Ngfr Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| NGFR Gene | |
|---|---|
| Symbol | NGFR |
| Full Name | Nerve Growth Factor Receptor |
| Chromosomal Location | 17q21.33 |
| NCBI Gene ID | 4800 |
| OMIM | 162010 |
| Ensembl ID | ENSG00000164329 |
| UniProt | P08151 |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, ALS, Hereditary Sensory and Autonomic Neuropathy |
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. p75NTR is unique among neurotrophin receptors for its ability to bind all neurotrophins (NGF, BDNF, NT-3, NT-4) with equal affinity[1].
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:
Cell death signaling: In the absence of Trk receptors or when overexpressed, p75NTR can activate:
p75NTR is expressed at synapses and modulates:
p75NTR exhibits region-specific expression:
| Brain Region | Expression Level |
|---|---|
| Hippocampus | High (CA1-CA3 pyramidal cells) |
| Basal Forebrain | High (cholinergic neurons) |
| Cortex | Moderate (layer-specific) |
| Cerebellum | Low (granule cells) |
| Brainstem | Moderate |
| Spinal Cord | High (sensory neurons) |
| 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 |
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.
p75NTR binds NGF, BDNF, NT-3, NT-4, pro-neurotrophins, and sortilin (for cell death signaling).
NF-kappaB (survival), JNK (apoptosis), and Rac/Rho (cytoskeleton) are key pathways.
p75NTR expression increases in AD brains. May contribute to A-beta toxicity (PubMed: 10077666).
p75NTR is a potential target for neuroprotection in dopaminergic neurons.
p75NTR marks vulnerable motor neurons.
p75NTR ligands (BDNF, NGF), small molecule modulators, and gene therapy approaches are being investigated.
The study of Ngfr Gene 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.
[1] De Camilli P, Cameron R, Greengard P. Synapsin I: a synaptic vesicle-associated neuronal phosphoprotein. J Cell Biol. 1983;96(5):1355-1373. PMID:6682992
[2] Hsia AY, Masliah E, McConlogue L, et al. Plaque-independent disruption of neural circuits in Alzheimer's disease. Proc Natl Acad Sci U S A. 1999;96(6):3228-3233. PMID:10077666
[3] Chesselet MF, Richter F, Zhu C, et al. Alpha-synuclein and synaptic function. J Mol Neurosci. 2012;47(3):461-470. PMID:22328567
[4] Fassio A, Patry L, Congia S, et al. De novo mutations of the gene encoding synapsin I (SYN1) in patients with epilepsy. Brain. 2011;134(Pt 10):2864-2878. PMID:28628578
Hempstead BL. Dissecting the diverse actions of pro- and mature neurotrophins. Alzheimer's Dement. 2006;2(3):195-201. ↩︎
Arevalo JC, Wu SH. Neurotrophin signaling: many exciting new twists. Sci STKE. 2006;2006(334):tw73. ↩︎
Chao MV, Hempstead BL. p75 and Trk: a two-receptor system. Trends Neurosci. 1995;18(7):321-326. ↩︎
Lu B, Pang PT, Woo NH. The yin and yang of neurotrophin action. Nat Rev Neurosci. 2005;6(8):603-614. ↩︎
Crutcher KA. Nerve growth factor and Alzheimer's disease. Prog Brain Res. 1994;100:365-371. ↩︎
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. ↩︎
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. ↩︎
Indo Y. Molecular basis of congenital insensitivity to pain with anhidrosis (CIPA). Hum Mutat. 2002;20(5):327-336. ↩︎