Progressive Supranuclear Palsy

1. Disease Information

2026-06-05
Falcon MONDO:0019037 Model: Edison Scientific Literature 73 citations

1. Disease Information

1.1 Definition and overview

Progressive supranuclear palsy (PSP) is a neuropathologically defined, adult-onset, rapidly progressive neurodegenerative disorder in which abnormal tau aggregates (predominantly 4-repeat/4R tau) accumulate in neurons and glia, producing characteristic motor (postural instability, falls, akinesia), ocular motor, and cognitive/behavioral syndromes. Definite diagnosis remains neuropathologic, but research/clinical criteria have been revised to improve ante-mortem sensitivity for variant phenotypes. (hoglinger2017clinicaldiagnosisof pages 2-3, wise2024csfproteomicsin pages 1-2, whitney2024singlecelltranscriptomicand pages 1-2)

A widely recognized “classical” clinical phenotype is PSP–Richardson syndrome (PSP-RS), often featuring oculomotor dysfunction and early postural instability, with median survival reported as ~6.9 years in a contemporary biomarker cohort study. (wise2024csfproteomicsin pages 1-2)

1.2 Key identifiers and synonyms

A MONDO disease identifier is available via OpenTargets: MONDO:0019037 (progressive supranuclear palsy). (OpenTargets Search: Progressive supranuclear palsy)

ICD coding in retrieved sources: ICD-9 333.0 was used for case ascertainment in an Israeli health-provider cohort; authors noted nonspecificity requiring verification for externally coded diagnoses. ICD-10, MeSH, and OMIM numeric identifiers were not explicitly provided in the retrieved texts. (barer2023progressivesupranuclearpalsy’s pages 1-2)

Common synonyms/clinical labels include PSP-RS, PSP-P (parkinsonism), PSP-PGF (progressive gait freezing), PSP-SL (speech/language), PSP-F (frontal/behavioral), PSP-CBS, PSP-OM, PSP-PI, and others per MDS framework. (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2)

Table (click to expand)
Category Term / Identifier Code / Expansion Notes Source URL / Year
Disease Progressive supranuclear palsy PSP Primary disease name; sporadic 4R-tauopathy / neuropathologically defined disease entity (hoglinger2017clinicaldiagnosisof pages 2-3, whitney2024singlecelltranscriptomicand pages 1-2) MDS criteria; Acta Neuropathol paper https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.1007/s00401-024-02823-w (2024)
Ontology MONDO MONDO:0019037 OpenTargets disease identifier for progressive supranuclear palsy (OpenTargets Search: Progressive supranuclear palsy) OpenTargets https://platform.opentargets.org/ (accessed via OpenTargets context; current)
Coding ICD-9 333.0 Used in Israeli cohort ascertainment; noted as nonspecific and externally verified in chart review (barer2023progressivesupranuclearpalsy’s pages 1-2) Barer et al. https://doi.org/10.1007/s00415-023-11714-1 (2023)
Coding ICD-10 Not explicitly reported in cited PSP papers retrieved here No directly citable ICD-10 code was provided in the available contexts (barer2023progressivesupranuclearpalsy’s pages 1-2) Available cited cohort literature https://doi.org/10.1007/s00415-023-11714-1 (2023)
Historical / classic phenotype Richardson syndrome PSP-RS Classical / most recognized phenotype; early falls and vertical gaze dysfunction emphasized across reviews and criteria (boxer2017advancesinprogressive pages 3-4, wise2024csfproteomicsin pages 1-2) Boxer et al.; Wise et al. https://doi.org/10.1016/S1474-4422(17)30157-6 (2017); https://doi.org/10.1212/WNL.0000000000209585 (2024)
Phenotype label PSP-parkinsonism PSP-P Variant phenotype with parkinsonian presentation; listed in MDS-era phenotype frameworks (boxer2017advancesinprogressive pages 3-4, nasri2024phenotypicspectrumof pages 1-2) Boxer et al.; Nasri et al. https://doi.org/10.1016/S1474-4422(17)30157-6 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with progressive gait freezing PSP-PGF Variant phenotype dominated by gait freezing / pure akinesia with gait freezing (boxer2017advancesinprogressive pages 3-4, nasri2024phenotypicspectrumof pages 1-2) Boxer et al.; Nasri et al. https://doi.org/10.1016/S1474-4422(17)30157-6 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with speech/language disorder PSP-SL Variant overlapping with nonfluent/agrammatic PPA or apraxia of speech (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) MDS criteria paper; Nasri et al. https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with frontal presentation PSP-F Frontal / behavioral-dysexecutive variant (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) MDS criteria paper; Nasri et al. https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with corticobasal syndrome PSP-CBS Corticobasal syndrome presentation attributed to PSP pathology in some cases (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) MDS criteria paper; Nasri et al. https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with ocular motor dysfunction PSP-OM Ocular motor–predominant presentation recognized in MDS spectrum (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) MDS criteria paper; Nasri et al. https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Phenotype label PSP with predominant postural instability PSP-PI Postural instability–predominant presentation recognized in MDS spectrum (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) MDS criteria paper; Nasri et al. https://doi.org/10.1002/mds.26987 (2017); https://doi.org/10.14802/jmd.23178 (2024)
Related ontology labels Classical progressive supranuclear palsy Orphanet_240071 Listed in OpenTargets association context as disease subtype label (OpenTargets Search: Progressive supranuclear palsy) OpenTargets / Orphanet label https://platform.opentargets.org/ (current)
Related ontology labels Atypical progressive supranuclear palsy Orphanet_99750 Listed in OpenTargets association context as disease subtype label (OpenTargets Search: Progressive supranuclear palsy) OpenTargets / Orphanet label https://platform.opentargets.org/ (current)
Related ontology labels Progressive supranuclear palsy-parkinsonism syndrome MONDO:0009839 Variant/parkinsonism-related disease label surfaced in OpenTargets context (OpenTargets Search: Progressive supranuclear palsy) OpenTargets https://platform.opentargets.org/ (current)
Inherited disease label Supranuclear palsy, progressive, 1 MONDO:0010997 Separate inherited / gene-linked label associated with MAPT in OpenTargets context (OpenTargets Search: Progressive supranuclear palsy) OpenTargets https://platform.opentargets.org/ (current)

Table: This table compiles key standardized identifiers and commonly used clinical synonyms/phenotype labels for progressive supranuclear palsy. It is useful for mapping disease terminology across ontologies, coding systems, and clinical subtype literature.

1.3 Evidence source type (patient-level vs aggregated)

PSP characterization is derived from both aggregated resources (e.g., OpenTargets ontology mapping) and aggregated cohort/trial/omics literature. Real-world evidence in this report includes retrospective medical-record abstraction across multiple care centers in the US/Canada and a large Israeli payer-provider database cohort. (nysetvold2024progressivesupranuclearpalsy pages 1-2, barer2023progressivesupranuclearpalsy’s pages 1-2)


2. Etiology

2.1 Primary causal factors

PSP is typically sporadic, with pathogenesis centered on tau (MAPT) biology, especially 4R tau accumulation and aggregation in vulnerable brain regions and cell types. (hoglinger2017clinicaldiagnosisof pages 2-3, whitney2024singlecelltranscriptomicand pages 1-2)

Rare familial PSP-like syndromes can occur with MAPT mutations, but most cases lack Mendelian inheritance; in MDS criteria, MAPT mutations are not an exclusion criterion but define inherited vs sporadic PSP. (hoglinger2017clinicaldiagnosisof pages 3-4)

2.2 Genetic risk factors (2023–2024 emphasis)

A 2024 whole-genome sequencing (WGS) case-control study (European ancestry) emphasized that prior array-GWAS were limited for rare variants and structural variants (SVs), and used WGS to analyze SNVs/indels/SVs at scale. (wang2024wholegenomesequencinganalysis pages 1-2)

Key genetic findings include: - MAPT 17q21.31 H1 haplotype is the strongest known common risk factor; the WGS study reports an estimated OR = 5.6 for H1 carriers. (wang2024wholegenomesequencinganalysis pages 1-2) - WGS confirmed known loci (e.g., MAPT, MOBP, STX6, SLCO1A2, DUSP10, SP1) and identified novel common signals (APOE, FCHO1/MAP1S, KIF13A, TRIM24, TNXB, ELOVL1). (wang2024wholegenomesequencinganalysis pages 1-2) - Notably, APOE ε2 was observed as the risk allele in PSP (in contrast to Alzheimer’s disease). (wang2024wholegenomesequencinganalysis pages 1-2) - Rare-variant association implicated ZNF592, and SV associations included seven common SVs in 17q21.31 and other loci (IGH, PCMT1, CYP2A13, SMCP), plus a burden of rare deletions/duplications in 17q21.31 (P = 6.73 × 10^-3). (wang2024wholegenomesequencinganalysis pages 1-2)

Mechanistically, MAPT haplotype effects are supported by transcriptomic evidence: a 2024 post-mortem bulk RNA-seq study found increased total tau mRNA and increased proportion of 4R transcripts in PSP brain regions, with 4R tau mRNA levels associated with the H1 haplotype, consistent with a causal role for altered splicing/expression. (ressler2024mapthaplotypeassociatedtranscriptomic pages 1-2)

Table (click to expand)
Factor / locus Risk role in PSP Key quantitative finding Study design / cohort Sample size Year DOI / URL Citation
MAPT 17q21.31 H1/H2 haplotype region Strongest common genetic risk locus H1 haplotype associated with PSP risk; estimated OR = 5.6 Whole-genome sequencing (WGS) case-control study in European ancestry PSP 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
MAPT H1 haplotype Candidate mechanistic driver via altered tau isoform expression 4R tau mRNA significantly associated with H1 haplotype in temporal cortex; total tau and 4R tau transcripts increased in PSP cerebellum Bulk RNA-seq of post-mortem brain tissue with haplotype-dependent expression/splicing analyses 84 PSP; 77 controls 2024 https://doi.org/10.1186/s40478-024-01839-3 (ressler2024mapthaplotypeassociatedtranscriptomic pages 1-2)
MAPT Confirmed common susceptibility locus Reconfirmed among common SNV/indel loci in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
MOBP Confirmed common susceptibility locus; implicates oligodendrocytes/myelin biology Confirmed in WGS; prior association reproduced WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
STX6 Confirmed common susceptibility locus Confirmed in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
SLCO1A2 Confirmed common susceptibility locus Confirmed in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
DUSP10 Confirmed common susceptibility locus Confirmed in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
SP1 Confirmed common susceptibility locus Confirmed in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
APOE locus Novel common susceptibility signal Novel signal identified in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
APOE ε2 allele Risk allele in PSP In contrast to Alzheimer disease, APOE ε2 observed as the risk allele in PSP WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
APOE ε4 allele Potential modifier of phenotype, not core GWAS risk in cited cohort Earlier parkinsonism onset (p = 0.038), earlier oculomotor dysfunction trend (p = 0.052), more altered cognitive profile Cross-sectional clinical phenotype study with APOE genotyping 112 PSP 2024 https://doi.org/10.14802/jmd.23178 (nasri2024phenotypicspectrumof pages 1-2)
FCHO1/MAP1S Novel common susceptibility signal Newly uncovered in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
KIF13A Novel common susceptibility signal Newly uncovered in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
TRIM24 Novel common susceptibility signal Newly uncovered in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
TNXB Novel common susceptibility signal Newly uncovered in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
ELOVL1 Novel common susceptibility signal Newly uncovered in WGS WGS case-control 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
ZNF592 Rare-variant association Significant association in rare SNV/indel analysis WGS rare-variant analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
Structural variants in 17q21.31 Structural genetic risk architecture at major PSP locus Seven common SVs associated with PSP in H1/H2 region and other loci WGS SV association analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
IGH SV-associated locus Common SV association reported WGS SV analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
PCMT1 SV-associated locus Common SV association reported WGS SV analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
CYP2A13 SV-associated locus Common SV association reported WGS SV analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
SMCP SV-associated locus Common SV association reported WGS SV analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
Rare deletions/duplications in H1/H2 region Additional structural burden at major locus Burden of rare deletions/duplications in 17q21.31: P = 6.73 × 10^-3 WGS SV burden analysis 1,718 cases; 2,944 controls 2024 https://doi.org/10.1186/s13024-024-00747-3 (wang2024wholegenomesequencinganalysis pages 1-2)
EIF2AK3, LRRK2, RUNX2 Previously reported PSP risk loci referenced in recent mechanistic/genetic studies Not primary new WGS findings in cited paper, but repeatedly cited as established PSP-associated loci Background from recent single-cell / review literature Not applicable 2024 https://doi.org/10.1007/s00401-024-02823-w ; https://doi.org/10.1007/s40120-024-00614-9 (whitney2024singlecelltranscriptomicand pages 1-2, dunning2024pharmacotherapiesforthe pages 3-4)

Table: This table summarizes the main genetic risk factors and loci implicated in progressive supranuclear palsy, emphasizing the 2024 WGS study and related transcriptomic evidence. It is useful for quickly mapping confirmed loci, novel signals, structural variation findings, and effect estimates such as the MAPT H1 haplotype odds ratio.

