WWOX Gene

WWOX Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">wwox</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>WWOX</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>WW Domain Containing Oxidoreductase</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>16q23.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>54345</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>605515</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>Q9H0M0</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>[Alzheimer Disease](/diseases/alzheimers-disease), Spinocerebellar Ataxia, [Parkinson Disease](/diseases/parkinsons-disease)</td>
</tr>
</table>

Introduction

WWOX (WW Domain Containing Oxidoreductase), also known as FOR or WOX1, encodes a tumor suppressor protein with two WW domains and a short-chain dehydrogenase/reductase (SDR) domain. Biallelic WWOX mutations cause autosomal recessive spinocerebellar ataxia type 12 (SCAR12), and the gene has been increasingly implicated in [Alzheimer disease](/diseases/alzheimers-disease) and [Parkinson disease](/diseases/parkinsons-disease) pathogenesis [@aqeilan2009].

The WWOX protein is unique among tumor suppressors in that it contains both protein-interaction WW domains and an enzymatically active SDR domain, giving it multiple mechanisms of action in cellular regulation [@iliopoulos2009].

Overview

WWOX Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">wwox</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>WWOX</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>WW Domain Containing Oxidoreductase</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>16q23.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>54345</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>605515</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>Q9H0M0</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>[Alzheimer Disease](/diseases/alzheimers-disease), Spinocerebellar Ataxia, [Parkinson Disease](/diseases/parkinsons-disease)</td>
</tr>
</table>

Introduction

WWOX (WW Domain Containing Oxidoreductase), also known as FOR or WOX1, encodes a tumor suppressor protein with two WW domains and a short-chain dehydrogenase/reductase (SDR) domain. Biallelic WWOX mutations cause autosomal recessive spinocerebellar ataxia type 12 (SCAR12), and the gene has been increasingly implicated in [Alzheimer disease](/diseases/alzheimers-disease) and [Parkinson disease](/diseases/parkinsons-disease) pathogenesis [@aqeilan2009].

The WWOX protein is unique among tumor suppressors in that it contains both protein-interaction WW domains and an enzymatically active SDR domain, giving it multiple mechanisms of action in cellular regulation [@iliopoulos2009].

Overview

The WWOX gene encodes a 414-amino acid protein that functions as a tumor suppressor and redox regulator. WWOX is highly expressed in the brain, particularly in the [cerebellum](/brain-regions/cerebellum), [cortex](/brain-regions/cortex), and [hippocampus](/brain-regions/hippocampus), where it plays critical roles in neuronal development, synaptic function, and response to oxidative stress.

Dysregulation or mutation of WWOX contributes to the pathogenesis of neurodegenerative disorders through multiple mechanisms, including impaired redox homeostasis, dysregulated [apoptosis](/entities/apoptosis), and altered protein aggregation [@tumbazaritskaya2021].

Basic Information

Protein Structure and Function

Molecular Architecture

WWOX is a 414-amino acid protein with two distinct functional domains:

The WW domains mediate protein-protein interactions with key regulatory proteins including p53, Apc, and transcription factors. The SDR domain catalyzes redox reactions, particularly involving quinones [@cheng2019].

Tissue Distribution

• Brain: High expression in cerebellum, cortex, and hippocampus
• Peripheral tissues: Moderate expression in lung, breast, ovary
• Cellular localization: Cytoplasm, synaptic vesicles, mitochondria

Physiological Roles

Role in Neurodegeneration

Alzheimer Disease

WWOX has emerged as an important player in [Alzheimer disease](/diseases/alzheimers-disease) pathogenesis. Postmortem studies show reduced WWOX expression in AD brains, and mouse models demonstrate that WWOX deficiency accelerates neuronal death in the presence of amyloid-beta pathology [@jung2015]. Proposed mechanisms include:

• Tau phosphorylation: WWOX modulates tau phosphorylation through regulation of kinases [@cheng2019]
• Amyloid-beta toxicity: WWOX protects against amyloid-beta induced neurotoxicity [@ouyang2018]
• Oxidative stress: Loss of WWOX impairs antioxidant responses
• Autophagy: WWOX deficiency leads to impaired autophagic clearance [@yang2022]

Parkinson Disease

In [Parkinson disease](/diseases/parkinsons-disease), WWOX may interact with alpha-synuclein and DJ-1 to modulate neuronal survival. The substantia nigra shows altered WWOX expression in PD models.

Spinocerebellar Ataxia Type 12 (SCAR12)

Biallelic loss-of-function mutations in WWOX cause autosomal recessive spinocerebellar ataxia type 12, characterized by:

• Early-onset cerebellar ataxia
• Developmental delay
• Seizures
• Progressive cerebellar atrophy [@mallaret2014]

Molecular Pathways

Disease Associations

Alzheimer Disease

• Expression: Reduced in AD brains [@fan2021]
• Mechanism: Impaired redox regulation, tau dysregulation
• Therapeutic target: WWOX-enhancing compounds under development

Spinocerebellar Ataxia Type 12

• Inheritance: Autosomal recessive
• Mutations: Loss-of-function variants
• Onset: Childhood
• Features: Ataxia, seizures, developmental delay [@mallaret2014]

Parkinson Disease

• Interaction: May modulate alpha-synuclein toxicity
• Expression: Altered in substantia nigra

Therapeutic Implications

Small Molecule activators

• WWOX-enhancing compounds: Being explored to upregulate WWOX expression
• SDR domain activators: Targeting the oxidoreductase domain

Gene Therapy

• AAV-WWOX: Being developed for SCAR12
• CRISPR approaches: Potential for correcting specific mutations

Drug Targets

Animal Models and Research

Mouse Models

WWOX knockout mice recapitulate aspects of the human phenotype, including neurodegeneration and increased tumor risk. These models have been instrumental in understanding WWOX's role in neuronal survival [@sze2012].

Cellular Models

• WWOX-knockout neurons: Show increased sensitivity to oxidative stress
• Amyloid-beta treated cells: WWOX provides protection
• Tau models: WWOX modulates tau pathology

Clinical Significance

Genetic Testing

• Clinical testing: Available for SCAR12 diagnosis
• Carrier screening: For at-risk families

Patient Management

• Neurological evaluation: Recommended for WWOX variant carriers
• Multidisciplinary care: Involves geneticists, neurologists

Key Publications

Research Gaps and Future Directions

Cross-References

• [Alzheimer Disease](/diseases/alzheimers-disease) - Primary disease association
• [Parkinson Disease](/diseases/parkinsons-disease) - Related neurodegenerative disorder
• [Spinocerebellar Ataxia](/diseases/spinocerebellar-ataxia) - Genetic ataxia
• [Tau Protein](/entities/tau-protein) - WWOX modulates phosphorylation
• [Amyloid-beta](/entities/amyloid-beta) - WWOX protects against toxicity
• [Oxidative Stress](/entities/oxidative-stress) - WWOX regulates redox balance
• [Apoptosis](/entities/apoptosis) - WWOX induces cell death

External Links

• [NCBI Gene](https://www.ncbi.nlm.nih.gov/gene/54345) - Gene database
• [UniProt](https://www.uniprot.org/uniprot/Q9H0M0) - Protein database
• [OMIM](https://www.omim.org/entry/605515) - Online Mendelian Inheritance in Man
• [PubMed](https://pubmed.ncbi.nlm.nih.gov/?term=WWOX+neurodegeneration) - Literature search

Pathway Diagram

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