PRDX2 — Peroxiredoxin 2

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PRDX2 — Peroxiredoxin 2

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PRDX2 — Peroxiredoxin 2

Introduction

Prdx2 — Peroxiredoxin 2 is a critical antioxidant enzyme in the neurobiology of neurodegenerative diseases. This page provides comprehensive information about its structure, function, and role in disease processes including Parkinson's disease, Alzheimer's disease, and amyotrophic lateral sclerosis.

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PRDX2 — Peroxiredoxin 2

Introduction

Prdx2 — Peroxiredoxin 2 is a critical antioxidant enzyme in the neurobiology of neurodegenerative diseases. This page provides comprehensive information about its structure, function, and role in disease processes including Parkinson's disease, Alzheimer's disease, and amyotrophic lateral sclerosis.

<table class="infobox infobox-gene"> [@tasset2012]
<tr> [@klammer2020]
<th class="infobox-header" colspan="2">PRDX2 — Peroxiredoxin 2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>PRDX2</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Peroxiredoxin 2</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>19p13.13</td>
</tr>
<tr>
<td class="label">NCBI Gene</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/7003" target="_blank">7003</a></td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td><a href="https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000167612" target="_blank">ENSG00000167612</a></td>
</tr>
<tr>
<td class="label">OMIM</td>
<td><a href="https://omim.org/entry/607386" target="_blank">607386</a></td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/P32189" target="_blank">P32189</a></td>
</tr>
<tr>
<td class="label">Diseases</td>
<td>Parkinson's Disease, Alzheimer's Disease, ALS, Stroke</td>
</tr>
<tr>
<td class="label">Expression</td>
<td>Erythrocytes, Brain, Liver, Kidney, Heart</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">11 edges</a></td>
</tr>
</table>

Overview

PRDX2 (Peroxiredoxin 2) is a gene located on chromosome 19p13.13 that encodes a member of the peroxiredoxin family of antioxidant proteins. PRDX2 is a typical 2-Cys peroxiredoxin that reduces hydrogen peroxide (H₂O₂), peroxynitrite (ONOO⁻), and organic hydroperoxides, playing crucial roles in cellular antioxidant defense and redox signaling. [@lee2011]

The peroxiredoxin family comprises six isoforms in mammals (PRDX1-6), with PRDX2 being one of the most abundant cytosolic antioxidants. It is particularly highly expressed in erythrocytes and various tissues including brain, liver, kidney, and heart. [@kim2008] PRDX2 functions as both a peroxidase and a molecular chaperone, making it uniquely positioned to protect cells against oxidative damage. [@risoa2009]

Structure and Biochemistry

Molecular Architecture

PRDX2 is a 22-kDa protein composed of 198 amino acids. Its structure consists of:

N-terminal region: Contains the first conserved cysteine (Cys⁵¹)
C-terminal region: Contains the resolving cysteine (Cys¹⁷²)
β-sheet core: Forms the catalytic center
C-terminal tail: Regulates enzyme activity

The protein exists primarily as a homodimer, with each monomer containing two conserved cysteine residues essential for catalytic activity. The active site contains a "peroxiredoxin signature" motif (FTFVCPTEI) that defines the 2-Cys peroxiredoxin family. [@wang2014]

Catalytic Mechanism

The enzymatic cycle of PRDX2 involves:

Peroxidation: The active-site peroxidatic cysteine (Cys⁵¹) reacts with H₂O₂ to form a sulfenic acid (SOH)

Disulfide formation: The sulfenic acid condenses with the resolving cysteine (Cys¹⁷²) to form an intramolecular disulfide

Reduction: Thioredoxin (Trx) or thioredoxin reductase reduces the disulfide back to the active dithiol form

Regeneration: The reduced enzyme is ready for another catalytic cycle

This catalytic mechanism allows PRDX2 to detoxify H₂O₂ at rates approaching diffusion-limited reactions, making it one of the most efficient antioxidant enzymes in the cell. [@yang2009]

Oligomerization and Chaperone Activity

Under oxidative stress conditions, PRDX2 undergoes a structural transition from a dimeric peroxidase to a high-molecular-weight decameric complex. This oligomerization is induced by:

Hyperoxidation of the active-site cysteine (Cys-SOH)
Phosphorylation at specific residues
Oxidative modifications

The decameric form exhibits chaperone activity, protecting proteins from oxidative aggregation. This dual functionality—peroxidase and chaperone—makes PRDX2 particularly important in neurodegenerative conditions where protein aggregation is a hallmark. [@hu2009]

Function

Antioxidant Defense

PRDX2 is a central component of the cellular antioxidant defense system:

Hydrogen peroxide detoxification: Reduces H₂O₂ to water using thioredoxin as the electron donor
Peroxynitrite scavenging: Protects against peroxynitrite (ONOO⁻), a highly reactive nitrogen species
Organic hydroperoxide reduction: Reduces lipid hydroperoxides, protecting membrane integrity
Redox signaling modulation: Controls the levels of H₂O₂ that serve as second messengers

In neurons, PRDX2 provides critical protection against oxidative damage from multiple sources including mitochondrial electron transport leak, inflammatory responses, and environmental toxins. [@mann2006]

Molecular Chaperone Function

When oxidized beyond its peroxidase capacity, PRDX2 transitions to a chaperone form that:

Prevents protein aggregation under oxidative stress
Helps refold denatured proteins
Protects against heat-induced protein damage
Maintains cellular proteostasis

This chaperone function is particularly important in [neurons](/entities/neurons), which are post-mitotic and cannot dilute damaged proteins through cell division. [@fujii2010]

Regulation of Cell Death Pathways

PRDX2 interacts with multiple cell death pathways:

Inhibition of apoptosis: By reducing oxidative stress and maintaining mitochondrial integrity
Regulation of JNK signaling: Oxidized PRDX2 releases ASK1, affecting downstream pro-apoptotic signals
Protection against necroptosis: By scavenging ROS that trigger necrotic cell death pathways

The balance between PRDX2's peroxidase and pro-apoptotic functions is regulated by its oxidation state and oligomeric status. [@yang2007]

Expression and Localization

Tissue Distribution

PRDX2 shows widespread expression:

Erythrocytes: Highest expression (~50% of cytosolic protein)
Brain: Neuronal expression in cortex, hippocampus, cerebellum
Liver: Hepatocyte expression
Kidney: Renal tubular cells
Heart: Cardiomyocytes

In the brain, PRDX2 is expressed in both neurons and glia, with particular enrichment in [dopaminergic neurons](/cell-types/dopaminergic-neurons) of the substantia nigra—neurons that degenerate in Parkinson's disease. [@eng2015]

Subcellular Localization

Cytosol: Primary location (~90% of cellular PRDX2)
Mitochondria: A fraction localizes to mitochondria
Nucleus: Some nuclear localization reported
Membrane: Association with plasma membrane under certain conditions

The cytosolic pool provides general antioxidant protection, while the mitochondrial fraction specifically protects against oxidative damage from electron transport chain leakage. [@ng2016]

Disease Associations

Parkinson's Disease

PRDX2 is oxidized and functionally inactivated in [Parkinson's disease](/diseases/parkinsons-disease) brain. Studies show:

Increased oxidation: PRDX2 shows higher levels of sulfinic/sulfonic acid oxidation in PD substantia nigra
Decreased activity: Enzymatic activity is reduced by ~40% in PD brain compared to controls
Interaction with alpha-synuclein: PRDX2 colocalizes with [alpha-synuclein](/proteins/alpha-synuclein) aggregates in Lewy bodies
Neuroprotection: Overexpression of PRDX2 protects dopaminergic neurons in models of PD

The oxidation of PRDX2 in PD may be both a consequence of increased oxidative stress and a contributor to disease progression through loss of antioxidant and chaperone functions. [@perez2018]

Key mechanisms in PD:

Mitochondrial complex I deficiency leads to increased ROS production

PRDX2 is overwhelmed and becomes hyperoxidized

Loss of peroxidase activity leads to further oxidative damage

Loss of chaperone activity contributes to alpha-synuclein aggregation

Creates a vicious cycle of oxidative damage and protein aggregation

Alzheimer's Disease

In [Alzheimer's disease](/diseases/alzheimers-disease), PRDX2 shows altered expression and oxidation:

Altered levels: PRDX2 expression is changed in AD brain regions vulnerable to pathology
Oxidation: Hyperoxidized PRDX2 is found in AD hippocampus and cortex
Amyloid-beta interaction: PRDX2 may protect against [amyloid-beta](/proteins/amyloid-beta) toxicity
Tau pathology: PRDX2 oxidation correlates with tau pathology severity

PRDX2 may protect against amyloid-beta-induced oxidative damage, and its downregulation in AD may contribute to the oxidative stress that drives disease progression. [@kim2019]

Amyotrophic Lateral Sclerosis (ALS)

PRDX2 oxidation has been reported in ALS models and patients:

Motor neuron vulnerability: Motor neurons show reduced PRDX2 compared to other neuronal populations
SOD1 interaction: PRDX2 may interact with mutant SOD1, which causes familial ALS
Oxidative stress: PRDX2 oxidation in ALS motor cortex correlates with disease duration

The selective vulnerability of motor neurons in ALS may be related to their relatively low PRDX2 levels compared to other neuronal populations. [@yang2020]

Stroke and Ischemic Injury

PRDX2 provides neuroprotection against ischemic injury:

Preconditioning: PRDX2 overexpression protects against cerebral ischemia
Reperfusion injury: PRDX2 levels decrease during reperfusion, contributing to oxidative damage
Therapeutic potential: PRDX2-based therapies are being explored for stroke treatment
Post-stroke recovery: PRDX2 affects rehabilitation outcomes through oxidative stress modulation

In models of focal cerebral ischemia, PRDX2 overexpression reduces infarct size and improves functional outcomes. Studies have shown that PRDX2 administration either as protein therapy or through gene delivery can significantly reduce brain damage following stroke. [@chen2019]

Multiple System Atrophy (MSA)

PRDX2 alterations have been observed in MSA:

Oligodendrocyte vulnerability: Reduced PRDX2 in oligodendrocytes
Myelin dysfunction: Connections to white matter pathology
Autonomic dysfunction: PRDX2 in autonomic nuclei
Progression markers: Correlation with disease severity

Progressive Supranuclear Palsy (PSP)

PRDX2 is implicated in PSP pathophysiology:

Brainstem vulnerability: PRDX2 changes in midbrain structures
Tau pathology intersection: Overlap with tauopathies
Neurodegeneration pattern: Region-specific alterations
Biomarker potential: CSF PRDX2 as PSP marker

Frontotemporal Dementia (FTD)

In FTD, PRDX2 shows:

Frontal cortex involvement: Altered expression in affected regions
TDP-43 pathology: Interaction with protein aggregates
Behavioral variant correlations: Links to behavioral changes
Language variant associations: Specific patterns in primary progressive aphasia

Other Neurodegenerative Conditions

Huntington's disease: PRDX2 oxidation in striatum
Multiple sclerosis: PRDX2 as a biomarker for disease activity
Friedreich's ataxia: PRDX2 dysfunction due to frataxin deficiency
Multiple System Atrophy: PRDX2 alterations in oligodendrocytes
Progressive Supranuclear Palsy: PRDX2 in tau pathology regions
Frontotemporal Dementia: PRDX2 in frontal and temporal cortex

Ferroptosis and PRDX2

Iron-Dependent Cell Death

Ferroptosis is a recently characterized form of regulated cell death that is distinct from apoptosis and necrosis. It is driven by iron-dependent lipid peroxidation, and PRDX2 plays a critical role in regulating this process in neurons[@nagai2019].

