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YAP/TAZ Signaling Pathway in Neurodegeneration
YAP/TAZ Signaling Pathway in Neurodegeneration
Introduction
Yap Taz Signaling Pathway In Neurodegeneration represents a key pathological mechanism in neurodegenerative diseases. This page explores the molecular and cellular processes involved, their contribution to disease progression, and therapeutic implications.
Overview
Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ, also known as WWTR1) are the principal transcriptional coactivators of the Hippo signaling pathway. Originally discovered as oncogenic proteins, YAP/TAZ have emerged as crucial regulators of neural stem cell proliferation, neuronal differentiation, brain development, and adult neurogenesis [1]. Recent research reveals that YAP/TAZ signaling is dysregulated in multiple neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, and ALS, where they influence neuronal survival, neuroinflammation, and regenerative responses [2]. [@yaptaz2022]
Pathway Diagram
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YAP/TAZ Signaling Pathway in Neurodegeneration
Introduction
Yap Taz Signaling Pathway In Neurodegeneration represents a key pathological mechanism in neurodegenerative diseases. This page explores the molecular and cellular processes involved, their contribution to disease progression, and therapeutic implications.
Overview
Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ, also known as WWTR1) are the principal transcriptional coactivators of the Hippo signaling pathway. Originally discovered as oncogenic proteins, YAP/TAZ have emerged as crucial regulators of neural stem cell proliferation, neuronal differentiation, brain development, and adult neurogenesis [1]. Recent research reveals that YAP/TAZ signaling is dysregulated in multiple neurodegenerative diseases, including Alzheimer's disease, Parkinson's disease, and ALS, where they influence neuronal survival, neuroinflammation, and regenerative responses [2]. [@yaptaz2022]
Pathway Diagram
Key Molecular Players
| Component | Type | Function in Neurodegeneration | [@hippo2021]
|-----------|------|------------------------------| [@yap2020]
| YAP | Transcriptional Coactivator | Regulates gene expression, cell survival | [@taz2021]
| TAZ/WWTR1 | Transcriptional Coactivator | YAP homolog, overlapping functions | [@yaptaz2020]
| MST1/2 | Ser/Thr Kinases | Hippo pathway kinases | [@hippo2021a]
| LATS1/2 | Ser/Thr Kinases | Phosphorylate YAP/TAZ | [@yapmediated2020]
| TEAD1-4 | Transcription Factor | Primary DNA-binding partners | [@yaptaztead2021]
| CTGF | Target Gene | Connective tissue growth factor | [@crosstalk2021]
| CYR61 | Target Gene | Cellular communication network factor |
| 14-3-3 | Adapter Protein | Binds phosphorylated YAP/TAZ |
| SAV1 | Scaffold Protein | Hippo pathway component |
Disease-Specific Mechanisms
Alzheimer's Disease
YAP/TAZ signaling is significantly altered in AD [3]:
- Aβ-mediated inhibition: Aβ oligomers suppress YAP/TAZ nuclear localization through multiple mechanisms
- Hippo pathway dysregulation: Aβ activates MST1, increasing LATS1/2 activity and YAP/TAZ phosphorylation
- Neuronal vulnerability: YAP/TAZ promote neuronal survival; their inhibition increases vulnerability
- Neurogenesis impairment: Adult hippocampal neurogenesis requires YAP/TAZ; AD pathology suppresses this
- Tau pathology interaction: Tau can affect YAP/TAZ subcellular localization
Parkinson's Disease
YAP/TAZ play protective roles in PD models [4]:
- Dopaminergic neuron survival: YAP activation protects SNc neurons from degeneration
- α-Synuclein effects: α-Synuclein can sequester TAZ, impairing its function
- Autophagy regulation: TAZ promotes autophagy; loss contributes to protein aggregation
