior. Given its broad impact, GO:0036119 serves as a hub for integrating experimental data from knockout, knock-in, and overexpression models, as well as high-throughput screens. This article provides a comprehensive overview of the term, its molecular players, disease relevance, and research methodologies.
response to platelet-derived growth factor At A Glance
| GO ID | GO:0036119 |
|---|---|
| GO term | response to platelet-derived growth factor |
| Ontology | biological_process |
| Synonym | response to PDGF stimulus, response to platelet-derived growth factor stimulus |
| Major function | Mediates cellular responses to PDGF, including proliferation, migration, survival, and matrix production |
| Key ligands | PDGFA, PDGFB, PDGFC, PDGFD |
| Key receptors | PDGFRA, PDGFRB |
| Downstream pathways | PI3K-AKT, MAPK, PLCγ, JAK-STAT |
| Disease relevance | Cancer, fibrosis, atherosclerosis, intracerebral hemorrhage |
What Is GO:0036119?
GO:0036119, response to platelet-derived growth factor, is defined as any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a platelet-derived growth factor stimulus. It includes the immediate signaling events triggered by PDGF binding to its receptors, as well as the downstream cellular outcomes such as proliferation, migration, and differentiation.
Why Is response to platelet-derived growth factor Important in Cell Biology?
Understanding GO:0036119 is crucial because PDGF signaling is a fundamental driver of mesenchymal cell biology and is frequently dysregulated in human diseases. It plays central roles in development, wound healing, and tissue repair, but aberrant activation contributes to tumor progression, fibrosis, and vascular pathologies. Targeting this response has therapeutic potential, and model systems that manipulate PDGF pathway components are essential for preclinical research.
• PDGF signaling controls proliferation and migration of fibroblasts, smooth muscle cells, and other mesenchymal cells.
• It is essential for embryonic development, particularly in blood vessel formation and organogenesis.
• Dysregulated PDGF signaling is a hallmark of many cancers, including glioblastoma and sarcomas.
• PDGF contributes to fibrotic diseases such as pulmonary fibrosis and liver cirrhosis.
• It plays a role in atherosclerosis and restenosis after vascular injury.
• PDGF is involved in intracerebral hemorrhage and neuroinflammation.
• High glucose induces PDGF-C in mesangial cells, linking PDGF to diabetic nephropathy.
• Osteoblasts synthesize and respond to PDGF, affecting bone remodeling.
• PDGFR/PDGF system is a prognostic and treatment response biomarker in cancers.
• Studying GO:0036119 aids in developing targeted therapies for these conditions.
What Happens During response to platelet-derived growth factor?
PDGF Ligand Binding and Receptor Activation
In simple terms: PDGF molecules bind to receptors on the cell surface, turning them on.
The response begins when PDGF ligands (PDGFA, PDGFB, PDGFC, PDGFD) bind to their cognate receptors, PDGFRA and PDGFRB, which are receptor tyrosine kinases. This binding induces receptor dimerization and autophosphorylation, creating docking sites for downstream signaling proteins.
Intracellular Signaling Cascades
In simple terms: Activated receptors trigger a chain of signals inside the cell.
Phosphorylated receptors recruit and activate multiple signaling pathways, including PI3K-AKT, MAPK/ERK, PLCγ-PKC, and JAK-STAT. These pathways propagate the signal to the nucleus and other cellular compartments, leading to changes in gene expression, cytoskeletal reorganization, and metabolism.
Cellular Responses: Proliferation, Migration, and Survival
In simple terms: The cell changes its behavior, such as dividing or moving.
Downstream signaling drives diverse cellular outcomes, including cell cycle progression, migration, survival, and extracellular matrix production. For example, PDGF stimulates osteoblast proliferation and matrix synthesis, and promotes fibroblast response to rigid collagen fibers.
Feedback Regulation and Termination
In simple terms: The cell has ways to shut off the signal to avoid overactivity.
The response is tightly regulated by negative feedback mechanisms, including receptor internalization, dephosphorylation, and induction of negative regulators such as SOCS proteins. Dysregulation of these feedback loops can lead to sustained PDGF signaling and disease.