Mechanisms of PRDX2 protection against ferroptosis:

Scavenging lipid hydroperoxides before they accumulate to lethal levels
Protecting cell membranes from iron-catalyzed oxidative damage
Maintaining the balance between pro-oxidant and antioxidant systems

Relevance to neurodegeneration:

Ferroptosis has been implicated in Parkinson's disease dopaminergic neuron loss
Iron accumulation in the substantia nigra is a hallmark of PD
PRDX2 dysfunction may sensitize neurons to ferroptotic cell death

Iron Metabolism and Redox Balance

The intersection of iron metabolism and redox homeostasis makes PRDX2 particularly important:

Iron catalyzes the Fenton reaction, generating hydroxyl radicals
PRDX2 directly reduces lipid peroxides before they react with iron
The thioredoxin-PRDX2 system provides the reducing equivalents needed for this protection

Neuroinflammation and PRDX2

Glial Cell Interactions

PRDX2 is not only important in neurons but also regulates inflammatory responses in glial cells[@kar2018]:

Microglial Function:

PRDX2 modulates microglial activation states
Loss of PRDX2 promotes pro-inflammatory (M1) phenotype
PRDX2 overexpression reduces neurotoxic cytokine release

Astrocyte Support:

Astrocytic PRDX2 supports neuronal antioxidant defense
Glial PRDX2 contributes to the antioxidant shield of the neuropil
Cross-talk between neuronal and glial PRDX2 systems

Inflammatory Signaling Modulation

PRDX2 affects multiple inflammatory pathways:

NF-κB signaling is regulated by the redox state
MAPK pathways are modulated by PRDX2 activity
Inflammasome activation is influenced by cellular peroxide levels

Post-Translational Modifications

Redox-Sensitive Regulation

PRDX2 function is highly regulated by post-translational modifications that sense the cellular redox state[@thomson2015]:

Sulfenylation (SOH):

The peroxidatic cysteine can be oxidized to sulfenic acid
This is the first step in the catalytic cycle
Excessive sulfenylation can lead to inactivation

Sulfination (SO₂H) and Sulfonation (SO₃H):

Hyperoxidation to sulfinic and sulfonic acid forms is largely irreversible
These forms cannot be reduced by the thioredoxin system
Accumulation of hyperoxidized PRDX2 is a marker of oxidative stress

S-Nitrosylation:

NO can modify cysteine residues
S-nitrosylation can inhibit PRDX2 activity
This connects nitrative stress to antioxidant dysfunction

Phosphorylation

PRDX2 activity is modulated by phosphorylation:

Casein kinase 2 (CK2) phosphorylates PRDX2
Tyrosine kinases can modify PRDX2
Phosphorylation affects oligomerization dynamics

Molecular Interactions

Protein-Protein Interactions

PRDX2 interacts with numerous proteins that modulate its function:

| Interactor | Interaction Type | Functional Consequence |
|------------|------------------|------------------------|
| Thioredoxin (Trx) | Substrate provider | Reduces PRDX2 disulfide for regeneration |
| Thioredoxin Reductase (TrxR) | Indirect | Maintains Trx in reduced state |
| ASK1 | Binding partner | Releases upon oxidation to activate JNK pathway |
| JNK | Downstream kinase | Pro-apoptotic signaling when activated |
| p38 MAPK | Interaction | Stress-responsive signaling |
| Vimentin | Binding | Cytoskeletal protection |
| Alpha-synuclein | Colocalization | May seed or inhibit aggregation |
| Amyloid-beta | Interaction | Protection against oxidative damage |
| SOD1 | Co-expression | Synergistic antioxidant defense |

Signaling Pathway Integration

PRDX2 integrates with several critical cellular signaling pathways:

MAPK/ERK Pathway:

Oxidized PRDX2 can influence ERK phosphorylation
Affects cell survival and proliferation decisions
Cross-talk with growth factor signaling

PI3K/Akt Pathway:

PRDX2 activity affects Akt phosphorylation status
Influences cellular survival pathways
Modulates mitochondrial function

NF-κB Pathway:

Redox status influences NF-κB activation
PRDX2 can either promote or inhibit NF-κB depending on context
Affects inflammatory gene expression

Therapeutic Implications

Therapeutic Strategies

1. PRDX2 Overexpression

Viral vector delivery of PRDX2 gene (AAV serotypes)
Small molecule upregulators of PRDX2 expression
Cell-penetrating PRDX2 peptides
Gene therapy approaches for direct CNS delivery

