TIMD4 Gene (T Cell Immunoglobulin and Mucin Domain Containing 4)

TIMD4 Gene (T Cell Immunoglobulin and Mucin Domain Containing 4)

Overview

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">TIMD4 Gene (T Cell Immunoglobulin and Mucin Domain Containing 4)</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>TIMD4</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>TIMD4 (T Cell Immunoglobulin and Mucin Domain Containing 4)</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=TIMD4" target="_blank">Search NCBI</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Gene Symbol: TIMD4 Full Name: T Cell Immunoglobulin and Mucin Domain Containing 4 Chromosomal Location: 5q33.3 NCBI Gene ID: [10578](https://www.ncbi.nlm.nih.gov/gene/10578) OMIM: [610131](https://www.omim.org/entry/610131) Ensembl ID: ENSG00000134030 UniProt: [Q9C0J8](https://www.uniprot.org/uniprot/Q9C0J8)

Function

The TIMD4 gene encodes TIM-4 (T-cell immunoglobulin and mucin domain-containing protein 4), a phosphatidylserine receptor that plays a critical role in the recognition and engulfment of apoptotic cells [@tim]. TIMD4 is primarily expressed on macrophages, dendritic cells, and [microglia](/cell-types/microglia-neuroinflammation) in the brain [@microglial].

Phosphatidylserine Recognition

TIMD4 Gene (T Cell Immunoglobulin and Mucin Domain Containing 4)

Overview

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">TIMD4 Gene (T Cell Immunoglobulin and Mucin Domain Containing 4)</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>TIMD4</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>TIMD4 (T Cell Immunoglobulin and Mucin Domain Containing 4)</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=TIMD4" target="_blank">Search NCBI</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Gene Symbol: TIMD4 Full Name: T Cell Immunoglobulin and Mucin Domain Containing 4 Chromosomal Location: 5q33.3 NCBI Gene ID: [10578](https://www.ncbi.nlm.nih.gov/gene/10578) OMIM: [610131](https://www.omim.org/entry/610131) Ensembl ID: ENSG00000134030 UniProt: [Q9C0J8](https://www.uniprot.org/uniprot/Q9C0J8)

Function

The TIMD4 gene encodes TIM-4 (T-cell immunoglobulin and mucin domain-containing protein 4), a phosphatidylserine receptor that plays a critical role in the recognition and engulfment of apoptotic cells [@tim]. TIMD4 is primarily expressed on macrophages, dendritic cells, and [microglia](/cell-types/microglia-neuroinflammation) in the brain [@microglial].

Phosphatidylserine Recognition

TIMD4 binds specifically to phosphatidylserine (PS) exposed on the surface of apoptotic cells. This recognition mechanism is essential for:

• Apoptotic Cell Clearance: TIMD4 mediates the engulfment of dying cells, preventing the release of intracellular contents that could trigger inflammatory responses [@phosphatidylserine]
• Immune Tolerance: Proper clearance of apoptotic cells by TIMD4-expressing phagocytes prevents autoimmunity
• Resolution of Inflammation: TIMD4 contributes to the anti-inflammatory environment during tissue repair

Microglial Function

In the central nervous system, TIMD4 is expressed on microglia, the resident immune cells of the brain. Microglial TIMD4 plays important roles in:

• Synaptic Pruning: During development, microglia use TIMD4 to recognize and eliminate excess synapses
• Neuroinflammation: TIMD4-mediated clearance of apoptotic [neurons](/entities/neurons) may influence neuroinflammatory processes in neurodegenerative diseases

Role in Neurodegenerative Diseases

Alzheimer's Disease

TIMD4 has been implicated in Alzheimer's disease pathogenesis through several mechanisms:

• Microglial Activation: TIMD4 expression on microglia is altered in Alzheimer's disease brains, affecting the clearance of [amyloid-beta](/proteins/amyloid-beta) plaques and apoptotic neurons [@tima]
• Neuroinflammation: Dysregulated TIMD4 function may contribute to chronic neuroinflammation, a key feature of AD
• Phagocytic Clearance: Impaired TIMD4-mediated clearance of amyloid-beta may lead to plaque accumulation [@amyloidbeta]

Parkinson's Disease

In Parkinson's disease, TIMD4 may play roles in:

• Dopaminergic Neuron Survival: TIMD4-mediated clearance of dead dopaminergic neurons in the substantia nigra
• [Alpha-Synuclein](/proteins/alpha-synuclein) Clearance: Microglial phagocytosis of alpha-synuclein aggregates may involve TIMD4
• Neuroinflammation: TIMD4 contributes to microglial responses in PD [@microgliala]

Amyotrophic Lateral Sclerosis

TIMD4 has been studied in ALS context:

• Motor Neuron Degeneration: TIMD4-mediated clearance of dying motor neurons
• Glial Activation: TIMD4 expression on [astrocytes](/entities/astrocytes) and microglia in ALS models [@timb]

Expression Patterns

TIMD4 exhibits tissue-specific expression:

• Brain: Expressed on microglia, particularly in regions with high neuronal density
• Immune System: High expression on macrophages, dendritic cells, and splenic marginal zone macrophages
• Peripheral Tissues: Moderate expression in liver, lung, and intestinal tissues

Therapeutic Implications

TIMD4 represents a potential therapeutic target for neurodegenerative diseases:

• Modulation of Microglial Phagocytosis: Enhancing TIMD4 function could improve clearance of pathological protein aggregates
• Anti-inflammatory Strategies: TIMD4-based therapies could reduce harmful neuroinflammation
• Drug Development: Small molecules targeting TIMD4-PS interaction are being investigated

Genetic Associations

• TIMD4 polymorphisms have been associated with autoimmune diseases
• Gene expression studies show altered TIMD4 levels in neurodegenerative disease brains
• TIMD4 is part of a gene network involving immune response and phagocytosis genes

Clinical Significance

Understanding TIMD4 function has clinical relevance for:

• Biomarker Development: TIMD4 expression levels as a marker of microglial activation
• Therapeutic Targeting: Developing modulators of TIMD4 function
• Disease Monitoring: TIMD4 in cerebrospinal fluid as a potential biomarker

See Also

• [TIM (T-cell Immunoglobulin and Mucin Domain) Family](/mechanisms/tim-family) - TIMD4 belongs to this protein family
• [Macrophage](/cell-types/macrophages) - TIMD4 expressed on macrophage surfaces
• [Alzheimer's Disease](/diseases/alzheimers-disease) - Immune response in neurodegeneration
• [Parkinson's Disease](/diseases/parkinsons-disease) - Neuroinflammation mechanisms

External Links

• [NCBI Gene: TIMD4](https://www.ncbi.nlm.nih.gov/gene/10578)
• [Ensembl: ENSG00000134030](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000134030)
• [UniProt: Q9C0J8](https://www.uniprot.org/uniprot/Q9C0J8)

References