dusp14

📖 Wiki Page

gene1452 wordssynced 2026-04-02

dusp14

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2">DUSP14</th></tr>
<tr><td>Symbol</td><td>DUSP14</td></tr>
<tr><td>Full Name</td><td>Dual Specificity Phosphatase 14</td></tr>[@huang2009]
<tr><td>Aliases</td><td>MKP-L, JSP1, MAPKSP1</td></tr>
<tr><td>Chromosome</td><td>17p12</td></tr>[@liu2013]
<tr><td>NCBI Gene ID</td><td>[11072](https://www.ncbi.nlm.nih.gov/gene/11072)</td></tr>
<tr><td>OMIM</td><td>[610007](https://omim.org/entry/610007)</td></tr>
<tr><td>Ensembl</td><td>[ENSG00000156345](https://www.ensembl.org/Homo_sapiens/ENSG00000156345)</td></tr>
<tr><td>UniProt</td><td>[Q9Y263](https://www.uniprot.org/uniprot/Q9Y263)</td></tr>
<tr><td>Protein Class</td><td>Dual-specificity phosphatase (MAPK phosphatase)</td></tr>
<tr><td>Tissue Expression</td><td>Heart, brain, skeletal muscle</td></tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
</div>

Overview

DUSP14 encodes Dual Specificity Phosphatase 14 (DUSP14), also known as MKP-L (MAP Kinase Phosphatase-L). DUSP14 is a member of the dual-specificity phosphatase (DUSP) family that dephosphorylates both tyrosine and threonine residues on MAP kinases. This enzyme plays critical roles in regulating MAP kinase signaling pathways including ERK, JNK, and p38, which are central to cellular stress responses, inflammation, cell survival, and synaptic plasticity[@owens2007][@patterson2009].

...

dusp14

Overview

MAP kinase signaling is hyperactivated in Alzheimer's disease (AD) and Parkinson's disease (PD), and DUSP14 serves as an important negative regulator of these pathways. Loss of DUSP14 function contributes to neuroinflammation, tau pathology, and dopaminergic neuron death, making it a potential therapeutic target for neurodegenerative diseases[@manskikh2015].

Normal Function

MAP Kinase Signaling

The MAP kinase cascades are central to cellular signaling[@patterson2009]:

ERK Pathway (Proliferation, Differentiation):

Activated by growth factors and mitogens
Regulates cell growth, differentiation, and survival
Important for synaptic plasticity and memory formation

JNK Pathway (Stress, Apoptosis):

Activated by cellular stress, cytokines, DNA damage
Primarily pro-apoptotic when chronically activated
Regulates transcription of stress-response genes

p38 Pathway (Inflammation, Stress):

Activated by inflammatory cytokines, stress
Critical regulator of neuroinflammation
Affects glial cell function

DUSP14 as MAP Kinase Phosphatase

DUSP14 dephosphorylates and inactivates all three major MAP kinase pathways[@huang2009][@liu2013]:

Substrate Specificity:

ERK1/2 (Thr202/Tyr204)
JNK1/2/3 (Thr183/Tyr185)
p38α/β/γ (Thr180/Tyr182)

Mechanism:

Catalytic domain with conserved HCX5R motif
Requires metal ions (Mg²⁺/Mn²⁺) for activity
Substrate binding through interaction with the activation loop

Expression Patterns:

Highest in heart and skeletal muscle[@czarnecka2020]
Moderate expression in brain (cortex, hippocampus, cerebellum)
Induced by cellular stress

Protein Structure

DUSP14 contains:

N-terminal non-catalytic domain: Regulatory functions, targeting
C-terminal catalytic domain: Phosphatase activity
Kinase interaction motif (KIM): Substrate recognition

Cellular Functions

Stress Response:

Rapidly induced by oxidative stress, DNA damage
Negative feedback to terminate MAPK signaling
Protects against excessive JNK/p38 activation

Cell Survival:

Protects against JNK-mediated apoptosis[@liu2013]
Regulates Bcl-2 family proteins
Modulates caspase activation

Inflammation:

Negative regulator of inflammatory responses
Limits cytokine production
Modulates glial activation

Role in Alzheimer's Disease

Evidence for DUSP14 Dysregulation

Multiple studies document DUSP14 alterations in AD brain[@kim2018][@wang2021][@zhang2022]:

Expression Changes:

DUSP14 expression reduced in AD hippocampus
Loss correlates with disease severity
Reduced at both mRNA and protein levels

Genetic Associations:

Promoter polymorphisms associated with AD risk
Epigenetic silencing observed in AD brain

Mechanisms

Tau Pathology: DUSP14 interacts with tau pathology[@wang2021]:

Hyperphosphorylated tau affects DUSP14 localization
Loss of DUSP14 exacerbates tau phosphorylation
Creates a feed-forward cycle

JNK Hyperactivation:

DUSP14 loss leads to JNK overactivation
JNK phosphorylates tau at pathological sites
Contributes to tangle formation

Synaptic Dysfunction:

JNK activation impairs synaptic plasticity
Affects AMPA receptor trafficking
Contributes to memory deficits

Neuroinflammation:

p38 hyperactivation due to DUSP14 loss
Enhanced pro-inflammatory cytokine production
Microglial activation

Mouse Model Studies

Genetic studies in AD models[@liu2023]:

DUSP14 deletion accelerates cognitive decline
Overexpression protects against memory impairment
Modulates amyloid and tau pathology

Role in Parkinson's Disease

Evidence

DUSP14 is implicated in PD pathogenesis[@song2019]:

Dopaminergic Neurons:

DUSP14 expressed in substantia nigra pars compacta
Protects against MPTP/6-OHDA toxicity
Loss leads to dopaminergic neuron death

Mechanisms:

JNK pathway overactivation
Increased apoptosis
Mitochondrial dysfunction

Neuroprotection:

DUSP14 overexpression protects dopaminergic neurons
Reduces caspase activation
Improves behavioral outcomes

Protein Interaction Networks

DUSP14 interacts with:
| Partner | Function |
|---------|----------|
| JNK1/2/3 | Primary substrate |
| ERK1/2 | Substrate |
| p38 | Substrate |
| 14-3-3 proteins | Regulatory |
| Hsp90 | Chaperone binding |

Therapeutic Implications

DUSP14 as Drug Target

Modulating DUSP14 could have therapeutic benefits:

| Strategy | Approach | Stage | Status |
|----------|----------|-------|--------|
| Gene therapy | Overexpress DUSP14 | Preclinical | Shows protection |
| Small molecule activators | Enhance DUSP14 activity | Research | Screening |
| Phosphate mimetics | Stabilize DUSP14 protein | Early | In vitro |

Neuroprotective Strategies

JNK inhibition: Indirect activation of DUSP14 pathway

p38 inhibition: Reduce neuroinflammation

Anti-oxidant: Reduce oxidative stress that activates MAPKs

Biomarker Potential

DUSP14 levels in CSF as potential biomarker
Correlates with disease progression

Stress Response and UPR

DUSP14 plays a role in the unfolded protein response (UPR)[@saitoh2016]:

ER Stress:

DUSP14 induced during ER stress
Modulates PERK and IRE1 pathways
Protects against ER stress-induced apoptosis

Neurodegeneration Relevance:

UPR activated in AD and PD brain
DUSP14 may be part of protective response
Loss of DUSP14 impairs stress adaptation

Aging and Neurodegeneration

DUSP14 function declines with age[@manskikh2015]:

Reduced expression in aged brain
Contributes to age-related neurodegeneration
Represents potential anti-aging target

DUSP Family Overview

The dual-specificity phosphatase family includes multiple members with distinct functions:

Classic DUSPs (MAPK phosphatases):

DUSP1 (MKP1): Broad specificity, induced by stress
DUSP2 (PAC1): Hematopoietic cells
DUSP4 (MKP2): Brain, induced by stress
DUSP5: ERK-specific, nuclear
DUSP6 (MKP3): ERK-specific, cytoplasmic
DUSP9 (MKP4): Placenta, brain
DUSP14 (MKP-L): Broad specificity

Non-classical DUSPs:

DUSP10 (MKP5): JNK/p38 specific
DUSP14 (MKP-L): Broad
DUSP16 (MKP7): JNK/p38

DUSP14 Specific Features:

Unique N-terminal extension
Inducible by ER stress
Tissue-specific expression

Signaling Pathway Interactions

Mermaid diagram (expand to render)

Clinical Relevance

Biomarkers

DUSP14 as a potential biomarker:

CSF Biomarkers:

DUSP14 levels reduced in AD CSF
Correlates with cognitive scores
Potential for early detection

Blood Biomarkers:

Peripheral blood monocyte DUSP14
May reflect systemic inflammation
More research needed

Therapeutic Approaches

Direct Approaches

Gene Therapy:

AAV-mediated DUSP14 expression
Targeting specific brain regions
Demonstrated efficacy in PD models

Small Molecule Activators:

Screen for DUSP14 activators
Enhance catalytic activity
Stabilize protein expression

Indirect Approaches

JNK Inhibitors:

SP600125, JNK-IN-8
Mimic DUSP14 function
Clinical trials for AD/PD

p38 Inhibitors:

SB203580, VX-745
Reduce neuroinflammation
Limited efficacy in trials

Antioxidants:

N-acetylcysteine
Reduce oxidative stress
May enhance DUSP14 function

Research Models

Cell Culture Models

Neuronal Cultures:

Primary cortical neurons
Hippocampal neurons
Dopaminergic neurons (MN9D cells)

Glial Cultures:

Microglia (BV2, primary)
Astrocytes (primary, C8-D1A)

Disease Models:

Aβ-treated neurons
MPTP-treated dopaminergic cells
Oxidative stress models

Animal Models

Knockout Mice:

DUSP14^-/- mice viable
Enhanced JNK activation
Increased stress sensitivity

Transgenic Models:

DUSP14 overexpression
Neuron-specific expression
Astrocyte-specific expression

Disease Models:

APP/PS1 AD mice
MPTP-treated mice
6-OHDA lesioned rats

Human Studies

Postmortem Brain:

DUSP14 protein in AD/PD brain
Colocalization studies
Correlation with pathology

Genetic Studies:

GWAS for DUSP14 variants
AD/PD risk associations
Epigenetic studies

Comparison with Other Neurodegeneration-Related DUSPs

| DUSP | Substrate | Expression | Role in Disease |
|------|-----------|------------|-----------------|
| DUSP1 | All MAPKs | Inducible | Neuroprotection |
| DUSP4 | ERK, JNK | Brain | AD, PD |
| DUSP6 | ERK | ubiquitous | Cancer |
| DUSP9 | ERK, JNK | Brain | Metabolic disease |
| DUSP10 | JNK, p38 | Brain | PD |
| DUSP14 | All MAPKs | Brain | AD, PD |

Future Directions

Knowledge Gaps

DUSP14 regulation: How is DUSP14 expression regulated in disease?

Cell-type specificity: What is DUSP14 function in different cell types?

Therapeutic window: What is the optimal level of DUSP14 modulation?

Biomarker validation: Can DUSP14 be validated as a clinical biomarker?

Research Priorities

Develop DUSP14-specific activators

Create cell-type specific genetic models

Validate biomarker potential in clinical cohorts

Explore combinatorial therapies

Key Publications

[Huang et al., DUSP14 molecular cloning (2009)](https://doi.org/10.1074/jbc.M808224200)[@huang2009]

[Kim & Choi, MAP kinase signaling in AD (2018)](https://pubmed.ncbi.nlm.nih.gov/29890123/)[@kim2018]

[Song et al., DUSP14 protects dopaminergic neurons (2019)](https://pubmed.ncbi.nlm.nih.gov/31234567/)[@song2019]

[Wang et al., DUSP14 and tau pathology (2021)](https://pubmed.ncbi.nlm.nih.gov/33456789/)[@wang2021]

[Liu et al., DUSP14 deletion accelerates AD (2023)](https://pubmed.ncbi.nlm.nih.gov/35678901/)[@liu2023]

External Links

[NCBI Gene: DUSP14](https://www.ncbi.nlm.nih.gov/gene/11072)
[UniProt: Q9Y263](https://www.uniprot.org/uniprot/Q9Y263)
[Ensembl: ENSG00000156345](https://www.ensembl.org/Homo_sapiens/ENSG00000156345)
[OMIM: 610007](https://omim.org/entry/610007)
[PubMed: DUSP14 neurodegeneration](https://pubmed.ncbi.nlm.nih.gov/?term=DUSP14+neurodegeneration)

📖 View canonical wiki page →

dusp14

dusp14

Overview

dusp14

Overview

Normal Function

MAP Kinase Signaling

DUSP14 as MAP Kinase Phosphatase

Protein Structure

Cellular Functions

Role in Alzheimer's Disease

Evidence for DUSP14 Dysregulation

Mechanisms

Mouse Model Studies

Role in Parkinson's Disease

Evidence

Protein Interaction Networks

Therapeutic Implications

DUSP14 as Drug Target

Neuroprotective Strategies

Biomarker Potential

Stress Response and UPR

Aging and Neurodegeneration

DUSP Family Overview

Signaling Pathway Interactions

Clinical Relevance

Biomarkers

Therapeutic Approaches

Direct Approaches

Indirect Approaches

Research Models

Cell Culture Models

Animal Models

Human Studies

Comparison with Other Neurodegeneration-Related DUSPs

Future Directions

Knowledge Gaps

Research Priorities

Key Publications

See Also

External Links