2. Enhancement of PRDX2 Activity

Thioredoxin system enhancers to maintain PRDX2 in reduced state
Small molecules that prevent PRDX2 hyperoxidation
Inhibitors of PRDX2-specific oxidases
Redox buffer compounds

3. Stabilization of PRDX2 Oligomers

Compounds that promote the chaperone-active decameric form
Stabilizers of PRDX2's reduced state
Allosteric modulators of oligomerization

4. Antioxidant Combination Therapies

PRDX2 with other antioxidant enzymes (SOD, catalase)
Combined antioxidant and anti-inflammatory approaches
Mitochondrial-targeted antioxidants

Biomarker Potential

PRDX2 has potential as a biomarker for oxidative stress in neurodegeneration:

Cerebrospinal fluid: PRDX2 levels can be measured in CSF
Blood: Extracellular PRDX2 can serve as a biomarker for oxidative stress
Brain imaging: PET ligands targeting oxidized PRDX2 are under development
Exosomes: PRDX2 in neuronal exosomes as disease marker

Drug Development Targets

PRDX2 agonists: Compounds that upregulate or activate PRDX2
Thioredoxin reductase inhibitors: To maintain thioredoxin in reduced state for PRDX2 regeneration
Peroxynitrite scavengers: To reduce PRDX2 inactivation by peroxynitrite
S-nitrosylation modulators: Control of PRDX2 S-nitrosylation

Clinical Translation Challenges

Blood-brain barrier: Delivery of therapeutic agents to CNS

Target engagement: Verifying PRDX2 modulation in vivo

Biomarker validation: Correlating PRDX2 with clinical outcomes

Dosage optimization: Balancing antioxidant effects

Safety concerns: Potential for interfering with redox signaling

Animal Models

Genetic Models

PRDX2 Knockout Mice:

Viable and fertile with subtle phenotypes
Increased sensitivity to oxidative stress
Accelerated aging phenotype
Accumulation of oxidative damage markers

PRDX2 Transgenic Mice:

Overexpression protects against various stressors
Improved outcomes in MPTP models
Reduced neuroinflammation
Better cognitive performance with age

Toxin Models

PRDX2 modulation affects outcomes in:

MPTP model of Parkinson's disease
6-OHDA lesion model
Amyloid-beta infusion models
Transgenic AD models (APP/PS1, 3xTg-AD)
Rotenone exposure models

Therapeutic Testing

AAV-PRDX2 delivery in toxin models
Small molecule PRDX2 activators
Thioredoxin system enhancers
Combined antioxidant approaches

Research Directions

Current Research Areas

Structural studies: Understanding PRDX2's redox-regulated conformational changes

Post-translational modifications: Phosphorylation, acetylation, and nitrosylation effects

Cell-type specific functions: PRDX2's role in different neuronal subtypes

Protein-protein interactions: Network analysis of PRDX2's interaction partners

Unanswered Questions

How does PRDX2 oxidation specifically contribute to alpha-synuclein aggregation?
What determines which form (peroxidase vs. chaperone) PRDX2 adopts?
Can PRDX2-based therapies be delivered effectively to the brain?
What is the relationship between PRDX2 oxidation and disease progression?
How do different neuronal populations differ in PRDX2 expression?

Emerging Areas

Single-cell analysis: PRDX2 expression across neuronal subtypes
Spatial transcriptomics: Regional vulnerability patterns
Proteomics: Interaction network mapping
Small molecule screening: High-throughput discovery of PRDX2 modulators

Interactive Elements

Pathway Diagram

Mermaid diagram (expand to render)

Summary Table

| Feature | Normal Neuron | Neurodegeneration |
|---------|---------------|-------------------|
| PRDX2 oxidation | Low | High |
| Oligomerization | Transient | Sustained |
| Chaperone activity | inducible | overwhelmed |
| Thioredoxin system | functional | compromised |
| Cell survival | maintained | impaired |

Clinical Perspectives

Diagnostic Applications

PRDX2 measurement offers valuable insights into neurodegenerative disease diagnostics:

Cerebrospinal Fluid (CSF) Analysis:

PRDX2 levels elevated in PD and AD patients
Correlation with disease severity and progression
Potential for differential diagnosis
Combination with other biomarkers

Blood-Based Biomarkers:

Peripheral blood mononuclear cell (PBMC) PRDX2
Serum PRDX2 as oxidative stress marker
Exosome-associated PRDX2
Longitudinal monitoring potential

Imaging Correlations:

MRI-based oxidative stress markers
PET tracer development for oxidized proteins
Correlation with regional atrophy patterns

Therapeutic Monitoring

PRDX2 as a therapeutic target requires monitoring:

Target Engagement:

Measuring PRDX2 oxidation status
Tracking oligomerization changes
Assessing chaperone activity
Evaluating thioredoxin system function

Clinical Endpoints:

Cognitive function assessments
Motor function evaluations
Quality of life measures
Biomarker correlations

Comparative Biology

Evolutionary Conservation

PRDX2 is highly conserved across species:

| Species | Sequence Identity | Functional Conservation |
|---------|-------------------|-------------------------|
| Human | 100% | Complete |
| Mouse | 98% | Full function |
| Zebrafish | 85% | High conservation |
| Drosophila | 72% | Partial function |
| C. elegans | 65% | Peroxidase activity |

Species-Specific Studies

Rodent Models:

Mouse models show age-related PRDX2 changes
Rat primary neuron cultures
Behavioral correlates of PRDX2 status

Lower Organisms:

Drosophila melanogaster studies
Zebrafish neuronal development
C. elegans oxidative stress response

Background

The study of Prdx2 — Peroxiredoxin 2 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. The dual functionality of PRDX2 as both peroxidase and molecular chaperone makes it uniquely positioned to protect neurons from the combined challenges of oxidative stress and protein aggregation that characterize neurodegenerative diseases.

External Links

[NCBI Gene: PRDX2](https://www.ncbi.nlm.nih.gov/gene/7003)
[UniProt: PRDX2](https://www.uniprot.org/uniprot/P32189)
[Ensembl: PRDX2](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000167612)
[OMIM: PRDX2](https://omim.org/entry/607386)

References

[Lee et al., Peroxiredoxin function in oxidative stress response and signaling (2011)](https://pubmed.ncbi.nlm.nih.gov/20812876/)

[Tasset et al., Redox imbalance in neurodegenerative diseases (2012)](https://pubmed.ncbi.nlm.nih.gov/22324453/)

[Klammer et al., Structural and functional analysis of peroxiredoxin 2 (2020)](https://pubmed.ncbi.nlm.nih.gov/32871324/)

[Kim et al., Peroxiredoxin family in cellular antioxidant defense (2008)](https://pubmed.ncbi.nlm.nih.gov/18687751/)

[Riso et al., Oxidative stress triggers peroxiredoxin oligomerization (2009)](https://pubmed.ncbi.nlm.nih.gov/19496350/)

[Wang et al., Crystal structure of human peroxiredoxin 2 (2014)](https://pubmed.ncbi.nlm.nih.gov/25146837/)

[Yang et al., Catalytic mechanism of 2-Cys peroxiredoxins (2009)](https://pubmed.ncbi.nlm.nih.gov/19318436/)

[Hu et al., Peroxiredoxin 2 oligomerization and chaperone function (2009)](https://pubmed.ncbi.nlm.nih.gov/19240134/)

[Mann et al., Peroxiredoxin 2 in neuronal antioxidant defense (2006)](https://pubmed.ncbi.nlm.nih.gov/16507885/)

[Fujii et al., Peroxiredoxin as molecular chaperone under oxidative stress (2010)](https://pubmed.ncbi.nlm.nih.gov/20053993/)

[Yang et al., Regulation of apoptosis by peroxiredoxin 2 (2007)](https://pubmed.ncbi.nlm.nih.gov/17213082/)

[Eng et al., Peroxiredoxin 2 protects dopaminergic neurons from oxidative stress (2015)](https://pubmed.ncbi.nlm.nih.gov/25664856/)

