NTF4 — Neurotrophin-4
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NTF4 — Neurotrophin-4</th>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Recombinant NT-4 protein</td>
<td>Research</td>
</tr>
<tr>
<td class="label">AAV-NT4 gene therapy</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecule TrkB agonists</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Neurotrophin</td>
<td>Primary Receptor</td>
</tr>
<tr>
<td class="label">NGF</td>
<td>TrkA</td>
</tr>
<tr>
<td class="label">BDNF</td>
<td>TrkB</td>
</tr>
<tr>
<td class="label">NT-3</td>
<td>TrkC</td>
</tr>
<tr>
<td class="label">NT-4</td>
<td>TrkB</td>
</tr>
</table>
Introduction
Ntf4 — Neurotrophin 4 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
```{.infobox .infobox-gene}
Gene Symbol: NTF4
Full Name: Neurotrophin-4
Chromosomal Location: 19q13.33
NCBI Gene ID: 4903
OMIM: 162662
Ensembl ID: ENSG00000185655
UniProt: P34130 (NT4_HUMAN)
Associated Diseases: Alzheimer's Disease, Parkinson's Disease, Glaucoma
```
Overview
...NTF4 — Neurotrophin-4
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">NTF4 — Neurotrophin-4</th>
</tr>
<tr>
<td class="label">Approach</td>
<td>Status</td>
</tr>
<tr>
<td class="label">Recombinant NT-4 protein</td>
<td>Research</td>
</tr>
<tr>
<td class="label">AAV-NT4 gene therapy</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecule TrkB agonists</td>
<td>Research</td>
</tr>
<tr>
<td class="label">Neurotrophin</td>
<td>Primary Receptor</td>
</tr>
<tr>
<td class="label">NGF</td>
<td>TrkA</td>
</tr>
<tr>
<td class="label">BDNF</td>
<td>TrkB</td>
</tr>
<tr>
<td class="label">NT-3</td>
<td>TrkC</td>
</tr>
<tr>
<td class="label">NT-4</td>
<td>TrkB</td>
</tr>
</table>
Introduction
Ntf4 — Neurotrophin 4 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
```{.infobox .infobox-gene}
Gene Symbol: NTF4
Full Name: Neurotrophin-4
Chromosomal Location: 19q13.33
NCBI Gene ID: 4903
OMIM: 162662
Ensembl ID: ENSG00000185655
UniProt: P34130 (NT4_HUMAN)
Associated Diseases: Alzheimer's Disease, Parkinson's Disease, Glaucoma
```
Overview
Mermaid diagram (expand to render)
NTF4 (Neurotrophin-4) is a neurotrophin with unique functions in synaptic plasticity and tissue repair. [@berkemeier1991]
Function
Neurotrophin-4 (NT-4) is the least studied member of the classical neurotrophin family, which includes NGF, BDNF, and NT-3. Despite its name, NT-4 primarily signals through the TrkB receptor (like BDNF), making it functionally related to BDNF. [@chao2003]
Normal Function
NT-4 binds to: [@bothwell2004]
- TrkB — primary high-affinity receptor
- p75^NTR — can mediate [apoptosis](/entities/apoptosis) or survival
Downstream Signaling Pathways
- PI3K/Akt pathway — promotes neuronal survival
- MAPK/ERK pathway — regulates differentiation and plasticity
- PLCγ pathway — modulates calcium signaling
Expression Pattern
NT-4 is expressed in: [@huang2003]
- Hippocampus
- Cerebral [cortex](/brain-regions/cortex)
- Basal forebrain
- Peripheral tissues including:
- Skeletal muscle
- Ovary
- Placenta
Unique Properties
NT-4 has several distinctive features:
- Can support neuronal survival in the absence of activity-dependent secretion
- More stable than BDNF in some contexts
- May have unique roles in specific neuronal populations
Disease Associations
Alzheimer's Disease
NT-4 is involved in:
- Hippocampal synaptic plasticity
- Cholinergic neuron maintenance
- Protection against amyloid toxicity
Research status: Less studied than BDNF in AD, but NT-4 can compensate for BDNF deficits in some models.
Parkinson's Disease
NT-4 may provide:
- Protection for dopaminergic [neurons](/entities/neurons)
- Support for striatal function
Therapeutic potential: NT-4 is being explored as an alternative to GDNF and BDNF for PD therapy.
Glaucoma
NT-4 is important for:
- Retinal ganglion cell survival
- Optic nerve function
Research: NT-4 gene therapy shows promise for retinal neuroprotection.
Peripheral Neuropathy
NT-4 supports:
- Sensory neuron survival
- Axonal regeneration after injury
Therapeutic Targeting
Key Publications
Neurotrophin-4: a new member of the neurotrophin family - EMBO J. 1991. PMID: 1846908(https://pubmed.ncbi.nlm.nih.gov/1846908/)
NT-4 and TrkB signaling in the brain - J Neurosci. 2001. PMID: 11299494(https://pubmed.ncbi.nlm.nih.gov/11299494/)
Neurotrophin-4 in retinal degeneration - Invest Ophthalmol Vis Sci. 2010. PMID: 20592233(https://pubmed.ncbi.nlm.nih.gov/20592233/)Cross-Links
- [NTF4 Protein](/proteins/ntf4-protein)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Hippocampus](/brain-regions/hippocampus)
- [Neurotrophin Signaling Pathway](/mechanisms/neurotrophin-signaling)
Therapeutic Potential
NTF4 (Neurotrophin-4) has unique therapeutic properties:
Memory Enhancement
NTF4 has been shown to enhance synaptic plasticity and memory formation in animal models. Unlike BDNF, NTF4's effects appear to be more specific to certain forms of learning.
Retinal Degeneration
NTF4 plays a protective role in photoreceptor survival and is being investigated for treatment of retinal degenerative diseases including age-related macular degeneration (AMD).
Wound Healing
NTF4 promotes cutaneous nerve regeneration and has been studied for its role in diabetic neuropathy and wound healing.
Comparison with Other Neurotrophins
NTF4 shares the TrkB receptor with BDNF but activates distinct signaling pathways and has unique physiological functions.
Background
The study of Ntf4 — Neurotrophin 4 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.
See Also
- [Genes Index](/genes)
- [NTF4 Protein](/proteins/ntf4-protein)
- [Neurotrophin Signaling](/mechanisms/neurotrophin-signaling)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Hippocampus](/brain-regions/hippocampus)
External Links
- [NTF4 Gene - NCBI Gene](https://www.ncbi.nlm.nih.gov/gene/4909)
- [NTF4 Gene - OMIM](https://www.omim.org/entry/162452)
- [NTF4 Protein - UniProt](https://www.uniprot.org/uniprot/P49130)
- [NTF4 Expression - Allen Brain Atlas](https://human.brain-map.org/microarray/search/show?search_term=NTF4)
References
Ip NY, et al, Mammalian neurotrophin-4: structure, chromosomal localization, tissue distribution, and receptor specificity (1992)
Berkemeier LR, et al, Neurotrophin-5: a novel neurotrophic factor that activates trk and trkB (1991)
Chao MV, et al, Neurotrophins and their receptors — a convergence point for many signalling pathways (2003)
Bothwell M, Evolution of the neurotrophin signaling system (2004)
Huang EJ, Reichardt LF, Trk receptors: roles in neuronal signal transduction (2003)Pathway Diagram
The following diagram shows the key molecular relationships involving NTF4 — Neurotrophin-4 discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)