PDGFRB — Platelet Derived Growth Factor Receptor Beta

PDGFRB — Platelet Derived Growth Factor Receptor Beta

Overview

Pdgfrb — Platelet Derived Growth Factor Receptor Beta plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Pdgfrb — Platelet Derived Growth Factor Receptor Beta is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ishii2018]

<div class="infobox infobox-gene"> [@gao2020]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Platelet Derived Growth Factor Receptor Beta</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>PDGFRB</td></tr>
<tr><td><strong>Full Name</strong></td><td>Platelet Derived Growth Factor Receptor Beta</td></tr>
<tr><td><strong>Chromosome</strong></td><td>5q32</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[5156](https://www.ncbi.nlm.nih.gov/gene/5156)</td></tr>
<tr><td><strong>OMIM</strong></td><td>173410</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000113721</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P09619](https://www.uniprot.org/uniprot/P09619)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Parkinson's Disease, Childhood Brain Tumors, Myeloproliferative Disorders</td></tr>
</table>
</div>

Function

...

PDGFRB — Platelet Derived Growth Factor Receptor Beta

Overview

Pdgfrb — Platelet Derived Growth Factor Receptor Beta plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Pdgfrb — Platelet Derived Growth Factor Receptor Beta is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ishii2018]

<div class="infobox infobox-gene"> [@gao2020]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Platelet Derived Growth Factor Receptor Beta</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>PDGFRB</td></tr>
<tr><td><strong>Full Name</strong></td><td>Platelet Derived Growth Factor Receptor Beta</td></tr>
<tr><td><strong>Chromosome</strong></td><td>5q32</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[5156](https://www.ncbi.nlm.nih.gov/gene/5156)</td></tr>
<tr><td><strong>OMIM</strong></td><td>173410</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000113721</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P09619](https://www.uniprot.org/uniprot/P09619)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Parkinson's Disease, Childhood Brain Tumors, Myeloproliferative Disorders</td></tr>
</table>
</div>

Function

PDGFRB encodes the beta chain of the platelet-derived growth factor receptor, a receptor tyrosine kinase that binds PDGF-BB and PDGF-AB. Upon ligand binding, PDGFRB dimerizes and autophosphorylates, activating downstream signaling pathways including PI3K/AKT, RAS/MAPK, and PLCG. In the nervous system, PDGFRB is expressed primarily on [pericytes](/entities/pericytes), vascular smooth muscle cells, and some neural progenitors. It plays critical roles in [blood-brain barrier](/entities/blood-brain-barrier) maintenance, cerebral vascular development, and pericyte-neuron signaling. PDGFRB signaling supports neuronal survival and has been implicated in Parkinson's disease and other neurodegenerative conditions.

Expression

PDGFRB is expressed in:

• Pericytes (brain microvasculature)
• Vascular smooth muscle cells
• Some neural progenitors
• Fibroblasts

High expression on brain pericytes, critical for blood-brain barrier function.

Disease Associations

| Disease | Role | Mechanism |
|---------|------|-----------|
| Alzheimer's Disease | Risk/Progression | Various mechanisms depending on gene function |
| Parkinson's Disease | Risk/Progression | Various mechanisms depending on gene function |
| Amyotrophic Lateral Sclerosis | Risk/Progression | Various mechanisms depending on gene function |

Therapeutic Implications

Targeting PDGFRB has therapeutic potential in neurodegenerative diseases through:

• Gene therapy approaches for loss-of-function variants
• Small molecule modulators of protein function
• Protein supplementation strategies

Key Publications

Heldin CH, et al. (2004). "PDGFR signaling." Int J Biochem Cell Biol. PMID: 15172129(https://pubmed.ncbi.nlm.nih.gov/15172129/)

Winkler EA, et al. (2014). "PDGFRB and blood-brain barrier." Nat Neurosci. PMID: 24316890(https://pubmed.ncbi.nlm.nih.gov/24316890/)

Ishii Y, et al. (2018). "PDGFRB in neurodegeneration." J Neurosci Res. PMID: 29521431(https://pubmed.ncbi.nlm.nih.gov/29521431/)

Gao L, et al. (2020). "Pericyte PDGFRB in AD." Acta Neuropathol. PMID: 32086621(https://pubmed.ncbi.nlm.nih.gov/32086621/)

See Also

• [Autophagy](/mechanisms/autophagy)
• [Axonal Transport](/mechanisms/axonal-transport)
• [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)

Overview

Pdgfrb — Platelet Derived Growth Factor Receptor Beta plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Pdgfrb — Platelet Derived Growth Factor Receptor Beta has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

[Winkler EA, et al, (2014) (2014)](https://pubmed.ncbi.nlm.nih.gov/24316890/)

[Ishii Y, et al, (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/29521431/)

[Gao L, et al, (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32086621/)

PDGFR Signaling Mechanism

Receptor Activation

PDGFRB is a receptor tyrosine kinase that mediates signaling through a well-characterized cascade[@winkler2014]:

Upon ligand binding, PDGFRB dimerizes and undergoes autophosphorylation, creating docking sites for downstream signaling proteins.

Signaling Pathways

| Pathway | Key Effectors | Cellular Outcomes |
|---------|--------------|-------------------|
| PI3K/AKT | AKT, mTOR | Survival, metabolism |
| RAS/MAPK | RAF, MEK, ERK | Proliferation, differentiation |
| PLCγ | PKC, calcium | Cytoskeleton, gene expression |

Blood-Brain Barrier Function

Pericyte-Neuron Interactions

PDGFRB-expressing pericytes are essential for blood-brain barrier (BBB) maintenance[@winkler2014]:

• Barrier formation: Pericytes induce endothelial tight junction formation
• Transport regulation: Control passage of molecules and cells
• Angiogenesis: Guide vessel growth and stabilization
• Neuronal support: Mediate neurovascular coupling

BBB Dysfunction in Neurodegeneration

BBB breakdown is an early feature in neurodegenerative diseases[@winkler2014][@gao2020]:

| Feature | AD | PD |
|---------|----|----|
| Pericyte loss | ++ | + |
| Tight junction disruption | ++ | + |
| Vascular leakage | + | + |
| Reduced coverage | +++ | ++ |

Pericyte degeneration precedes neuronal loss in many cases, suggesting a causal role in disease progression.

Pericyte Biology in the Brain

Pericyte Functions

Brain pericytes perform multiple essential functions:

Vascular stability: Maintain vessel wall integrity

Capillary perfusion: Regulate blood flow through contraction

BBB maintenance: Support endothelial barrier function

Immune surveillance: Control leukocyte trafficking

Stem cell niche: Support neural stem cell populations

Pericyte Death Mechanisms

Pericytes are vulnerable to multiple insults[@gao2020]:

• Amyloid toxicity: Aβ accumulation damages pericytes
• Oxidative stress: High metabolic demand increases ROS sensitivity
• Mitochondrial dysfunction: Energy failure leads to cell death
• Inflammation: Pro-inflammatory cytokines promote pericyte loss

Disease Mechanisms

Alzheimer's Disease

PDGFRB signaling impairment contributes to AD through[@gao2020]:

Amyloid accumulation: Impaired clearance across the BBB

Vascular dysfunction: Reduced cerebral blood flow

Pericyte degeneration: Loss of BBB integrity

Neuroinflammation: Enhanced leukocyte entry

Parkinson's Disease

In PD, PDGFRB on pericytes affects[@ishii2018]:

• Blood-brain barrier permeability: Increased leakiness
• Dopaminergic neuron support: Impaired neurovascular coupling
• α-Synuclein clearance: Reduced perivascular drainage
• Neuroinflammation: Enhanced inflammatory responses

Amyotrophic Lateral Sclerosis

Pericyte dysfunction in ALS:

• Motor neuron vascular support: Impaired blood flow to motor regions
• BBB breakdown: Enhanced toxin entry
• Inflammation: Increased immune cell infiltration

Therapeutic Strategies

Targeting PDGFRB

| Approach | Mechanism | Status |
|----------|-----------|--------|
| PDGFR agonists | Enhance pericyte function | Research |
| Pericyte transplantation | Cell replacement | Preclinical |
| Small molecule enhancers | Boost PDGFRB signaling | Discovery |
| Gene therapy | Restore PDGFRB expression | Preclinical |

BBB Protection

Strategies to protect pericytes include:

• Antioxidants: Reduce oxidative stress
• Anti-inflammatory agents: Decrease cytokine-mediated damage
• Amyloid clearance: Reduce pericyte amyloid toxicity
• Growth factors: Support pericyte survival

See Also

Related Hypotheses

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

• [Retinal Vascular Microcirculation Rescue](/hypothesis/h-35f04e1b) — <span style="color:#ffd54f;font-weight:600">0.54</span> · Target: PDGFRB/ANGPT1
• [Pericyte Contractility Reset via Selective PDGFR-β Agonism](/hypothesis/h-73e4340b) — <span style="color:#ffd54f;font-weight:600">0.43</span> · Target: PDGFRB

Pathway Diagram

The following diagram shows the key molecular relationships involving PDGFRB — Platelet Derived Growth Factor Receptor Beta discovered through SciDEX knowledge graph analysis: