GFRAL Gene - GDNF Receptor Alpha Like

GFRAL — GDNF Receptor Alpha Like

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GFRAL Gene - GDNF Receptor Alpha Like</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>GFRAL</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>GDNF Receptor Alpha Like</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>6p12.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>390538</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>615866</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000173137</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q6UXB5</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/autoimmune" style="color:#ef9a9a">Autoimmune</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/inflammation" style="color:#ef9a9a">Inflammation</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">49 edges</a></td>
</tr>
</table>

Introduction

GFRAL (GDNF Receptor Alpha Like) encodes the receptor for Glial Cell Line-Derived Neurotrophic Factor (GDNF) family ligands. Located on chromosome 6p12.1, GFRAL is the founding member of the GDNF receptor family and serves as the exclusive high-affinity receptor for GDNF and related ligands. [@gfral]

GFRAL — GDNF Receptor Alpha Like

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GFRAL Gene - GDNF Receptor Alpha Like</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>GFRAL</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>GDNF Receptor Alpha Like</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>6p12.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>390538</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>615866</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000173137</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q6UXB5</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/autoimmune" style="color:#ef9a9a">Autoimmune</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/inflammation" style="color:#ef9a9a">Inflammation</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">49 edges</a></td>
</tr>
</table>

Introduction

GFRAL (GDNF Receptor Alpha Like) encodes the receptor for Glial Cell Line-Derived Neurotrophic Factor (GDNF) family ligands. Located on chromosome 6p12.1, GFRAL is the founding member of the GDNF receptor family and serves as the exclusive high-affinity receptor for GDNF and related ligands. [@gfral]

GFRAL is a critical therapeutic target for neurodegenerative diseases, particularly [Parkinson's disease](/diseases/parkinsons-disease), as it mediates the neuroprotective effects of GDNF on dopaminergic [neurons](/entities/neurons).[@gfral] [@gfrala]

The protein encoded by GFRAL is [GFRAL Protein](/proteins/gfral-protein).[@gfrala] [@gdnf]

--- [@gfral2018]

Overview

GFRAL is a cell surface receptor that belongs to the GDNF receptor family (GFRalpha). Unlike other GFRalpha family members (GFRalpha1-4) which can bind multiple ligands, GFRAL shows high specificity for GDNF. It functions as a co-receptor, requiring association with the RET tyrosine kinase to transduce signals into the cell. [@ret]

The discovery of GFRAL as the GDNF receptor resolved decades of research into GDNF signaling mechanisms and opened new therapeutic avenues for neurodegenerative disease treatment.

Gene Structure

Protein Structure and Function

Domain Architecture

GFRAL contains several structural features:

• N-terminal signal peptide: Targets protein to the secretory pathway
• extracellular domain: Ligand binding
• Glycosylphosphatidylinositol (GPI) anchor: Membrane attachment
• C-terminal hydrophobic region: Membrane-spanning segment

Receptor Complex

GFRAL functions as part of a heteromeric receptor complex:

Signal Transduction

Upon ligand binding:

• PI3K/Akt: Cell survival
• RAS/ERK: Neurite outgrowth
• PLCγ: Calcium signaling

Expression Pattern

Brain Expression

GFRAL is expressed in specific neuronal populations:

• Substantia nigra pars compacta: Dopaminergic neurons
• Ventral tegmental area: Mesolimbic dopamine neurons
• Striatum: Medium spiny neurons
• Motor neurons: Spinal cord

Peripheral Expression

• Enteric nervous system: Gut neurons
• Pancreas: Some endocrine cells
• Testis: Spermatogonia

Biological Functions

Neuronal Survival

GFRAL-mediated signaling promotes:

• Dopaminergic neuron survival: Critical for Parkinson's therapy
• Motor neuron maintenance: Relevant to ALS
• Neurite outgrowth: Promotes axonal regeneration
• Synapse formation: Supports synaptic connectivity

Neuroplasticity

GDNF/GFRAL signaling affects:

• Dendritic arborization
• Synaptic plasticity
• [Long-term potentiation](/mechanisms/long-term-potentiation)

Regeneration

The GFRAL pathway supports:

• Axonal regeneration after injury
• Neuronal repair
• Functional recovery

Disease Associations

Parkinson's Disease

GFRAL is a major therapeutic target in PD:

• Neuroprotection: GDNF preserves dopaminergic neurons
• Neurorestoration: Promotes function of surviving neurons
• Clinical trials: Multiple GDNF/GDNF mimetic trials

Amyotrophic Lateral Sclerosis (ALS)

• GFRAL expressed in motor neurons
• GDNF delivery trials in ALS
• Potential for motor neuron protection

Spinal Cord Injury

• GFRAL signaling promotes regeneration
• Potential for functional recovery
• Combined with rehabilitation

Stroke

• Neuroprotective effects
• Supports post-stroke recovery
• Angiogenesis promotion

Therapeutic Approaches

GDNF Delivery

Multiple delivery strategies:

• Protein infusion: Direct GDNF delivery to brain
• Gene therapy: AAV-mediated GFRAL/RET expression
• Cell therapy: GDNF-producing cell transplants
• Small molecules: GFRAL agonists

GFRAL-Targeting Drugs

• Monoclonal antibodies: Agonist antibodies
• Small molecule agonists: Non-peptide GFRAL activators
• Peptide mimetics: GDNF mimetics

Clinical Trials

Multiple clinical programs:

• Intraputaminal GDNF infusion: Shows promise in PD
• AAV2-GDNF: Gene therapy approaches
• Stem cell-derived neurons: Cell replacement therapy

Pathogenic Mechanisms

GFRAL Dysfunction

Reduced GFRAL signaling contributes to:

• Progressive dopaminergic neuron loss
• Impaired neuronal resilience
• Accelerated disease progression

Neuroinflammation

GDNF/GFRAL has anti-inflammatory effects:

• Reduces microglial activation
• Modulates cytokine production
• Protects against neuroinflammation

Protein Homeostasis

GFRAL signaling affects:

• [Autophagy](/entities/autophagy) regulation
• Protein aggregate clearance
• ER stress responses

Research Models

Cellular Models

• Primary dopaminergic neuron cultures
• iPSC-derived neurons
• Motor neuron models

Animal Models

• Gfral knockout mice
• Gdnf knockout mice
• Parkinson's disease models
• GFRAL humanized mice

Biomarkers and Diagnostics

Potential Biomarkers

• GFRAL expression levels
• Soluble GFRAL in CSF
• RET phosphorylation status

Patient Selection

• GFRAL expression as predictor
• RET status for treatment response
• Genetic variants affecting response

See Also

• [GFRAL Protein](/proteins/gfral-protein)
• [GDNF](/entities/gdnf)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Dopaminergic Neurons](/cell-types/dopaminergic-neurons)
• [Neurotrophic Factors](/mechanisms/neurotrophic-factors)
• [Substantia Nigra](/brain-regions/substantia-nigra)

External Links

• [NCBI Gene: GFRAL](https://www.ncbi.nlm.nih.gov/gene/390538)
• [UniProt: GFRAL](https://www.uniprot.org/uniprot/Q6UXB5)
• [OMIM: GFRAL](https://omim.org/entry/615866)
• [GDNF Foundation](https://www.gdnf.co.uk/)

Background

The study of Gfral Gene Gdnf Receptor Alpha Like 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.

References

Pathway Diagram

The following diagram shows the key molecular relationships involving GFRAL Gene - GDNF Receptor Alpha Like discovered through SciDEX knowledge graph analysis: