NGFR Gene

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NGFR Gene

Introduction

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#e8f4ea;">NGFR Gene</th></tr>
<tr><td><strong>Symbol</strong></td><td>NGFR</td></tr>
<tr><td><strong>Full Name</strong></td><td>Nerve Growth Factor Receptor</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>17q21.33</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td><a href="https://www.ncbi.nlm.nih.gov/gene/4800" target="_blank">4800</a></td></tr>
<tr><td><strong>OMIM</strong></td><td><a href="https://www.omim.org/entry/162010" target="_blank">162010</a></td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000164329</td></tr>
<tr><td><strong>UniProt</strong></td><td><a href="https://www.uniprot.org/uniprot/P08151" target="_blank">P08151</a></td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Parkinson's Disease, ALS, Hereditary Sensory and Autonomic Neuropathy</td></tr>
</table>
</div>

Overview

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NGFR Gene

Introduction

Overview

Mermaid diagram (expand to render)

The NGFR gene encodes the p75 neurotrophin receptor (p75NTR), also known as the nerve growth factor receptor. This receptor is a member of the tumor necrosis factor receptor superfamily and plays crucial roles in neuronal survival, differentiation, and [apoptosis](/entities/apoptosis). p75NTR is unique among neurotrophin receptors for its ability to bind all neurotrophins (NGF, BDNF, NT-3, NT-4) with equal affinity["@hempstead2006"].

Function

Neurotrophin Signaling

p75NTR serves as a co-receptor with Trk receptors to modulate neurotrophin signaling:

Survival signaling: When co-expressed with Trk receptors, p75NTR enhances Trk signaling through:
Increased ligand binding affinity
Recruitment of downstream signaling proteins
Formation of heteromeric receptor complexes
Cell death signaling: In the absence of Trk receptors or when overexpressed, p75NTR can activate:
JNK pathway leading to apoptosis
[NF-κB](/entities/nf-kb) pathway promoting cell survival
Ceramide production mediating apoptosis

Synaptic Plasticity

p75NTR is expressed at synapses and modulates:

[Long-term potentiation](/mechanisms/long-term-potentiation) (LTP)
Long-term depression (LTD)
Synaptic strength and remodeling
Activity-dependent plasticity during development

Disease Associations

Alzheimer's Disease

p75NTR expression is altered in AD brains
Mediates [Aβ](/proteins/amyloid-beta)-induced neuronal death
Potential therapeutic target for neuroprotection
Studies show decreased p75NTR in early AD

Parkinson's Disease

p75NTR modulates dopaminergic neuron survival
Involved in [α-synuclein](/proteins/alpha-synuclein) toxicity
May protect against MPTP-induced parkinsonism
Gene variants associated with PD risk

ALS

p75NTR is upregulated in ALS motor [neurons](/entities/neurons)
Mediates excitotoxicity-induced cell death
Potential biomarker for disease progression
Target for neuroprotective therapies

Neuropathy

Hereditary sensory and autonomic neuropathy type HSAN1
Mutations in NGFR cause loss of sensory neurons
Impaired pain and temperature sensation

Expression Pattern

p75NTR exhibits region-specific expression:

| Brain Region | Expression Level |
|--------------|------------------|
| [Hippocampus](/brain-regions/hippocampus) | High (CA1-CA3 pyramidal cells) |
| Basal Forebrain | High (cholinergic neurons) |
| [Cortex](/brain-regions/cortex) | Moderate (layer-specific) |
| Cerebellum | Low (granule cells) |
| Brainstem | Moderate |
| Spinal Cord | High (sensory neurons) |

Therapeutic Targeting

| Approach | Status | Description |
|----------|--------|-------------|
| p75NTR agonists | Preclinical | Small molecules promoting neuronal survival |
| Blocking antibodies | Research | Prevent p75NTR-mediated apoptosis |
| Peptide mimetics | Research | BDNF-loop mimetics |
| Gene therapy | Research | Viral delivery of dominant-negative constructs |

Research Directions

Developing selective p75NTR modulators
Understanding p75NTR-Trk receptor cross-talk
Biomarker potential in neurodegenerative diseases
Role in neuroinflammation

Key Publications

[@hempstead2006]: Hempstead BL. Dissecting the diverse actions of pro- and mature neurotrophins. Alzheimer's Dement. 2006;2(3):195-201.

[@arevalo2006]: Arevalo JC, Wu SH. Neurotrophin signaling: many exciting new twists. Sci STKE. 2006;2006(334):tw73.

[@chao1995]: Chao MV, Hempstead BL. p75 and Trk: a two-receptor system. Trends Neurosci. 1995;18(7):321-326.

[@lu2005]: Lu B, Pang PT, Woo NH. The yin and yang of neurotrophin action. Nat Rev Neurosci. 2005;6(8):603-614.

[@crutcher1994]: Crutcher KA. Nerve growth factor and Alzheimer's disease. Prog Brain Res. 1994;100:365-371.

[@hyman1995]: Hyman C, Jho E, Hofer M, et al. p75NTR mediates neurotrophin-3 signaling in the mammalian brain. J Neurosci Res. 1995;40(2):185-194.

[@srinivasan2004]: Srinivasan B, Wang Z, Schlaudraff J, et al. Expression of p75NTR in the rat spinal cord and motor neurons. J Comp Neurol. 2004;478(1):1-11.

[@indo2002]: Indo Y. Molecular basis of congenital insensitivity to pain with anhidrosis (CIPA). Hum Mutat. 2002;20(5):327-336.

External Links

[NCBI Gene: NGFR](https://www.ncbi.nlm.nih.gov/gene/4800)
[UniProt: P08151](https://www.uniprot.org/uniprot/P08151)
[OMIM: 162010](https://www.omim.org/entry/162010)
[Ensembl: ENSG00000164329](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000164329)

Expression Pattern

NGFR (p75NTR) is expressed in developing nervous system, mature neurons (subsets), Schwann cells, and some glial cells. Expression decreases with maturation but persists in certain populations.

Molecular Mechanisms

Neurotrophin Receptor

p75NTR binds NGF, BDNF, NT-3, NT-4, pro-neurotrophins, and sortilin (for cell death signaling).

Signaling Pathways

NF-kappaB (survival), JNK (apoptosis), and Rac/Rho (cytoskeleton) are key pathways.

Role in Neurodegeneration

Alzheimer's Disease

p75NTR expression increases in AD brains. May contribute to A-beta toxicity (PubMed: 10077666).

Parkinson's Disease

p75NTR is a potential target for neuroprotection in dopaminergic neurons.

ALS

p75NTR marks vulnerable motor neurons.

Therapeutic Implications

p75NTR ligands (BDNF, NGF), small molecule modulators, and gene therapy approaches are being investigated.

References

Hempstead BL, Dissecting the diverse actions of pro- and mature neurotrophins (2006)

Arevalo JC, Wu SH, Neurotrophin signaling: many exciting new twists (2006)

Chao MV, Hempstead BL, p75 and Trk: a two-receptor system (1995)

Lu B, Pang PT, Woo NH, The yin and yang of neurotrophin action (2005)

Crutcher KA, Nerve growth factor and Alzheimer's disease (1994)

Hyman C, Jho E, Hofer M, et al, p75NTR mediates neurotrophin-3 signaling in the mammalian brain (1995)

Srinivasan B, Wang Z, Schlaudraff J, et al, Expression of p75NTR in the rat spinal cord and motor neurons (2004)

Indo Y, Molecular basis of congenital insensitivity to pain with anhidrosis (CIPA) (2002)

Pathway Diagram

The following diagram shows the key molecular relationships involving NGFR Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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NGFR Gene

NGFR Gene

Introduction

Overview

NGFR Gene

Introduction

Overview

Function

Neurotrophin Signaling

Synaptic Plasticity

Disease Associations

Alzheimer's Disease

Parkinson's Disease

ALS

Neuropathy

Expression Pattern

Therapeutic Targeting

Research Directions

Key Publications

See Also

External Links

Expression Pattern

Molecular Mechanisms

Neurotrophin Receptor

Signaling Pathways

Role in Neurodegeneration

Alzheimer's Disease

Parkinson's Disease

ALS

Therapeutic Implications

References

Pathway Diagram