GO:0035790 platelet-derived growth factor receptor-alpha signaling pathway: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0035790 describes the signaling cascade triggered when a ligand binds PDGFR-alpha (PDGFRA) at the cell surface, culminating in regulation of downstream cellular processes such as transcription.
• PDGFR-alpha signaling is essential for cardiac fibroblast survival, and its loss leads to fibroblast apoptosis in the heart.
• In the fetal testis, PDGFR-alpha regulates differentiation through an ERK-CREB axis, highlighting its role in developmental decisions.
• PDGFR-alpha activation drives pulmonary vascular remodeling via progenitor cell proliferation and can induce pulmonary hypertension.
• Cadherin-11 physically interacts with PDGFR-alpha to link cell adhesion with proliferative signaling.
• CRISPR knockout, point-mutation, knock-in and overexpression models are key tools for dissecting PDGFR-alpha pathway function in disease.
Description
The platelet-derived growth factor receptor-alpha signaling pathway (GO:0035790) is a biological process that begins with ligand binding to the alpha-type platelet-derived growth factor receptor (PDGFR-alpha, encoded by PDGFRA) on the surface of a target cell and ends with regulation of a downstream cellular process, such as transcription. This pathway is a central conduit for intercellular communication, translating extracellular growth factor cues into changes in proliferation, survival, migration and differentiation. Because PDGFR-alpha is expressed in mesenchymal lineages including fibroblasts, vascular progenitors and gonadal cells, its signaling is implicated in organ development, tissue remodeling and disease. Researchers study GO:0035790 to understand how normal development and tissue homeostasis are maintained, and how dysregulation contributes to pathologies such as cardiac fibrosis, pulmonary hypertension and testicular differentiation disorders. The pathway is also a paradigm for receptor tyrosine kinase (RTK) biology, linking ligand binding to intracellular phosphorylation cascades, second messenger systems and transcriptional programs. This article synthesizes authoritative QuickGO annotation data with verified PubMed literature to provide a research-grade overview of PDGFR-alpha signaling, its core molecular events, key genes, disease relevance and the CRISPR-based methods used to interrogate it.
platelet-derived growth factor receptor-alpha signaling pathway At A Glance
| GO ID | GO:0035790 |
|---|---|
| GO term | platelet-derived growth factor receptor-alpha signaling pathway |
| Ontology | biological_process |
| Synonym | alphaPDGF receptor signaling pathway; PDGFR-alpha signaling pathway; PDGF receptor-alpha signaling pathway; platelet-derived growth factor receptor-alpha signalling pathway |
| Major function | Transduces extracellular PDGF ligand signals via PDGFR-alpha to regulate downstream cellular processes including transcription, proliferation, survival and differentiation |
| Key receptor | PDGFRA (PDGFR-alpha), an alpha-type receptor tyrosine kinase |
| Downstream axis | ERK-CREB signaling has been shown to mediate PDGFR-alpha effects in fetal testis differentiation |
| Cellular contexts | Cardiac fibroblasts, lung fibroblasts, pulmonary vascular progenitors, gonadal cells |
| Disease relevance | Cardiac fibroblast survival, pulmonary hypertension, myofascial trigger points, diabetic cardiomyopathy |
What Is GO:0035790?
GO:0035790, platelet-derived growth factor receptor-alpha signaling pathway, is defined as the series of molecular signals initiated by ligand binding to an alpha-type platelet-derived growth factor receptor (PDGFalpha) on the surface of a target cell, and ending with the regulation of a downstream cellular process, for example transcription. In practice, this encompasses ligand-induced receptor dimerization and autophosphorylation, recruitment of adaptor and effector proteins, activation of kinase cascades such as ERK, and eventual changes in gene expression or cell behavior.
Why Is platelet-derived growth factor receptor-alpha signaling pathway Important in Cell Biology?
PDGFR-alpha signaling is important because it governs fundamental cell fate decisions such as survival, proliferation and differentiation, and its dysregulation is linked to multiple human diseases. In the heart, PDGFR-alpha is essential for cardiac fibroblast survival, and its loss promotes fibroblast apoptosis, which can impair cardiac tissue integrity. In the lung, PDGFR-alpha activation drives pulmonary vascular remodeling via progenitor cell proliferation and can induce pulmonary hypertension. In development, PDGFR-alpha regulates fetal testis differentiation through an ERK-CREB axis, underscoring its role in organogenesis. These diverse functions make GO:0035790 a high-value target for both basic developmental biology and translational research.
• Essential for cardiac fibroblast survival; loss of PDGFR-alpha leads to fibroblast apoptosis.
• Drives pulmonary vascular remodeling and can induce pulmonary hypertension via progenitor cell proliferation.
• Regulates fetal testis differentiation through an ERK-CREB axis.
• Links cell adhesion to proliferation through interaction with cadherin-11.
• Contributes to mechano-responsiveness of lung fibroblasts together with Rac1.
• Implicated in myofascial trigger points and inflammatory pain-like behavior in animal models.
• Intersects with Hedgehog signaling during postnatal lung development.
• Cardiac fibroblast-derived CCN1 aggravates diabetic cardiomyopathy through integrin-mediated autophagy inhibition, highlighting crosstalk with PDGFR-alpha-related fibrotic signaling.
• Provides a model RTK pathway for studying ligand-receptor specificity and downstream transcriptional control.
• Offers therapeutic targets for fibrotic, vascular and developmental disorders.
What Happens During platelet-derived growth factor receptor-alpha signaling pathway?
Ligand binding and receptor activation
In simple terms: A growth factor docks onto the receptor on the cell surface, switching the receptor on.
The pathway is initiated when a platelet-derived growth factor ligand binds to PDGFR-alpha on the surface of a target cell. This binding induces receptor dimerization and autophosphorylation of intracellular tyrosine residues, creating docking sites for downstream signaling proteins. In cardiac fibroblasts, PDGFR-alpha activity is required for survival, and its loss triggers apoptosis, indicating that ligand-dependent activation is a key survival input. In fetal testis, PDGFR-alpha activation is necessary for differentiation, and the signal is transduced through an ERK-CREB axis.
Intracellular signal transduction
In simple terms: The activated receptor passes the message to a chain of proteins inside the cell.
Following autophosphorylation, PDGFR-alpha recruits adaptor proteins and activates kinase cascades, notably the ERK pathway. In fetal testis differentiation, PDGFR-alpha signals via ERK to CREB, linking receptor activation to transcriptional regulation. Cadherin-11 interacts with PDGFR-alpha signaling to connect cell adhesion with proliferation, suggesting that adhesion complexes modulate the transduction step. In lung fibroblasts, PDGFR-alpha and Rac1 together regulate mechano-responsiveness, indicating that cytoskeletal and small GTPase signaling intersect with the pathway.
Downstream cellular responses
In simple terms: The signal changes what the cell does, such as divide, survive or specialize.
The pathway ends with regulation of downstream cellular processes such as transcription, proliferation, survival and differentiation. In pulmonary vascular remodeling, PDGFR-alpha activation drives progenitor cell proliferation and can induce pulmonary hypertension. In myofascial trigger points, PDGFR-alpha induces contraction knots and inflammatory pain-like behavior in a rat model. These examples illustrate how a single receptor pathway can produce context-dependent outcomes ranging from survival to pathological remodeling.
Crosstalk with other signaling pathways
In simple terms: The PDGF-alpha signal does not act alone; it talks to other pathways.
PDGFR-alpha signaling intersects with Hedgehog signaling during postnatal lung development, indicating that developmental programs integrate multiple inputs. In diabetic cardiomyopathy, cardiac fibroblast-derived CCN1 aggravates disease through ITGAV-ITGB1/integrin αvβ1-mediated autophagy inhibition, revealing crosstalk between fibrotic signaling and autophagy. These interactions expand the regulatory landscape of GO:0035790 beyond a simple linear cascade.
Key Genes Involved in GO:0035790 platelet-derived growth factor receptor-alpha signaling pathway
The following genes and proteins are central to the platelet-derived growth factor receptor-alpha signaling pathway, based on verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PDGFRA | Alpha-type receptor tyrosine kinase that initiates the pathway upon ligand binding | Core receptor; knockout and point-mutation models reveal survival and differentiation roles |
| PDGFB | Ligand that binds and activates PDGFR-alpha | Ligand-side manipulation to study pathway activation |
| PDGFA | Ligand that binds and activates PDGFR-alpha | Ligand-side manipulation to study pathway activation |
| ERK1/2 (MAPK3/MAPK1) | Downstream kinases activated by PDGFR-alpha | Mediates ERK-CREB axis in fetal testis differentiation |
| CREB1 | Transcription factor phosphorylated downstream of ERK | Links PDGFR-alpha signaling to transcriptional programs |
| CDH11 | Cadherin-11, adhesion molecule that interacts with PDGFR-alpha signaling | Connects cell adhesion to proliferation |
| RAC1 | Small GTPase regulating mechano-responsiveness with PDGFR-alpha | Modulates lung fibroblast mechanotransduction |
| CCN1 (CYR61) | Matricellular protein secreted by cardiac fibroblasts | Aggravates diabetic cardiomyopathy via integrin-mediated autophagy inhibition |
| ITGAV | Integrin alpha-V subunit | Part of integrin αvβ1 complex in CCN1 signaling |
| ITGB1 | Integrin beta-1 subunit | Part of integrin αvβ1 complex in CCN1 signaling |
| SHH | Sonic Hedgehog ligand | Intersects with PDGFR-alpha during postnatal lung development |
| GLI1 | Hedgehog pathway transcription factor | Potential crosstalk node with PDGFR-alpha |
| ACTA2 | Smooth muscle actin, marker of myofibroblast contraction | Readout of contraction knots in myofascial trigger points |
| COL1A1 | Type I collagen, fibrosis marker | Downstream of fibrotic PDGFR-alpha signaling |
| VEGFA | Angiogenic factor | Potential downstream of vascular remodeling |
| PECAM1 | Endothelial marker | Used to assess vascular remodeling |
| PCNA | Proliferation marker | Readout of progenitor cell proliferation in pulmonary hypertension |
| CASP3 | Apoptosis effector | Readout of cardiac fibroblast apoptosis upon PDGFR-alpha loss |
How Is platelet-derived growth factor receptor-alpha signaling pathway Regulated?
PDGFR-alpha signaling is regulated at multiple levels. Receptor availability and ligand affinity determine the strength and duration of the signal. Downstream, the ERK-CREB axis integrates PDGFR-alpha input into transcriptional responses, and its modulation can alter differentiation outcomes. Cadherin-11 interaction with PDGFR-alpha provides an adhesion-dependent layer of regulation, linking cell-cell contacts to proliferative signaling. In lung fibroblasts, Rac1 regulates mechano-responsiveness together with PDGFR-alpha, indicating that mechanical cues and small GTPase activity modulate the pathway. Additionally, crosstalk with Hedgehog signaling during lung development suggests that developmental morphogens can tune PDGFR-alpha activity. In diabetic cardiomyopathy, CCN1-integrin signaling impairs autophagy, illustrating how the extracellular matrix can influence fibrotic signaling associated with PDGFR-alpha.
platelet-derived growth factor receptor-alpha signaling pathway and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PDGFRA | Cardiac fibroblast survival and fibrosis | Cardiac fibroblast-specific knockout mouse |
| PDGFRA | Pulmonary hypertension and vascular remodeling | Progenitor cell-specific knockout or overexpression in lung |
| PDGFRA | Fetal testis differentiation | Conditional knockout in gonadal tissue |
| CDH11 | Cell adhesion and proliferation | Cadherin-11 knockout or knockdown in fibroblasts |
| CCN1 | Diabetic cardiomyopathy | Cardiac fibroblast-specific overexpression or knockout |
Cardiac fibrosis and fibroblast survival
PDGFR-alpha is essential for cardiac fibroblast survival; its loss leads to fibroblast apoptosis, which can compromise cardiac tissue homeostasis and contribute to adverse remodeling. Cardiac fibroblast-derived CCN1 aggravates diabetic cardiomyopathy through ITGAV-ITGB1/integrin αvβ1-mediated autophagy inhibition, highlighting how fibrotic signaling intersects with metabolic heart disease. These findings position PDGFR-alpha as a potential target for modulating cardiac fibrosis.
Pulmonary hypertension and vascular remodeling
PDGFR-alpha activation drives pulmonary vascular remodeling via progenitor cell proliferation and can induce pulmonary hypertension. In lung fibroblasts, PDGFR-alpha and Rac1 regulate mechano-responsiveness, which may contribute to pathological remodeling. Hedgehog and PDGF signaling intersect during postnatal lung development, suggesting that developmental pathway crosstalk may be reactivated in disease.
Myofascial trigger points and pain
In a rat model of myofascial trigger points, PDGFR-alpha induces contraction knots and inflammatory pain-like behavior, linking the pathway to musculoskeletal pain syndromes. This suggests that PDGFR-alpha signaling may be a therapeutic target for myofascial pain.
Fetal testis differentiation and developmental disorders
PDGFR-alpha regulates fetal testis differentiation via an ERK-CREB axis, indicating a critical role in gonadal development. Disruption of this pathway could contribute to disorders of sex development, making it a subject of developmental biology research.
From platelet-derived growth factor receptor-alpha signaling pathway-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is PDGFR-alpha required for cardiac fibroblast survival? | Cardiac fibroblast-specific PDGFRA knockout mouse |
| Does PDGFR-alpha drive pulmonary vascular remodeling? | Progenitor cell-specific PDGFRA overexpression or knockout in lung |
| How does PDGFR-alpha regulate fetal testis differentiation? | Conditional PDGFRA knockout in gonadal tissue |
| Does cadherin-11 interaction modulate PDGFR-alpha signaling? | CDH11 knockout or point-mutation in fibroblasts |
| What is the role of Rac1 in PDGFR-alpha mechano-responsiveness? | RAC1 knockout or point-mutation in lung fibroblasts |
| Can PDGFR-alpha inhibition reduce myofascial pain? | Pharmacological or genetic PDGFRA knockdown in rat model |
How to Study the platelet-derived growth factor receptor-alpha signaling pathway Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Loss-of-function of PDGFRA or effectors | Testing requirement in survival and differentiation |
| Phospho-immunoblotting | Receptor and ERK phosphorylation | Confirming pathway activation |
| RNA-seq | Transcriptional changes | Identifying downstream programs |
| Immunofluorescence | Protein localization and proliferation markers | Assessing vascular remodeling and contraction knots |
| Hemodynamic measurements | Pulmonary artery pressure | Evaluating pulmonary hypertension |
| Apoptosis assays | Caspase activity or TUNEL | Measuring cardiac fibroblast survival |
| Mass spectrometry | Protein interactions and post-translational modifications | Mapping signaling complexes |
| Conditional knockout | Tissue-specific gene deletion | Studying organ-specific roles |
Genetic knockout and knockdown
CRISPR-Cas9 knockout of PDGFRA or its downstream effectors is used to test requirement in processes such as cardiac fibroblast survival and fetal testis differentiation. Conditional knockout models allow tissue-specific analysis, as demonstrated in cardiac fibroblasts and gonadal tissues.
Phospho-proteomics and signaling assays
Phosphorylation of PDGFR-alpha and downstream ERK can be measured by immunoblotting or mass spectrometry to assess pathway activation. These methods are used to confirm ligand-induced activation and to map signaling nodes such as CREB.
Transcriptomics and imaging
RNA-seq can identify transcriptional programs downstream of PDGFR-alpha, while imaging of contraction knots and inflammatory markers is used in myofascial trigger point models. Immunofluorescence for proliferation markers such as PCNA assesses vascular remodeling.
Functional assays in disease models
Pulmonary hypertension models use hemodynamic measurements and histology to assess vascular remodeling upon PDGFR-alpha modulation. Cardiac fibrosis models evaluate fibroblast apoptosis and collagen deposition.
How CRISPR Can Be Used to Study GO:0035790 platelet-derived growth factor receptor-alpha signaling pathway
Knockout
CRISPR knockout of PDGFRA is used to demonstrate its essential role in cardiac fibroblast survival, where loss leads to apoptosis. Knockout of downstream effectors such as ERK or CREB can dissect the ERK-CREB axis in fetal testis differentiation. Knockout of interacting proteins like cadherin-11 can reveal adhesion-dependent modulation of PDGFR-alpha signaling.
Point Mutation
Point mutations in PDGFRA can be introduced to mimic kinase-dead or constitutively active states, allowing precise structure-function analysis of the receptor. Such models are valuable for testing specific phosphorylation sites implicated in downstream signaling.
Knock-in
Knock-in of tagged PDGFRA (e.g., GFP or HA) enables live-cell imaging and proteomic isolation of receptor complexes. Knock-in of reporter genes under PDGFR-alpha-responsive promoters can monitor pathway activity in real time.
Overexpression
Overexpression of PDGFRA or its ligands can drive pathological phenotypes such as pulmonary vascular remodeling and pulmonary hypertension. Overexpression of CCN1 in cardiac fibroblasts aggravates diabetic cardiomyopathy, illustrating how gain-of-function models reveal disease mechanisms.
How EDITGENE Supports platelet-derived growth factor receptor-alpha signaling pathway Research
Researchers studying platelet-derived growth factor receptor-alpha signaling pathway-related genes often need to determine whether a candidate gene is causally involved in pathway activation, downstream transcription, or disease phenotypes. EDITGENE provides a comprehensive suite of CRISPR-based cell model services to accelerate this discovery process.
Contact EDITGENE today to design your custom CRISPR model for platelet-derived growth factor receptor-alpha signaling pathway research.
Frequently Asked Questions About platelet-derived growth factor receptor-alpha signaling pathway
What is GO:0035790?
GO:0035790 is the Gene Ontology term for platelet-derived growth factor receptor-alpha signaling pathway, defined as the series of molecular signals initiated by ligand binding to PDGFR-alpha and ending with regulation of a downstream cellular process such as transcription.
What genes are involved in platelet-derived growth factor receptor-alpha signaling pathway?
Key genes include PDGFRA (the receptor), PDGF ligands, downstream kinases ERK1/2, transcription factor CREB1, adhesion molecule CDH11, small GTPase RAC1, and matricellular protein CCN1.
What happens when PDGFR-alpha is activated?
Ligand binding induces receptor dimerization and autophosphorylation, activating downstream cascades such as ERK, which can lead to changes in transcription, proliferation, survival or differentiation.
Is PDGFR-alpha important for heart function?
Yes, PDGFR-alpha is essential for cardiac fibroblast survival; its loss leads to fibroblast apoptosis, which can impair cardiac tissue homeostasis.
How is PDGFR-alpha signaling linked to pulmonary hypertension?
PDGFR-alpha activation drives pulmonary vascular remodeling via progenitor cell proliferation and can induce pulmonary hypertension in experimental models.
What is the role of PDGFR-alpha in fetal testis differentiation?
PDGFR-alpha regulates fetal testis differentiation through an ERK-CREB axis, highlighting its importance in gonadal development.
How does cadherin-11 interact with PDGFR-alpha signaling?
Cadherin-11 interacts with PDGFR-alpha signaling to link cell adhesion with proliferation, providing an adhesion-dependent layer of regulation.
Can PDGFR-alpha signaling be studied with CRISPR?
Yes, CRISPR knockout, point mutation, knock-in and overexpression models are widely used to dissect PDGFR-alpha pathway function in cardiac, pulmonary and gonadal cells.
What diseases are associated with PDGFR-alpha signaling?
Associated conditions include cardiac fibrosis, pulmonary hypertension, myofascial trigger points, diabetic cardiomyopathy and disorders of testis differentiation.
What methods are used to study PDGFR-alpha signaling?
Common methods include CRISPR knockout, phospho-immunoblotting, RNA-seq, immunofluorescence, hemodynamic measurements and apoptosis assays.
Conclusion
GO:0035790, platelet-derived growth factor receptor-alpha signaling pathway, is a fundamental biological process that translates extracellular PDGF signals into diverse cellular outcomes including survival, proliferation and differentiation. Its dysregulation is implicated in cardiac, pulmonary and developmental disorders, making it a high-priority target for basic and translational research. CRISPR-based models, combined with multi-omics and imaging approaches, provide powerful tools to dissect this pathway and identify therapeutic opportunities.
References
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- 2. Liu Y et al.. 2024. Platelet-derived Growth Factor Receptor-α Induces Contraction Knots and Inflammatory Pain-like Behavior in a Rat Model of Myofascial Trigger Points.. Anesthesiology 141(5):929-945 PMID: 39058323
- 3. Li SY et al.. 2026. Platelet-derived growth factor receptor alpha regulates fetal testis differentiation via an ERK-CREB axis.. Proc Natl Acad Sci U S A 123(4):e2515138123 PMID: 41564132
- 4. Yie TA et al.. 2023. Hedgehog and Platelet-derived Growth Factor Signaling Intersect during Postnatal Lung Development.. Am J Respir Cell Mol Biol 68(5):523-536 PMID: 36693140
- 5. Madarampalli B et al.. 2019. Interactions between cadherin-11 and platelet-derived growth factor receptor-alpha signaling link cell adhesion and proliferation.. Biochim Biophys Acta Mol Basis Dis 1865(6):1516-1524 PMID: 30876808
- 6. Hu BA et al.. 2026. Cardiac fibroblast-derived CCN1 aggravates diabetic cardiomyopathy through ITGAV-ITGB1/integrin αvβ1-mediated autophagy inhibition.. Autophagy 22(8):1945-1968 PMID: 42056922
- 7. Solinc J et al.. 2022. Platelet-Derived Growth Factor Receptor Type α Activation Drives Pulmonary Vascular Remodeling Via Progenitor Cell Proliferation and Induces Pulmonary Hypertension.. J Am Heart Assoc 11(7):e023021 PMID: 35348002
- 8. McGowan SE et al.. 2017. Platelet-derived growth factor receptor-α and Ras-related C3 botulinum toxin substrate-1 regulate mechano-responsiveness of lung fibroblasts.. Am J Physiol Lung Cell Mol Physiol 313(6):L1174-L1187 PMID: 28775097