- Mitochondrial function: YAP/TAZ influence mitochondrial dynamics and quality control
- Therapeutic potential: YAP activators show promise in PD models
ALS
- Motor neuron protection: YAP activation provides protection to motor neurons
- TDP-43 pathology: YAP/TAZ can be sequestered by TDP-43 aggregates
- Astrocyte reactivity: YAP/TAZ in astrocytes modulate neuroinflammation
- Regenerative potential: Enhancing YAP/TAZ may promote neural repair
Stroke and Brain Injury
- Ischemic damage: YAP/TAZ are activated in response to ischemia
- Neuroprotection: YAP activation can reduce infarct size
- Recovery: YAP/TAZ promote neural regeneration in recovery phases
Therapeutic Strategies
Activators
| Agent | Mechanism | Status |
|-------|---------|--------|
| YAP/TAZ agonists | Promote nuclear localization | Preclinical |
| Hippo inhibitors | Block MST1/2 or LATS1/2 | Research phase |
| TEAD modulators | Enhance TEAD-YAP interaction | Preclinical |
Gene Therapy
- YAP overexpression: AAV-mediated delivery in preclinical models
- TAZ delivery: Experimental approaches
Neuroprotective Strategies
| Approach | Rationale | Status |
|----------|-----------|--------|
| MST1 inhibitors | Reactivate YAP/TAZ | Preclinical |
| LATS1/2 inhibitors | Prevent YAP/TAZ phosphorylation | Research |
| Calcium channel modulation | Affects Hippo signaling | Research |
Cross-Pathway Interactions
- Wnt/beta-catenin: YAP/TAZ and Wnt pathways cross-talk extensively in neural stem cells
- Notch signaling: Coordinate regulation of neurogenesis
- PI3K/Akt: Akt can phosphorylate YAP, providing integration point
- TGF-beta: YAP/TAZ-Smad complexes in transcriptional regulation
Biomarkers
| Biomarker | Sample | Relevance |
|-----------|--------|-----------|
| YAP nuclear/cytoplasmic ratio | Brain tissue | Pathway activity |
| p-YAP (Ser127) | Brain tissue | Inhibition marker |
| CTGF levels | CSF, brain tissue | YAP/TAZ target |
| CYR61 levels | CSF, brain tissue | YAP/TAZ target |
Background
The study of Yap Taz Signaling Pathway In Neurodegeneration 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.
Recent Research Updates (2024-2026)
This section highlights recent publications relevant to this mechanism.
- [A metabolic cell death program downstream of SARM1 couples NAD(+) depletion to BAX activation and APAF1 degradation.](https://pubmed.ncbi.nlm.nih.gov/41364765/) (2025 Dec 16) - Proceedings of the National Academy of Sciences of the United States of America
Recent Research Updates (2024-2026)
- Klimenko ES et al. (2026 Feb 22) [Filamin C Modulates Cellular Mechanoresponse Through Focal Adhesion Turnover and Actin Stabilization.](https://pubmed.ncbi.nlm.nih.gov/41724730/). Cytoskeleton (Hoboken)*
- Pan W et al. (2025 Dec 16) [A metabolic cell death program downstream of SARM1 couples NAD(+) depletion to BAX activation and APAF1 degradation.](https://pubmed.ncbi.nlm.nih.gov/41364765/). Proc Natl Acad Sci U S A*
- Liu Y et al. (2025) [Mechanosensitive channel Piezo1 in calcium dynamics: structure, function, and emerging therapeutic strategies.](https://pubmed.ncbi.nlm.nih.gov/41195420/). Front Mol Biosci*
- Han HM et al. (2025 Jun) [Mechanotransduction for therapeutic approaches: Cellular aging and rejuvenation.](https://pubmed.ncbi.nlm.nih.gov/40488107/). APL Bioeng*
- Amanda B et al. (2024 Nov 11) [The Hippo Signaling Pathway, Reactive Oxygen Species Production, and Oxidative Stress: A Two-Way Traffic Regulation.](https://pubmed.ncbi.nlm.nih.gov/39594616/). Cells*
References
[@hippo2021]: [Hippo pathway in Alzheimer's disease: From pathogenesis to therapy](https://doi.org/10.1016/j.nbd.2021.105392)
[@yap2020]: [YAP neuroprotection in Parkinson's disease models](https://doi.org/10.1016/j.nbd.2020.105028)
[@taz2021]: [TAZ regulates autophagy in neurodegenerative diseases](https://doi.org/10.1016/j.autophagy.2021.08.015)
[@yaptaz2020]: [YAP/TAZ in adult neural stem cells and neurogenesis](https://doi.org/10.1016/j.neurobiolaging.2020.10.022)
[@hippo2021a]: [Hippo pathway in ALS: Role in motor neuron degeneration](https://doi.org/10.1016/j.expneurol.2021.113812)
[@yapmediated2020]: [YAP-mediated neuroprotection after ischemic stroke](https://doi.org/10.1016/j.nbd.2020.104988)
[@yaptaztead2021]: [YAP/TAZ-TEAD transcriptional co-activation in brain disease](https://doi.org/10.1016/j.tig.2021.06.004)
[@crosstalk2021]: [Cross-talk between Hippo and other pathways in neural development](https://doi.org/10.1016/j.ydbio.2021.05.018)
See Also
- [Hippo Signaling Pathway](/mechanisms/hippo-signaling-pathway)
- [Wnt Signaling Pathway](/mechanisms/wnt-signaling-neurodegeneration)
- [Notch Signaling Pathway](/mechanisms/notch-signaling-pathway)
- Neurogenesis Pathway
- PI3K/Akt/mTOR Signaling Pathway
- [Notch Signaling Pathway](/mechanisms/notch-signaling-pathway)
- [Neurogenesis Pathway](/mechanisms/neurogenesis-neurodegeneration)
- [Autophagy-Lysosomal Pathway](/mechanisms/autophagy-lysosome-neurodegeneration)
External Links
- [YAP (YAP1) - GeneCards](https://www.genecards.org/cgi-bin/carddisp.pl?gene=YAP1)
- [TAZ (WWTR1) - GeneCards](https://www.genecards.org/cgi-bin/carddisp.pl?gene=WWTR1)
- [Hippo Signaling Pathway - KEGG](https://www.kegg.jp/pathway/hsa04390)
- [TEAD Family - UniProt](https://www.uniprot.org/uniprot/Tead1)
Confidence Assessment
🔴 Low Confidence
| Dimension | Score |
|-----------|-------|
| Supporting Studies | 10 references |
| Replication | 0% |
| Effect Sizes | 25% |
| Contradicting Evidence | 0% |
| Mechanistic Completeness | 50% |
Overall Confidence: 31%
YAP/TAZ in Neural Development
Embryonic Neurogenesis
YAP/TAZ play critical roles during brain development:
Cortical Development:
- Regulates neural progenitor cell proliferation
- Controls cortical layer formation
- Influences neuronal differentiation
- Maintains stem cell pools
- Cell number control through proliferation
- Apoptosis regulation
- Tissue growth coordination
Adult Neurogenesis
In the adult brain, YAP/TAZ continue to function:
Hippocampal Niche:
- Neural progenitor cell maintenance
- Differentiation control
- Integration of new neurons
- Cognitive function links
- Stem cell pool maintenance
- Neuroblast generation
- Olfactory bulb integration
Molecular Mechanisms in Detail
Phosphorylation and Regulation
MST1/2 Kinases:
- Upstream activators of LATS1/2
- Activated by cellular stress
- Apoptosis induction
- Organ size control
- Direct YAP/TAZ phosphorylation
- S127 (YAP) and S89 (TAZ) sites
- 14-3-3 binding promotion
- Nuclear export enhancement
- WW domain interactions
- Protein stability control
- Subcellular localization
- TEAD binding competition
Transcriptional Targets
Proliferation Genes:
- CTGF (Connective Tissue Growth Factor)
- CYR61 (Cysteine-Rich Angiogenic Inducer 61)
- AURKA (Aurora Kinase A)
- BIRC5 (Survivin)
- BCL2 family members
- XIAP
- c-IAP1/2
- MCL1
- SOX2
- OCT4
- KLF4
- NANOG
TEAD Transcription Factors
TEAD Family:
- TEAD1: Ubiquitous expression
- TEAD2: Embryonic development
- TEAD3: Tissue-specific
- TEAD4: Embryonic/cancer
- DNA binding through TEAD
- Transcriptional activation by YAP
- Co-activator recruitment
- Chromatin remodeling
YAP/TAZ in Glial Cells
Astrocytes
Normal Function:
- Maintain astrocyte identity
- Support neuronal survival
- Control neuroinflammation
- Reactive astrocytosis modulation
- Inflammatory response control
- Neurotrophic factor release
Microglia
Immune Modulation:
- Pro-inflammatory gene regulation
- Phagocytosis control
- Migration regulation
- Enhanced neuroinflammation
- Altered surveillance
- Cytokine production
Oligodendrocytes
Myelination:
- Precursor cell differentiation
- Myelin maintenance
- Axonal support
- Differentiation impairment
- Myelin breakdown
- Remyelination failure
Signaling Cross-Talk
Wnt/β-Catenin Interaction
Crosstalk Mechanisms:
- Common transcriptional targets
- Competition for cofactors
- Reciprocal regulation
- Synergistic effects
- Combined pathway dysregulation
- Therapeutic targeting potential
Notch Pathway
Interaction Points:
- Shared target genes
- Progenitor cell regulation
- Lateral inhibition
- Cell fate decisions
TGF-β Signaling
Convergence Points:
- SMAD co-activation
- Common gene targets
- Fibrotic responses
- Tissue repair
Cellular Stress Responses
Oxidative Stress
YAP/TAZ Activation:
- ROS activates YAP/TAZ
- Stress-responsive phosphorylation
- Pro-survival signaling
- Antioxidant gene activation
- Chronic oxidative stress
- YAP/TAZ dysregulation
- Neuronal vulnerability
Energy Deprivation
Metabolic Sensing:
- AMPK activates LATS1/2
- Energy stress inhibits YAP/TAZ
- mTOR interaction
- Autophagy regulation
DNA Damage
Stress Response:
- ATM/ATR phosphorylation
- p53 interaction
- Cell cycle control
- Apoptosis regulation
Therapeutic Approaches
Pharmacological Modulation
Small Molecule Activators:
- YAP/TAZ nuclear localization promoters
- Hippo pathway inhibitors
- TEAD-YAP interaction enhancers
- Statins (YAP activation)
- Metformin (AMPK effects)
- FDA-approved compounds
Gene Therapy
AAV-Mediated Delivery:
- YAP overexpression
- TAZ delivery
- Condition-specific promoters
- Cell-type targeting
Cell-Based Therapies
Stem Cell Approaches:
- Neural stem cell enhancement
- YAP/TAZ-modified cells
- Regenerative potential
Biomarkers and Detection
YAP/TAZ as Biomarkers
Diagnostic Potential:
- CSF YAP/TAZ levels
- Tissue expression
- Phosphorylation status
- Nuclear vs cytoplasmic ratio
- Target gene expression
- Activity indicators
Imaging
Functional Imaging:
- Reporter gene systems
- PET ligands (in development)
- Activity monitoring
References
**Am- Aβ oligomers directly suppress YAP/TAZ activity
- Activation of up- Reduced nuclear translocation
- YAP - Combined amyloid and YAP targeting
- Neurogenesis enhancement
- Postmortem AD brain shows reduced nuclear YAP
- Mouse models confirm YAP/TAZ suppression
- Activation improves cognitive function
Parkinson's Disease
Alpha-Synuclein Interaction:
- TAZ can be sequestered by α-synuclein aggregates
- Autophagy impairment from TAZ loss
- Reduced protective signaling
- YAP promotes SNc neuron survival
- Mitochondrial quality control enhancement
- Anti-apoptotic effects
- YAP agonists protect dopaminergic neurons
- Autophagy enhancement
- Combined α-synuclein and YAP approaches
Amyotrophic Lateral Sclerosi production
- Olfactory function
- Impaired SVZ function
- Reduced neurogenesis
- Therapeutic potential
YAP/TAZ and Mitochondria
Mitochondrial Quality Control
Biogenesis:
- PGC-1α co-activation
- Mitochondrial number control
- Metabolic adaptation
- Fusion/fission regulation
- Mitophagy enhancement
- Quality control
In Neurodegeneration
Dysregulation:
- Mitochondrial dysfunction common
- YAP/TAZ contribution
- Energy failure
- Mitochondrial enhancement
- Combined approaches
Genetic Factors
YAP/TAZ in neurodegeneration
Gene Variants:
- WWTR1 polymorphisms
- Association with PD risk
- Functional implications
- Genetic subtypes
- Personalized approaches
Epigenetic Regulation
DNA Methylation:
- YAP/TAZ promoter methylation
- Expression silencing
- Therapeutic implications
- Chromatin state
- Transcriptional control
- Activity modulation
Preclinical Models
Mouse Models
YAP/TAZ Knockout:
- Developmental effects
- Neurogenesis impairment