[Ng et al., Mitochondrial peroxiredoxin 2 function (2016)](https://pubmed.ncbi.nlm.nih.gov/26922875/)

[Perez et al., Peroxiredoxin 2 oxidation in Parkinson's disease substantia nigra (2018)](https://pubmed.ncbi.nlm.nih.gov/29953882/)

[Kim et al., Peroxiredoxin 2 in Alzheimer's disease pathogenesis (2019)](https://pubmed.ncbi.nlm.nih.gov/30659468/)

[Yang et al., Peroxiredoxin 2 in amyotrophic lateral sclerosis (2020)](https://pubmed.ncbi.nlm.nih.gov/32042189/)

[Chen et al., Peroxiredoxin 2 neuroprotection in cerebral ischemia (2019)](https://pubmed.ncbi.nlm.nih.gov/31028727/)

[Liu et al., Peroxiredoxin 2 and alpha-synuclein aggregation (2018)](https://pubmed.ncbi.nlm.nih.gov/29505921/)

[Zhang et al., Thioredoxin-peroxiredoxin system in neurodegeneration (2017)](https://pubmed.ncbi.nlm.nih.gov/28548096/)

[Ahmad et al., Peroxiredoxin as therapeutic target in neurodegeneration (2013)](https://pubmed.ncbi.nlm.nih.gov/24095595/)

[Nagai et al., Peroxiredoxin 2 regulates ferroptosis in dopaminergic neurons (2019)](https://pubmed.ncbi.nlm.nih.gov/31197176/)

[Kar et al., Peroxiredoxin 2 and neuroinflammation in Parkinson's disease (2018)](https://pubmed.ncbi.nlm.nih.gov/29654658/)

[Ma et al., Peroxiredoxin 2 post-translational modifications in aging brain (2019)](https://pubmed.ncbi.nlm.nih.gov/31124297/)

[Thomson et al., Regulation of peroxiredoxin by reversible oxidation (2015)](https://pubmed.ncbi.nlm.nih.gov/25866810/)

Pathway Diagram

The following diagram shows the key molecular relationships involving PRDX2 — Peroxiredoxin 2 discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

PRDX2

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📊 Evidence Profile

Evidence Balance

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Certainty

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Debates

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Incoming

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Outgoing

17

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

PRDX2 — Peroxiredoxin 2

PRDX2 — Peroxiredoxin 2

Introduction

PRDX2 — Peroxiredoxin 2

Introduction

Overview

Structure and Biochemistry

Molecular Architecture

Catalytic Mechanism

Oligomerization and Chaperone Activity

Function

Antioxidant Defense

Molecular Chaperone Function

Regulation of Cell Death Pathways

Expression and Localization

Tissue Distribution

Subcellular Localization

Disease Associations

Parkinson's Disease

Alzheimer's Disease

Amyotrophic Lateral Sclerosis (ALS)

Stroke and Ischemic Injury

Multiple System Atrophy (MSA)

Progressive Supranuclear Palsy (PSP)

Frontotemporal Dementia (FTD)

Other Neurodegenerative Conditions

Ferroptosis and PRDX2

Iron-Dependent Cell Death

Iron Metabolism and Redox Balance

Neuroinflammation and PRDX2

Glial Cell Interactions

Inflammatory Signaling Modulation

Post-Translational Modifications

Redox-Sensitive Regulation

Phosphorylation

Molecular Interactions

Protein-Protein Interactions

Signaling Pathway Integration

Therapeutic Implications

Therapeutic Strategies

Biomarker Potential

Drug Development Targets

Clinical Translation Challenges

Animal Models

Genetic Models

Toxin Models

Therapeutic Testing

Research Directions

Current Research Areas

Unanswered Questions

Emerging Areas

Interactive Elements

Pathway Diagram

Summary Table

Clinical Perspectives

Diagnostic Applications

Therapeutic Monitoring

Comparative Biology

Evolutionary Conservation

Species-Specific Studies

Background

See Also

External Links

References

Pathway Diagram

💬 Discussion