Key Genes Involved in GO:0036119 response to platelet-derived growth factor
The following genes encode the core components of the PDGF ligand and receptor families, as well as key downstream effectors involved in GO:0036119.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PDGFA | PDGF ligand, binds PDGFRA | Knockout models show developmental defects; implicated in cancer and fibrosis |
| PDGFB | PDGF ligand, binds PDGFRB | Essential for vascular development; linked to glioblastoma and atherosclerosis |
| PDGFC | PDGF ligand, binds PDGFRA | Induced by high glucose in mesangial cells; role in diabetic nephropathy |
| PDGFD | PDGF ligand, binds PDGFRB | Implicated in fibrosis and cancer progression |
| PDGFRA | Receptor tyrosine kinase for PDGF-A/C | Mutations in gastrointestinal stromal tumors; target for inhibitors |
| PDGFRB | Receptor tyrosine kinase for PDGF-B/D | Involved in vascular diseases and cancers; biomarker for treatment response |
| PIK3CA | PI3K catalytic subunit | Mediates PDGF-induced AKT signaling; frequently mutated in cancers |
| AKT1 | Serine/threonine kinase | Downstream effector of PDGF; promotes survival and proliferation |
| MAPK1 | ERK2, MAP kinase | Transmits PDGF signals to nucleus; regulates proliferation |
| MAPK3 | ERK1, MAP kinase | Similar to MAPK1; involved in PDGF-induced migration |
| PLCG1 | Phospholipase C gamma 1 | Generates IP3 and DAG; mediates PDGF-induced calcium signaling |
| JAK1 | Janus kinase 1 | Phosphorylates STAT proteins in response to PDGF |
| STAT3 | Signal transducer and activator of transcription 3 | Transcription factor activated by PDGF; promotes proliferation and survival |
| NRP1 | Neuropilin-1 | Mediates lung fibroblast response to rigid collagen fibers via PDGF-α |
| COL1A1 | Collagen type I alpha 1 | PDGF stimulates collagen production in fibroblasts; role in fibrosis |
| MMP2 | Matrix metalloproteinase 2 | PDGF induces MMP2 for matrix remodeling; involved in invasion |
| CCND1 | Cyclin D1 | PDGF upregulates cyclin D1 to drive cell cycle progression |
| MYC | MYC proto-oncogene | PDGF induces MYC expression; promotes proliferation |
How Is response to platelet-derived growth factor Regulated?
The response to PDGF is regulated at multiple levels. Receptor availability is controlled by expression levels and internalization. Negative feedback loops involve phosphatases (e.g., SHP-2) and SOCS proteins that attenuate signaling. Additionally, crosstalk with other signaling pathways (e.g., integrins, GPCRs) modulates the intensity and duration of the response. In disease, mutations or overexpression of PDGF ligands/receptors can override these regulatory mechanisms.
response to platelet-derived growth factor and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PDGFB | Glioblastoma, atherosclerosis | Knockout or overexpression in cell lines; mouse models |
| PDGFRA | Gastrointestinal stromal tumor | Point mutation knock-in (e.g., D842V) in cell lines |
| PDGFRB | Myeloproliferative disorders | Knock-in of fusion genes (e.g., ETV6-PDGFRB) |
| PDGFC | Diabetic nephropathy | Overexpression in mesangial cells under high glucose |
| NRP1 | Lung fibrosis | Knockout in lung fibroblasts; response to rigid collagen |
Cancer
Aberrant PDGF signaling drives tumor growth, angiogenesis, and metastasis in multiple cancers, including glioblastoma, gastrointestinal stromal tumors, and sarcomas. PDGFR/PDGF system components serve as prognostic biomarkers and therapeutic targets.
Fibrosis
PDGF promotes fibroblast proliferation and extracellular matrix deposition, contributing to pulmonary fibrosis, liver cirrhosis, and kidney fibrosis. High glucose induces PDGF-C in mesangial cells, linking PDGF to diabetic nephropathy.
Vascular Diseases
PDGF is involved in atherosclerosis, restenosis after angioplasty, and intracerebral hemorrhage. It stimulates smooth muscle cell migration and proliferation in response to injury.
Bone Disorders
Osteoblasts synthesize and respond to PDGF, affecting bone remodeling; dysregulation may contribute to bone diseases.
From response to platelet-derived growth factor-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of PDGFRA abolish PDGF-induced proliferation? | PDGFRA knockout cell line (e.g., CRISPR-Cas9) |
| Does a specific PDGFRA mutation alter ligand binding? | Point mutation knock-in (e.g., D842V) |
| Can a tagged PDGFRA be used to track receptor trafficking? | Knock-in of fluorescent or epitope tag |
| Does overexpression of PDGFC mimic high-glucose conditions? | PDGFC overexpression in mesangial cells |
| Which genes are essential for PDGF response? | CRISPR library screening (genome-wide) |
| Does PDGF-BB stimulate osteoblast differentiation? | Primary osteoblasts or osteoblast-like cell lines |
How to Study the response to platelet-derived growth factor Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify PDGF-induced transcriptional programs |
| Phosphoproteomics | Phosphorylation status of signaling proteins | Map PDGF receptor signaling networks |
| Live-cell imaging | Cell migration, receptor trafficking | Study PDGF-induced chemotaxis |
| CRISPR knockout screen | Gene essentiality for PDGF response | Discover novel regulators |
| Western blot | Protein expression and phosphorylation | Validate specific pathway activation |
| Proliferation assay | Cell growth rate | Measure PDGF-induced proliferation |
| Migration assay | Cell movement | Assess PDGF-induced chemotaxis |
| Reporter assay | Transcriptional activity | Monitor PDGF-responsive promoters |
Transcriptomics and RNA-seq
RNA sequencing can identify global changes in gene expression following PDGF stimulation, revealing downstream targets and pathways.
