CASP10 Gene

CASP10 (Caspase 10)

Overview

CASP10 encodes Caspase-10, a member of the cysteine-aspartic protease family that plays crucial roles in both [apoptosis](/entities/apoptosis) (programmed cell death) and [necroptosis](/entities/necroptosis) (programmed necrosis). Located on chromosome 2q33.3, CASP10 is an initiator caspase that transduces death signals from cell surface receptors to the intracellular cell death machinery[@caspase2020].

Unlike its closely related homolog CASP8, CASP10 has additional roles in immune regulation and can function as both a pro-apoptotic and anti-apoptotic molecule depending on context. This dual functionality makes CASP10 a critical regulator of cell fate in both physiological and pathological conditions[@caspase2019].

In the central nervous system, CASP10 is implicated in neuronal development, synaptic plasticity, and the pathogenesis of major neurodegenerative diseases including [Alzheimer's disease](/diseases/alzheimers-disease) and [Parkinson's disease](/diseases/parkinsons-disease). Its expression and activity are altered in these conditions, contributing to the characteristic neuronal loss[@regulation2021].

Gene Information

CASP10 (Caspase 10)

Overview

CASP10 encodes Caspase-10, a member of the cysteine-aspartic protease family that plays crucial roles in both [apoptosis](/entities/apoptosis) (programmed cell death) and [necroptosis](/entities/necroptosis) (programmed necrosis). Located on chromosome 2q33.3, CASP10 is an initiator caspase that transduces death signals from cell surface receptors to the intracellular cell death machinery[@caspase2020].

Unlike its closely related homolog CASP8, CASP10 has additional roles in immune regulation and can function as both a pro-apoptotic and anti-apoptotic molecule depending on context. This dual functionality makes CASP10 a critical regulator of cell fate in both physiological and pathological conditions[@caspase2019].

In the central nervous system, CASP10 is implicated in neuronal development, synaptic plasticity, and the pathogenesis of major neurodegenerative diseases including [Alzheimer's disease](/diseases/alzheimers-disease) and [Parkinson's disease](/diseases/parkinsons-disease). Its expression and activity are altered in these conditions, contributing to the characteristic neuronal loss[@regulation2021].

Gene Information

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#f0f0f0;">CASP10 Gene Information</th></tr>
<tr><th>Symbol</th><td>CASP10</td></tr>
<tr><th>Full Name</th><td>Caspase 10</td></tr>
<tr><th>Chromosomal Location</th><td>2q33.3</td></tr>
<tr><th>NCBI Gene ID</th><td>[843](https://www.ncbi.nlm.nih.gov/gene/843)</td></tr>
<tr><th>OMIM</th><td>[601761](https://www.omim.org/entry/601761)</td></tr>
<tr><th>Ensembl</th><td>ENSG00000127334</td></tr>
<tr><th>UniProt</th><td>[Q9U2H7](https://www.uniprot.org/uniprot/Q9U2H7)</td></tr>
<tr><th>Gene Type</th><td>Protein coding</td></tr>
<tr><th>Genomic Length</th><td>46,847 bp</td></tr>
<tr><th>Protein Length</th><td>521 amino acids</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
</div>

Protein Structure and Function

Structural Domains

Caspase-10 contains several key structural features:

Activation Mechanism

Caspase-10 exists as an inactive zymogen (procaspase-10) in the cytoplasm. Activation occurs through:

Dual Functions

Unlike CASP8, CASP10 exhibits context-dependent dual functionality:

• Pro-apoptotic: In some contexts, CASP10 can initiate apoptosis through the extrinsic pathway
• Anti-apoptotic: CASP10 can also inhibit necroptosis by cleaving key necroptotic proteins, particularly when CASP8 is deficient[@necroptosis2023]

Role in Neurodegeneration

Alzheimer's Disease

In [Alzheimer's disease](/diseases/alzheimers-disease), CASP10 contributes to disease pathogenesis through multiple mechanisms[@caspase2019][@neuroinflammation2021]:

• Neuronal Apoptosis: CASP10 is activated by amyloid-beta ([Aβ](/proteins/amyloid-beta)) toxicity through death receptor pathways, leading to synaptic loss and neuronal death.
• Tau Pathology: CASP10 can cleave [tau](/proteins/tau) protein, generating truncated fragments that may promote neurofibrillary tangle formation.
• Neuroinflammation: CASP10 participates in inflammatory signaling cascades involving [NF-κB](/entities/nf-kb), amplifying microglial activation and cytokine production[@nfkb2022].
• Synaptic Dysfunction: CASP10 activation contributes to the loss of synaptic proteins including PSD-95 and synaptophysin, correlating with cognitive decline[@synaptic2018].

Parkinson's Disease

In [Parkinson's disease](/diseases/parkinsons-disease), CASP10 mediates dopaminergic neuron death through[@parkinsons2019][@deathreceptors2018]:

• α-Synuclein Toxicity: Oligomeric [α-synuclein](/proteins/alpha-synuclein) activates death receptors, recruiting CASP10 to initiate apoptosis.
• Oxidative Stress: Increased [reactive oxygen species](/entities/reactive-oxygen-species) (ROS) sensitize neurons to death receptor signaling.
• Neuroinflammation: Activated [microglia](/cell-types/microglia) express Fas ligand, engaging the extrinsic apoptotic pathway in dopaminergic neurons.
• Mitochondrial Dysfunction: CASP10 can intersect with the intrinsic apoptotic pathway through cross-talk mechanisms[@mitochondrial2017].

Other Neurodegenerative Conditions

• Huntington's Disease: CASP10 contributes to striatal neuron death through mutant [huntingtin](/proteins/huntingtin)-mediated death receptor activation.
• Amyotrophic Lateral Sclerosis (ALS): CASP10 is activated in motor neurons undergoing degeneration.
• Stroke and Ischemia: CASP10 mediates neuronal death following cerebral ischemia through TNF-α and Fas ligand signaling.

Death Receptor Pathways

Fas/CD95 Pathway

The Fas (CD95) receptor is a key trigger of CASP10 activation[@fas2019]:

TRAIL Pathway

TRAIL (TNF-related apoptosis-inducing ligand) receptors represent another important pathway[@trail2020]:

• TRAIL-R1 (DR4): Death receptor 4
• TRAIL-R2 (DR5): Death receptor 5

TNF-α/TNFR1 Pathway

TNF-α signaling can activate CASP10 through TNFR1, with the outcome depending on cellular context[@nfkb2022]:

• Pro-survival: NF-κB activation leads to anti-apoptotic gene expression
• Pro-death: When NF-κB is inhibited, CASP10 activation triggers apoptosis

Expression in the Brain

Caspase-10 is expressed in various brain regions with specific patterns:

| Brain Region | Expression Level | Cell Types |
|--------------|-----------------|------------|
| [Cortex](/brain-regions/cortex) | Moderate-high | Pyramidal neurons, interneurons |
| [Hippocampus](/brain-regions/hippocampus) | High | CA1-CA3 neurons, dentate gyrus granule cells |
| [Substantia Nigra](/brain-regions/substantia-nigra) | Moderate | Dopaminergic neurons |
| [Cerebellum](/brain-regions/cerebellum) | Moderate | Purkinje cells, granule cells |
| [Striatum](/brain-regions/striatum) | Moderate | Medium spiny neurons |

Expression is dynamically regulated by neuronal activity, stress, and disease states.

Therapeutic Implications

Targeting CASP10

CASP10 represents a potential therapeutic target for neurodegenerative diseases[@inhibitor2021]:

| Approach | Mechanism | Status | Challenges |
|----------|-----------|--------|------------|
| Z-LETD-FMK | CASP10 inhibitor | Preclinical | Specificity |
| siRNA | Gene silencing | Research | Delivery |
| Dominant-negative | Competitive inhibition | Research | Targeting |
| Peptide inhibitors | Blocking activation | Preclinical | Stability |

Challenges in Targeting

• Complexity: CASP10 has both pro- and anti-apoptotic functions depending on context
• Cross-talk: Caspase pathways intersect at multiple points
• Blood-brain barrier: Drug delivery to the CNS remains challenging
• Specificity: Pan-caspase inhibitors have adverse effects

Biomarker Potential

CASP10 activation products (cleaved caspase-10) can serve as biomarkers for disease progression and treatment response[@biomarkers2022]:

• Detectable in cerebrospinal fluid (CSF)
• Correlates with disease severity
• May predict treatment response

Genetic Associations

Polymorphisms

Several CASP10 polymorphisms have been associated with disease risk:

• rs4645978: Associated with AD risk in some populations
• rs4645981: May affect caspase expression levels

Mutations

Germline CASP10 mutations cause:

• Autoimmune Lymphoproliferative Syndrome (ALPS): Type IIA[@alps2018]
• Increased susceptibility to lymphoma

Interaction Network

Caspase-10 interacts with multiple proteins in the cell death machinery:

| Partner | Interaction Type | Function |
|---------|-----------------|----------|
| FADD | Direct binding | Recruitment to DISC |
| CFLAR (c-FLIP) | Direct binding | Regulation of activation |
| XIAP | Direct binding | Inhibitory interaction |
| Caspase-3 | Substrate | Downstream effector activation |
| Caspase-8 | Homolog | Functional redundancy |
| Bid | Substrate | Cross-talk to intrinsic pathway |
| Apaf-1 | Indirect | Apoptosome formation |

Disease Associations Summary

| Disease | CASP10 Role | Key Evidence |
|---------|-------------|--------------|
| [Alzheimer's Disease](/diseases/alzheimers-disease) | Neuronal apoptosis, tau cleavage | Elevated in AD brain[@caspase2019] |
| [Parkinson's Disease](/diseases/parkinsons-disease) | Dopaminergic neuron death | Activated in PD models |
| Stroke | Ischemic injury | Mediates reperfusion injury |
| ALS | Motor neuron death | Elevated in ALS models |
| Huntington's Disease | Striatal neuron death | Death receptor activation |

Cross-Linked Pathways

Connected Mechanisms

• [Apoptosis Pathway](/mechanisms/apoptosis-neurodegeneration)
• [Necroptosis Pathway](/entities/necroptosis)
• [Neuroinflammation Pathway](/mechanisms/neuroinflammation-pathway)
• [Death Receptor Signaling](/entities/death-receptors)
• [NF-kB Signaling](/entities/nf-kb)

Connected Proteins

• [CASP8](/entities/caspases) - Homolog with overlapping functions
• [CASP3](/entities/caspases) - Downstream effector caspase
• [FADD](/proteins/fadd-protein) - Adapter protein
• [FAS](/proteins/fas-protein) - Death receptor
• [TNF-α](/proteins/tnf-alpha-protein) - Cytokine ligand

See Also

• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Apoptosis Pathway](/mechanisms/apoptosis-neurodegeneration)
• [Necroptosis](/entities/necroptosis)
• [Death Receptors](/entities/death-receptors)
• [Caspase Family](/entities/caspases)
• [Neuroinflammation](/mechanisms/neuroinflammation-pathway)

External Links

• [NCBI Gene: CASP10](https://www.ncbi.nlm.nih.gov/gene/843)
• [Ensembl: ENSG00000127334](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000127334)
• [UniProt: Q9U2H7](https://www.uniprot.org/uniprot/Q9U2H7)
• [OMIM: 601761](https://www.omim.org/entry/601761)
• [GeneCards: CASP10](https://www.genecards.org/cgi-bin/carddisp.pl?gene=CASP10)

Overview

CASP10 (Caspase-10) is a member of the cysteine-aspartic protease family involved in apoptosis and immune signaling. Located on chromosome 2q33-34, CASP10 encodes a protein involved in both cell death and immune regulation[1].

Molecular Biology

Gene Structure

The CASP10 gene contains multiple exons and produces several isoforms through alternative splicing. The protein shares structural similarity with other caspases but has unique regulatory features.

Protein Structure

Caspase-10 (~500 aa):

• Prodomain with DED (Death Effector Domain)
• Catalytic subunits (large and small)
• Active site with catalytic cysteine

Expression

• Highest in immune tissues (spleen, thymus)
• Detectable in brain and other organs
• Cell-type specific expression patterns

Pathophysiology

Role in Apoptosis

Caspase-10 functions in both extrinsic and intrinsic apoptotic pathways:

Extrinsic Pathway:

• Death receptor activation (Fas, TRAIL)
• DISC complex formation
• Direct activation of effector caspases

• Integration with mitochondrial pathway
• Regulation by anti-apoptotic proteins

Immune Functions

Lymphocyte Development:

• T cell receptor signaling
• B cell function
• Immune cell homeostasis

• NF-κB pathway interactions
• Cytokine processing

Disease Associations

Neurodegeneration

Alzheimer's Disease:

• Limited direct evidence
• Possible interactions with other caspases
• Research ongoing

• Autoimmune diseases
• Cancer (dual role)
• Developmental disorders

Autoimmunity

ALPS (Autoimmune Lymphoproliferative Syndrome):

• Germline mutations identified
• Dysregulated apoptosis
• Treatment implications

Therapeutic Implications

Drug Development

Inhibitors:

• Small molecule development
• Selective vs broad-spectrum
• Clinical candidates

• Autoimmune diseases
• Cancer therapy
• Transplant rejection

Research Status

• Fewer studies than CASP3/CASP8
• Unique functions being characterized
• Therapeutic potential recognized

References

[^1]: CASP10 gene and protein studies. Various sources.

References