CBS/PSP Genetic Architecture

mechanism · SciDEX wiki

Overview

The genetic architecture of corticobasal syndrome (CBS) and progressive supranuclear palsy (PSP) reveals a complex landscape of risk alleles, with PSP being one of the most genetically tractable neurodegenerative disorders. Both conditions are classified as 4R tauopathies, sharing pathological features of tau filament accumulation, but they demonstrate distinct clinical phenotypes and genetic risk profiles. 1MAPT H1 haplotype and PSP risk (2008)2008 · PMID 18627048Open reference

This page compiles the current understanding of genetic risk factors for CBS and PSP, including genome-wide association study (GWAS) findings, candidate gene associations, and functional genomics insights that illuminate disease mechanisms. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference

Genetic Risk Factor Pathways

flowchart TD
    subgraph MAPT_H1
        A["MAPT H1 Haplotype"] --> B["4R Tau Overproduction"]
        B --> C["Altered Tau Splicing"]
    end
    
    subgraph S["TX6"]
        D["STX6 Risk Variant"] --> E["Vesicle Trafficking Defect"]
        E --> F["Synaptic Dysfunction"]
    end
    
    subgraph M["OBP"]
        G["MOBP Risk Variant"] --> H["Myelin Instability"]
        H --> I["Axonal Vulnerability"]
    end
    
    subgraph E["IF2AK3"]
        J["EIF2AK3 Risk Variant"] --> K["ER Stress Response"]
        K --> L["Unfolded Protein Response"]
        L --> M["Apoptotic Signaling"]
    end
    
    C --> N["4R Tauopathy"]
    F --> N
    I --> N
    M --> N
    
    N --> O["PSP Pathology"]
    N --> P["CBD Pathology"]
    
    style A fill:#1a0a1f,stroke:#333
    style D fill:#1a0a1f,stroke:#333
    style G fill:#1a0a1f,stroke:#333
    style J fill:#1a0a1f,stroke:#333
    style O fill:#9f9,stroke:#333
    style P fill:#9f9,stroke:#333

Risk Gene Interaction Network

flowchart LR
    A["MAPT H1"] --> B["4R Tau Overexpression"]
    C["STX6"] --> D["Vesicle Trafficking Defect"]
    E["MOBP"] --> F["Myelin Instability"]
    G["EIF2AK3"] --> H["ER Stress / UPR"]
    I["TRIM11"] --> J["Impaired Protein Degradation"]
    K["DUSP10"] --> L["MAPK Dysregulation"]
    B --> M["4R Tauopathy"]
    D --> M
    F --> M
    H --> M
    J --> M
    L --> M
    M --> N["PSP / CBD"]

The MAPT Locus: The Strongest Genetic Risk Factor

H1 Haplotype Association

The microtubule-associated protein tau gene (MAPT) on chromosome 17q21.31 represents the strongest and most consistent genetic risk factor for PSP. The H1 haplotype, comprising a ~500 kb inversion polymorphism, demonstrates a remarkably strong association with PSP risk. 3International PSP Genetics Consortium, PSP GWAS meta-analysis (2019)2019 · PMID 31105264Open reference

Key Findings: 4Novel PSP risk loci (2018)2018 · PMID 29666634Open reference

  • H1 vs H2 frequency: PSP cases show H1 haplotype frequency >95% compared to ~78% in controls

  • Odds ratio: H1 homozygosity confers OR ~5.5-8.0 for PSP risk (1)

  • H1c subhaplotype: The H1c subhaplotype specifically associates with PSP, particularly with the Richardson’s syndrome subtype (2)

The H1 haplotype encompasses multiple polymorphisms that influence MAPT expression and splicing. These variants affect: 5STX6 and MOBP in PSP (2015)2015 · PMID 25663141Open reference

  • Tau isoform expression: H1 haplotype is associated with increased 4R tau expression

  • Promoter activity: H1-specific SNPs increase transcriptional activity

  • Splicing regulation: H1 variants alter exon 10 splicing, favoring 4R tau inclusion

Functional Consequences of MAPT Variants

| Variant | Population Frequency (PSP) | Odds Ratio | Functional Effect | 6Identification of new PSP risk genes (2011)2011 · PMID 21325637Open reference |---------|---------------------------|------------|-------------------| 7Tau pathology in CBS (2006)2006 · PMID 16682105Open reference | H1 haplotype (homozygous) | ~95% | 5.5-8.0 | Increased 4R tau expression | 8GRN mutations causing CBS (2009)2009 · PMID 19191326Open reference | H1c subhaplotype | ~25% | 2.1 | Enhanced exon 10 inclusion | 9C9orf72 expansions in CBS (2014)2014 · PMID 24606701Open reference | A allele of rs242557 | ~80% | 1.8 | Increased MAPT transcription | 10Neuropathology of PSP (2010)2010 · PMID 20157239Open reference

MAPT Mutations in CBS

While sporadic CBS shows modest MAPT associations, pathogenic MAPT mutations can cause familial CBS phenotypes: 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference0

  • P301L: Classic FTDP-17 mutation, can present as CBS (11)

  • N279K: Exon 10 splicing mutation causing 4R tau increase

  • G389R: CBD-like phenotype with predominant cortical involvement

  • R406W: Can present with CBS features including asymmetric rigidity

Genome-Wide Significant Loci in PSP

Major GWAS Findings

Large-scale GWAS meta-analyses have identified multiple genome-wide significant loci beyond MAPT (3)(4). The International PSP Genetics Consortium has defined the following as definitive PSP risk genes: 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference1

STX6 (Syntaxin 6)

Located at 1q24.2, STX6 encodes a SNARE protein involved in intracellular vesicle trafficking. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference2

  • Lead SNP: rs1411478

  • Odds ratio: 1.29 per risk allele (p = 2.4 × 10⁻¹²)

  • Functional relevance: Altered endosomal trafficking and autophagy dysfunction

  • Pathway involvement: Membrane trafficking, autophagosome-lysosome fusion

  • Expression QTL: Risk allele associated with reduced STX6 expression in brain tissue (12)

MOBP (Myelin-Associated Oligodendrocyte Basic Protein)

Located at 3p22.2, MOBP is expressed in oligodendrocytes. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference3

  • Lead SNP: rs1768208

  • Odds ratio: 1.25 per risk allele (p = 3.0 × 10⁻¹⁰)

  • Functional relevance: Myelin integrity and oligodendrocyte function

  • Pathway involvement: White matter integrity, myelin maintenance

  • Expression: Highly expressed in white matter tracts affected in PSP

EIF2AK3 (PKR-like Endoplasmic Reticulum Kinase)

Located at 2p22.2, EIF2AK3 encodes PERK, a key sensor of endoplasmic reticulum stress. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference4

  • Lead SNP: rs7571971

  • Odds ratio: 1.23 per risk allele (p = 4.8 × 10⁻⁹)

  • Functional relevance: Unfolded protein response (UPR) dysregulation

  • Pathway involvement: ER stress response, autophagy, tau phosphorylation

  • PERK pathway: Chronic activation leads to translational repression and apoptosis (13)

SLCO1A2 (Solute Carrier Organic Anion Transporter 1A2)

Located at 12p12.1, SLCO1A2 encodes an organic anion transporter involved in drug uptake. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference5

  • Lead SNP: rs2075650

  • Odds ratio: 1.22 per risk allele

  • Functional relevance: May affect tau propagation between cells

  • Pathway involvement: Cellular export/import of molecules

  • Blood-brain barrier: Expressed at BBB, may transport tau species

DUSP10 (Dual Specificity Phosphatase 10)

Located at 1q41, DUSP10 encodes a MAPK phosphatase that regulates stress-activated protein kinases. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference6

  • Lead SNP: rs6692995

  • Odds ratio: 1.18 per risk allele

  • Functional relevance: MAPK signaling dysregulation, altered stress response

  • Pathway involvement: JNK/p38 MAPK signaling, tau phosphorylation

  • Stress response: Key regulator of cellular stress pathways

TRIM11 (Tripartite Motif-Containing Protein 11)

Located at 7q22.1, TRIM11 is involved in protein quality control. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference7

  • Lead SNP: rs9637318

  • Odds ratio: 1.15 per risk allele

  • Functional relevance: Impaired protein degradation pathways

  • Pathway involvement: Ubiquitin-proteasome system, autophagy

  • Tau degradation: Can ubiquitinate mutant tau for proteasomal degradation (14)

Recently Identified PSP Risk Loci

Recent meta-analyses have identified additional risk loci (15): 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference8

RUNX2 (Runt-Related Transcription Factor 2)

  • Chromosome: 6q21

  • Odds ratio: 1.14 per risk allele

  • Function: Transcription factor involved in bone development and cell differentiation

  • Brain expression: Expressed in neurons, potential role in neurodegeneration

BNIP3 (BCL2 Interacting Protein 3)

  • Chromosome: 10q26.3

  • Odds ratio: 1.12 per risk allele

  • Function: Mitophagy receptor

  • Pathway: Mitochondrial quality control, apoptosis regulation

Summary of Major GWAS Loci

Corticobasal Syndrome Genetics

Overview

CBS demonstrates greater genetic heterogeneity than PSP, with multiple causative and risk genes identified. The genetics of CBS overlaps substantially with frontotemporal dementia (FTD) and progressive aphasia syndromes. Unlike PSP, which shows strong MAPT associations, CBS shows more diverse genetic causation. 2H1c subhaplotype in PSP (2005)2005 · PMID 15809343Open reference9

Causative Genes for CBS

LRRK2 (Leucine-Rich Repeat Kinase 2)

LRRK2 mutations are a cause of familial Parkinson’s disease and can present with CBS phenotypes. 3International PSP Genetics Consortium, PSP GWAS meta-analysis (2019)2019 · PMID 31105264Open reference0

  • G2019S: Most common LRRK2 mutation, occasionally associated with CBS (16)

  • R1441C/H/G: Parkin-linked mutations can present atypically

  • Pathogenesis: Kinase hyperactivity leads to dopaminergic neuron dysfunction

  • Therapeutic target: LRRK2 kinase inhibitors in clinical trials

GRN (Progranulin)

GRN haploinsufficiency causes familial frontotemporal dementia with ubiquitin-positive inclusions. 3International PSP Genetics Consortium, PSP GWAS meta-analysis (2019)2019 · PMID 31105264Open reference1

  • Frameshift/nonsense mutations: Cause progranulin deficiency

  • CBS phenotype: Up to 10% of GRN mutation carriers develop CBS (17)

  • Pathology: TDP-43 proteinopathy, not tauopathy

  • Mechanism: Reduced progranulin leads to increased TDP-43 aggregation

C9orf72 Hexanucleotide Repeat Expansion

The C9orf72 repeat expansion causes ALS-FTD spectrum disorders.

  • Repeat >30: Pathological expansion

  • CBS phenotype: Can present as CBS/ALS overlap (18)

  • Pathology: TDP-43 proteinopathy with dipeptide repeat inclusions

  • Mechanism: RNA foci formation and dipeptide repeat protein toxicity

CHCHD10 (Coiled-Coil-Helix-Coiled-Coil-Helix Domain Containing 10)

  • Function: Mitochondrial protein involved in cristae organization

  • CBS association: Rare cause of ALS-FTD spectrum

  • Pathology: Mitochondrial dysfunction, TDP-43 pathology

TBK1 (TANK-Binding Kinase 1)

  • Function: Kinase involved in autophagy and inflammation

  • CBS phenotype: Can present as FTD/ALS/CBS overlap

  • Pathway: Autophagy regulation, interferon signaling

Genetic Risk Factors for Sporadic CBS

Sporadic CBS shows weaker genetic associations than PSP:

Gene/Locus Odds Ratio Strength of Evidence
MAPT H1 1.5-2.0 Moderate
APOE ε4 1.8 Moderate
LRRK2 variants 1.3-1.5 Weak-moderate
GRN variants 1.2-1.4 Weak-moderate

APOE in CBS/PSP

The APOE gene shows complex associations with tauopathies:

  • APOE ε4: Associated with increased risk of AD, but complex relationship with PSP/CBS

  • ε4 carriers: May have earlier age at onset in some studies (19)

  • Neuroprotection hypothesis: ε2 allele may be protective

  • Tau metabolism: APOE affects tau pathology and neuroinflammation

Pathway Analysis and Enrichment

The PSP genetic risk genes converge on pathways relevant to tau pathogenesis:

  1. Tau metabolism: MAPT directly influences tau expression and splicing

  2. Protein quality control: TRIM11, EIF2AK3 involved in degradation pathways

  3. Cellular stress response: DUSP10, EIF2AK3 mediate stress signaling

  4. Post-translational modification: Kinases and phosphatases affecting tau phosphorylation

Myelin and Oligodendrocyte Pathways

MOBP association suggests white matter integrity plays a role in PSP pathogenesis:

  • Oligodendrocyte dysfunction may contribute to axonal degeneration

  • Myelin abnormalities observed in PSP postmortem brain

  • White matter tract degeneration is a key MRI finding in PSP (20)

Vesicle Trafficking and Autophagy

STX6 and related genes implicate intracellular trafficking in PSP:

  • Autophagy-lysosome pathway dysfunction

  • Impaired protein clearance

  • Potential for tau propagation via extracellular vesicles

  • Lysosomal dysfunction contributes to tau aggregation

Unfolded Protein Response

EIF2AK3 (PERK) links ER stress to neurodegeneration:

  • Chronic ER stress in PSP brain

  • Impaired UPR signaling

  • Downstream effects on translation and autophagy

  • PERK inhibition as potential therapeutic strategy

Mitochondrial Quality Control

BNIP3 and related genes highlight mitochondrial involvement:

  • Mitophagy impairment in PSP

  • Accumulation of dysfunctional mitochondria

  • Energy deficit contributing to neurodegeneration

  • Mitochondrial therapeutics in development

Gene Expression Studies

Brain Region-Specific Expression

Gene expression studies in PSP brain tissue reveal:

  • Substantia nigra: Highest pathology burden, altered expression of stress response genes

  • Globus pallidus: Affected in PSP, shows mitochondrial dysfunction signatures

  • Superior frontal cortex: Cortical involvement, synaptic dysfunction genes

  • Brainstem nuclei: Oculomotor circuit disruption, specific vulnerability

Cell Type-Specific Expression

Single-cell studies reveal cell-type specific patterns:

  • Oligodendrocytes: MOBP expression, white matter degeneration

  • Microglia: Inflammatory gene expression, complement activation

  • Neurons: Synaptic dysfunction, energy metabolism alterations

  • Astrocytes: Reactive gliosis, potassium buffering dysfunction

Epigenetic Modifications

DNA Methylation in PSP

Epigenetic changes contribute to PSP pathogenesis:

  • MAPT methylation: Altered methylation patterns in PSP brain

  • Global hypomethylation: Observed in PSP temporal cortex

  • Gene-specific changes: EIF2AK3 and stress response genes

Histone Modifications

  • H3K9me3: Altered in PSP, affects tau expression

  • H3K27ac: Enhancer activity changes in disease state

  • HDAC inhibitors: Potential therapeutic approach

Gene-Environment Interactions

Potential Modifying Factors

While specific gene-environment interactions in CBS/PSP remain incompletely characterized, several factors may modify genetic risk:

  • Head trauma: May interact with tau pathway genes (21)

  • Vascular risk factors: May modify disease expression

  • Cognitive reserve: May modify age at onset

  • Smoking: Complex relationship with neurodegeneration

Lifestyle Factors

  • Physical activity: May modify risk in carriers

  • Diet: Mediterranean diet may reduce risk

  • Sleep: Glymphatic clearance affected in tauopathies

Clinical Implications

Genetic Testing Considerations

  • PSP: MAPT H1 haplotype testing has limited clinical utility

  • CBS: Genetic testing more relevant for familial cases

  • Counseling: Important given complex inheritance patterns

  • Panel testing: FTD/ALS gene panels often include CBS causes

Predictive Testing

  • Pre-symptomatic testing: Generally not recommended

  • Research contexts: Available through research programs

  • Incidental findings: Need for careful counseling

Therapeutic Targets

Genetic findings inform therapeutic development:

  1. MAPT-targeted therapies: ASOs, small molecules targeting tau (22)

  2. Autophagy enhancers: Targeting STX6-associated pathways

  3. UPR modulators: EIF2AK3-based interventions

  4. Protein aggregation inhibitors: Based on TRIM11 biology

  5. Kinase inhibitors: LRRK2 inhibitors for LRRK2-associated cases

Rubric Scoring for Genetic Associations

Gene Association Strength Functional Evidence Pathway Relevance Overall Score
MAPT H1 ★★★★★ ★★★★★ ★★★★★ A
STX6 ★★★★☆ ★★★☆☆ ★★★★☆ B+
MOBP ★★★★☆ ★★★☆☆ ★★★☆☆ B
EIF2AK3 ★★★★☆ ★★★★☆ ★★★★☆ B+
DUSP10 ★★★☆☆ ★★☆☆☆ ★★★☆☆ C+
TRIM11 ★★★☆☆ ★★☆☆☆ ★★★☆☆ C+
RUNX2 ★★★☆☆ ★★☆☆☆ ★★☆☆☆ C
BNIP3 ★★★☆☆ ★★☆☆☆ ★★☆☆☆ C

Scoring Rubric:

  • A: Strong GWAS + functional validation + direct pathway relevance

  • B+: Strong GWAS + some functional evidence

  • B: Moderate GWAS signal + pathway relevance

  • C+: Suggestive evidence + biological plausibility

  • C: Preliminary evidence, needs validation

Cross-References

  • MAPT Gene Page

  • STX6 Gene Page

  • EIF2AK3 Gene Page

  • DUSP10 Gene Page

  • TRIM11 Gene Page

  • LRRK2 Gene Page

  • GRN Protein Page

  • C9orf72 Protein Page

  • APOE Gene Page

  • Tau Protein Page

  • 4R Tauopathy Mechanisms

  • Corticobasal Syndrome

  • Corticobasal Degeneration

  • PSP

  • Progressive Supranuclear Palsy

Polygenic Risk Scores

PRS Development in PSP

Polygenic risk scores (PRS) aggregate the effects of multiple risk variants:

  • Number of SNPs: Current PRS includes ~2,000-5,000 SNPs

  • Prediction accuracy: Area under curve (AUC) ~0.7-0.75

  • Validation: Independent cohort validation shows moderate predictive power

  • Clinical utility: Not yet ready for clinical implementation

Comparison with Other Tauopathies

Disease PRS AUC Top GWAS Hits
PSP 0.72 MAPT, STX6, MOBP
CBD 0.65 MAPT, GRN
AD 0.85 APOE, CLU, PICALM
PD 0.75 SNCA, LRRK2, GBA

Animal Models

Genetic Models of PSP

Transgenic and knock-in models help understand PSP genetics:

  • MAPT transgenic mice: Express human MAPT with P301L mutation

  • STX6 knockout mice: Autophagy deficits, behavioral changes

  • EIF2AK3 models: ER stress, memory deficits

Phenotypic Correlation

  • Tau pathology: Variable across models

  • Motor symptoms: Some models show gait abnormalities

  • Cognitive deficits: Working memory impairments

Pharmacogenomics

Response to Treatment

Genetic factors may influence treatment response:

  • Lithium response: Genetic modifiers of neuroprotection

  • CoQ10 response: Mitochondrial genetic variants

  • Tau immunotherapy: Genetic predictors of outcome

Future Directions

  • Personalized medicine: Genetic stratification for clinical trials

  • Biomarker development: Genetic predictors of progression

  • Therapeutic development: Target validation using genetic data

Research Challenges

Limitations of Current Studies

  • Sample size: PSP is rare, limiting GWAS power

  • Population diversity: Most studies in European ancestry

  • Phenotypic heterogeneity: Clinical subtypes vary genetically

  • Functional validation: Many risk alleles lack functional evidence

Future Research Needs

  • Multi-omics integration: Transcriptomics, proteomics, metabolomics

  • Single-cell approaches: Cell-type specific genetic effects

  • Diversity initiatives: Studies in non-European populations

  • Longitudinal cohorts: Progression genetics

Resources and Databases

Genetic Databases

  • International PSP Genetics Consortium: Shared data resources

  • Frontotemporal Dementia Variation Project: Genotype-phenotype correlations

  • Genome Aggregation Database (gnomAD): Population frequencies

  • GWAS Catalog: Published associations

Research Consortia

  • International PSP Genetics Consortium (IPSG): Primary resource

  • Genetic Frontotemporal dementia Initiative (GENFI): FTD genetics

  • ALS Sequencing Consortium: C9orf72 and related genes

Comparison with Other Neurodegenerative Diseases

PSP vs. Parkinson’s Disease Genetics

PSP and PD share some genetic susceptibility factors but differ significantly:

Gene PSP PD Shared?
LRRK2 Minor role Major cause Yes
GBA Weak Strong risk Yes
SNCA No Major cause No
MAPT Strong No No
STX6 Strong No No

PSP vs. Alzheimer’s Disease Genetics

AD and PSP both involve protein aggregation but have distinct genetic architectures:

  • APOE ε4: Strong AD risk, weak/none in PSP

  • MAPT: Strong PSP risk, modest AD risk

  • TREM2: Strong AD risk, limited in PSP

  • CLU, PICALM: AD-specific, not PSP

PSP vs. Corticobasal Degeneration

CBD shows genetic overlap with both PSP and FTD:

  • MAPT: Risk in both, stronger in PSP

  • GRN: CBD risk, not PSP

  • C9orf72: Both can have CBS phenotypes

  • TMEM106B: Modifies FTD/CBD, not PSP

Neuroimaging Genetics

White Matter Integrity

Genetic variants affecting white matter:

  • MOBP: Myelin integrity, DTI changes

  • STX6: Vesicle trafficking in oligodendrocytes

  • Genetic imaging: GWAS of MRI traits in progress

Brain Atrophy Patterns

Genotype-phenotype correlations:

  • MAPT H1: Midbrain atrophy severity

  • APOE: Cortical thinning patterns

  • Genetic predictors: Regional vulnerability

Functional Genomics

Expression Quantitative Trait Loci (eQTLs)

Brain eQTLs inform functional mechanisms:

  • STX6 eQTL: Risk allele reduces expression

  • EIF2AK3 eQTL: Altered stress response

  • MOBP eQTL: Myelin gene regulation

Methylation QTLs

  • MAPT methylation: H1 haplotype affects methylation

  • Disease-specific changes: PSP vs. controls

Proteomic Studies

  • Tau isoforms: 4R:3R ratio alterations

  • STX6 protein: Reduced in PSP brain

  • UPR markers: Elevated in affected regions

Emerging Topics

Rare Variants

Whole-exome sequencing reveals rare variants:

  • TREM2 variants: Possible PSP risk (23)

  • OPTN: Autophagy gene, rare variants

  • VCP: Inclusion body myopathy with FTD

Copy Number Variations

  • Deletions: Rare large deletions in MAPT region

  • Duplications: MAPT duplications cause FTD

  • Clinical significance: Variable penetrance

Mitochondrial DNA

  • Common variants: Limited role in PSP

  • Somatic mutations: Accumulate in affected brain regions

  • Heteroplasmy: Variable across tissues

Clinical Trial Considerations

Genetic Stratification

  • Trial design: Enriching for genetic subtypes

  • Biomarker endpoints: Genetic modifiers of response

  • Patient selection: Precision medicine approaches

Target Validation

  • Genetic evidence: Supporting therapeutic targets

  • Mendelian randomization: Causal inference

  • Drug repurposing: Genetic evidence for existing drugs

Historical Perspective

Discovery Timeline

  • 1994: MAPT mutations cause FTDP-17

  • 2004: H1 haplotype association with PSP

  • 2011: First large-scale GWAS (Hoglinger et al.)

  • 2015: STX6, MOBP, EIF2AK3 identified

  • 2019: Expanded GWAS meta-analysis

  • 2021: New risk loci (RUNX2, BNIP3)

Key Researchers

  • John Hardy: MAPT mutations, tau hypothesis

  • Gerard Schellenberg: MAPT haplotype discovery

  • Günter Höglinger: GWAS leadership

  • Irene Litvan: Clinical characterization

See Also

Disease and Clinical Phenotype Context

  • Progressive Supranuclear Palsy (PSP)

  • Corticobasal Degeneration (CBD)

  • Primary Age-Related Tauopathy (PART)

  • Corticobasal Syndrome

Core Mechanisms

  • Tauopathy

  • Cortisol-Tau Pathway

  • Gut-Brain Axis in Tauopathy

  • Microglial Neuroinflammation

  • NLRP3 Inflammasome

  • CBS/PSP Genetic Architecture

Genetics and Molecular Risk

Biomarkers and Imaging

  • Tau PET in CBS/PSP

  • MRI Atrophy Patterns in CBS/PSP

  • DTI White Matter in CBS/PSP

  • PSP Biomarkers

  • Plasma p-tau217

  • CSF p-tau181

  • CSF p-tau231

Therapeutic and Management Pages

  • CBS/PSP Treatment Rankings

  • CBS/PSP Daily Action Plan

  • CBS/PSP Rehabilitation Guide

  • CBS/PSP Clinical Trials Guide

  • Melatonin for Tauopathy

  • Lithium for Tauopathy

  • Rapamycin for Tauopathy

  • Methylene Blue for Tauopathy

  • TUDCA/UDCA for Neurodegeneration

  • Photobiomodulation for Neurodegeneration

Vulnerable Cell Types and Circuits

Recent Research Updates (2024-2026)

References

  1. MAPT H1 haplotype and PSP risk (2008) Conrad et al. 2008 · PMID 18627048
  2. H1c subhaplotype in PSP (2005) Pittman et al. 2005 · PMID 15809343
  3. International PSP Genetics Consortium, PSP GWAS meta-analysis (2019) 2019 · PMID 31105264
  4. Novel PSP risk loci (2018) Chen et al. 2018 · PMID 29666634
  5. STX6 and MOBP in PSP (2015) Kouri et al. 2015 · PMID 25663141
  6. Identification of new PSP risk genes (2011) Höglinger et al. 2011 · PMID 21325637
  7. Tau pathology in CBS (2006) Williams et al. 2006 · PMID 16682105
  8. GRN mutations causing CBS (2009) Rohrer et al. 2009 · PMID 19191326
  9. C9orf72 expansions in CBS (2014) Murray et al. 2014 · PMID 24606701
  10. Neuropathology of PSP (2010) Dickson et al. 2010 · PMID 20157239
  11. FTDP-17 and CBS phenotypes (1999) Bugiani et al. 1999 · PMID 10508520
  12. STX6 eQTL in PSP brain (2017) Schneider et al. 2017 · PMID 28472232
  13. Unfolded protein response in PSP (2013) Stutzbach et al. 2013 · PMID 23538854
  14. TRIM11 and tau degradation (2019) Saito et al. 2019 · PMID 31180123
  15. Large-scale PSP meta-analysis (2021) Wen et al. 2021 · PMID 34534123
  16. LRRK2 in atypical parkinsonism (2018) Müller et al. 2018 · PMID 29686747
  17. GRN mutations and CBS (2006) Baker et al. 2006 · PMID 16636233
  18. C9orf72 and CBS/ALS (2013) Boeve et al. 2013 · PMID 24214386
  19. APOE in PSP and CBD (2013) Tsuang et al. 2013 · PMID 23595626
  20. White matter in PSP (2006) Boxer et al. 2006 · PMID 16437556
  21. Head trauma and PSP (2019) Jellinger et al. 2019 · PMID 30647932
  22. Tau-targeting ASOs (2023) Schoffelen et al. 2023 · PMID 37293345

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