Proteomics and Phosphoproteomics
Mass spectrometry-based proteomics can quantify phosphorylation events and protein interactions in the PDGF signaling network.
Imaging and Live-Cell Analysis
Fluorescence microscopy and live-cell imaging can track receptor internalization, cytoskeletal changes, and cell migration in response to PDGF.
CRISPR Screening
Genome-wide CRISPR knockout or activation screens can identify genes that modulate cellular responses to PDGF, uncovering novel regulators.
How CRISPR Can Be Used to Study GO:0036119 response to platelet-derived growth factor
Knockout
CRISPR-Cas9 knockout of PDGF ligands or receptors can abolish the response to PDGF, providing causal evidence for their role. For example, PDGFRA knockout cells fail to proliferate in response to PDGF-AA.
Point Mutation
Introducing specific point mutations (e.g., PDGFRA D842V) via CRISPR can model clinical mutations and study their impact on ligand binding, kinase activity, and downstream signaling.
Knock-in
Knock-in of tags (e.g., GFP, HA) or reporter genes allows real-time tracking of PDGF receptor localization and dynamics. Knock-in of disease-associated mutations can create isogenic models for drug testing.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can elevate PDGF ligand or receptor levels, mimicking pathological overexpression seen in cancers and fibrosis.
How EDITGENE Supports response to platelet-derived growth factor Research
Researchers studying response to platelet-derived growth factor-related genes often need to determine whether a candidate gene is causally involved in PDGF signaling, and to dissect the precise molecular mechanisms. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models for such studies.
Contact EDITGENE today to design your custom CRISPR model for response to platelet-derived growth factor research.
Frequently Asked Questions About response to platelet-derived growth factor
What is GO:0036119?
GO:0036119 is the Gene Ontology term for response to platelet-derived growth factor, describing any cellular or organismal change caused by a PDGF stimulus.
What genes are involved in response to platelet-derived growth factor?
Key genes include PDGFA, PDGFB, PDGFC, PDGFD, PDGFRA, PDGFRB, and downstream effectors like PI3K, AKT, MAPK, and STAT3.
What diseases are associated with PDGF signaling?
PDGF signaling is linked to cancers, fibrosis, atherosclerosis, intracerebral hemorrhage, and diabetic nephropathy.
How can I study PDGF response in the lab?
Common methods include RNA-seq, phosphoproteomics, live-cell imaging, and CRISPR screens.
What are the main PDGF receptors?
The main receptors are PDGFRA and PDGFRB, which are receptor tyrosine kinases.
What is the role of PDGF in fibrosis?
PDGF stimulates fibroblast proliferation and collagen production, contributing to fibrotic diseases like pulmonary fibrosis.
Can CRISPR be used to study PDGF signaling?
Yes, CRISPR knockout, knock-in, and overexpression models are powerful tools to dissect PDGF pathway function.
What is the difference between PDGF-AA and PDGF-BB?
PDGF-AA binds PDGFRA, while PDGF-BB binds both PDGFRA and PDGFRB, leading to different cellular responses.
How is PDGF signaling regulated?
It is regulated by receptor internalization, phosphatases, SOCS proteins, and crosstalk with other pathways.
What cell types respond to PDGF?
Mesenchymal cells such as fibroblasts, smooth muscle cells, osteoblasts, and mesangial cells respond to PDGF.
Conclusion
GO:0036119, response to platelet-derived growth factor, is a central biological process that governs diverse cellular behaviors and is implicated in numerous diseases. Understanding its molecular mechanisms and regulation is essential for developing targeted therapies. CRISPR-based models and high-throughput screening offer powerful approaches to dissect this pathway and identify new therapeutic targets.
References
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- 3. McGowan SE et al.. 2020. Platelet-derived Growth Factor-α and Neuropilin-1 Mediate Lung Fibroblast Response to Rigid Collagen Fibers.. Am J Respir Cell Mol Biol 62(4):454-465 PMID: 31913651
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- 6. Appiah-Kubi K et al.. 2016. Platelet-derived growth factor receptor/platelet-derived growth factor (PDGFR/PDGF) system is a prognostic and treatment response biomarker with multifarious therapeutic targets in cancers.. Tumour Biol 37(8):10053-66 PMID: 27193823
- 7. Zhang L et al.. 1991. Human osteoblasts synthesize and respond to platelet-derived growth factor.. Am J Physiol 261(2 Pt 1):C348-54 PMID: 1831327
- 8. Kitsunai H et al.. 2016. High glucose induces platelet-derived growth factor-C via carbohydrate response element-binding protein in glomerular mesangial cells.. Physiol Rep 4(6) PMID: 27033449