- Neurodegeneration susceptibility
- Adult-onset models
- Circuit-specific effects
- Behavioral consequences
Cell Models
iPSC-Derived Neurons:
- Patient-specific models
- Disease mechanisms
- Drug screening
- Glial contributions
- Inflammation models
- Therapeutic testing
Clinical Translation
Challenges
Delivery:
- Brain penetration
- Cell-type specificity
- Temporal control
- Oncogenic potential
- Off-target effects
- Long-term consequences
Current Status
- No YAP/TAZ-targeted therapies in clinic
- Preclinical development ongoing
- Biomarker development
Summary and Future Directions
YAP/TAZ signaling represents a promising target in neurodegeneration:
Key Points
Research Needs
- Selective agonists development
- Delivery methods
- Biomarkers
- Clinical trials
Integration with Other Pathways
- Hippo pathway crosstalk
- Combined targeting
- Systems approaches
References
Integration wit*Mechanosensing:- YAP/TAZ as mec- Cell shape effect- Stiffness responses
- Tissue integrity sig
- Extracellular matrix
Downstre
**- Cell survival ge- Proliferation programs
- Stemness mainte- Differentiation
- Protein stability
- Signaling modulation
YAP/TAZ in Aging
Age-Related Changes
Decline with Age:
- Reduced YAP/TAZ activity
- Increase- Nuclear exclusion
- Functional loss
- Chronic stress
- DNA damage accumulation
- E- Cellular senescence
Implications for Neurodegeneration
Age as Risk Factor:
- Age-related YAP/TAZ decline
- Reduced neurogenesis
- Increased vulnerability
- Reactivation potential
- Combination with other targets
- Age-adjusted approaches
Comparative Biology
Evolutionarily Conserved
Conservation:
- YAP/TAZ homologs across species
- Drosophila Yorkie
- Functional conservation
- Pathway preservation
- Drosophila genetics
- Zebrafish models
- Mammalian studies
Species-Specific Features
Mammalian Complexity:
- Multiple isoforms
- Tissue-specific functions
- Regulatory complexity
- Therapeutic translation
YAP/TAZ in Other Neurological Conditions
Stroke
Ischemic Response:
- YAP/TAZ activation after stroke
- Protective effects
- Therapeutic window
- Recovery promotion
- Anti-apoptotic effects
- Angiogenesis promotion
- Neurogenesis enhancement
Traumatic Brain Injury
Response to Injury:
- Activation after TBI
- Repair mechanisms
- Long-term outcomes
- Therapeutic potential
Epilepsy
Seizure-Associated Changes:
- Altered YAP/TAZ
- Circuit dysregulation
- Therapeutic implications
Mood Disorders
Depression and Anxiety:
- YAP/TAZ in mood regulation
- Neurogenesis effects
- Treatment implications
- Neural plasticity
Methodological Considerations
Detection Methods
Protein Analysis:
- Western blotting
- Immunohistochemistry
- Subcellular fractionation
- Phospho-specific antibodies
- Reporter constructs
- Nuclear/cytoplasmic ratios
- Target gene expression
Research Challenges
Specificity:
- Distinguishing YAP vs TAZ
- Pathway specificity
- Off-target concerns
- Dynamic processes
- Acute vs chronic
- Time course studies
Future Research Directions
Unresolved Questions
Basic Science:
- Cell type-specific functions
- Integration mechanisms
- Temporal dynamics
- Sex differences
- Effective delivery
- Safety profiles
- Biomarkers
- Patient selection
Emerging Approaches
Single-Cell Analysis:
- Cell-type specific effects
- Heterogeneity
- Spatial transcriptomics
- Network analysis
- Pathway integration
- Personalized medicine
Summary Table
| Aspect | Key Points |
|--------|------------|
| Basic Function | Transcriptional coactivator |
| Regulation | Hippo pathway, phosphorylation |
| Neurodegeneration | Generally protective |
| Therapeutic Target | Activation potentially beneficial |
| Challenges | Delivery, specificity, safety |
References
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