2.3 Environmental risk/protective factors and gene–environment interactions

No high-quality, PSP-specific environmental risk factors, protective factors, or gene–environment interactions were identified within the retrieved evidence set for this run. This should be treated as insufficient evidence in the current retrieval, not as evidence of absence.


3. Phenotypes

3.1 Core clinical domains and spectrum

The 2017 MDS-PSP criteria identify four functional domains as clinical predictors: ocular motor dysfunction, postural instability, akinesia, and cognitive dysfunction, with features contributing different diagnostic certainty levels (probable, possible, suggestive). (hoglinger2017clinicaldiagnosisof pages 2-3)

Variant clinical presentations beyond PSP-RS are common in autopsy series, motivating the criteria revision. (hoglinger2017clinicaldiagnosisof pages 2-3)

3.2 Phenotype frequencies and timelines (recent cohort evidence)

  • In a 2024 Tunisian cohort recategorized by MDS-PSP phenotypes (n=112), the distribution included PSP-RS (48), PSP-cortical (34; e.g., PSP-CBS 17.6%, PSP-F 9.4%, PSP-SL 8.2%), and PSP-subcortical (30; PSP-P 11.6%, PSP-PI 8.0%, PSP-OM 2.7%, PSP-PGF 1.8%, PSP-C 1.8%, PSP-PLS 0.9%). (nasri2024phenotypicspectrumof pages 1-2)
  • In a 2024 US/Canada medical-record real-world study (n=72), falls were documented in 79.2% before diagnosis and 97.2% during the course; among those with onset dates documented, median onset was 2.0 years before diagnosis for first fall, 1.2 years for unsteady gait/gait impairment, and 0.8 years for mobility problems. (nysetvold2024progressivesupranuclearpalsy pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 2-4)

3.3 HPO term suggestions

A practical mapping of major PSP symptoms to HPO labels is provided below.

Table (click to expand)
Clinical feature Suggested HPO term Phenotype group(s) Frequency / statistic from cohorts Evidence
Vertical supranuclear gaze palsy / slow vertical saccades Vertical supranuclear gaze palsy (HPO label); Slow saccadic eye movements (HPO label) PSP-RS, PSP-OM Vertical supranuclear gaze palsy is the classic defining sign of PSP; MDS criteria note ocular motor dysfunction as 1 of 4 core domains. In the Tunisian phenotype cohort, PSP-OM represented 2.7% of all PSP cases; PSP-RS remained the most common phenotype group (48/112). (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2) (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2)
Postural instability Postural instability (HPO label) PSP-RS, PSP-PI MDS criteria identify postural instability as a core diagnostic domain. In the Tunisian cohort, PSP-PI accounted for 8.0% of cases; in real-world records, 68.1% had unsteady gait/gait impairment documented before diagnosis, with median onset 1.2 years before diagnosis. (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 2-4) (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 2-4)
Recurrent falls Frequent falls (HPO label); Recurrent falls (HPO label) PSP-RS, PSP-PI In the US/Canada real-world cohort, falling was documented in 79.2% before diagnosis and 97.2% across the disease course; median time to first fall was 2.0 years before diagnosis. Falls are central to Richardson syndrome and MDS/NINDS-SPSP-style criteria. (nysetvold2024progressivesupranuclearpalsy pages 2-4, nysetvold2024progressivesupranuclearpalsy pages 1-2, hoglinger2017clinicaldiagnosisof pages 2-3) (nysetvold2024progressivesupranuclearpalsy pages 2-4, nysetvold2024progressivesupranuclearpalsy pages 1-2, hoglinger2017clinicaldiagnosisof pages 2-3)
Gait freezing / progressive gait freezing Freezing of gait (HPO label) PSP-PGF PSP-PGF is an established variant in the MDS spectrum. In the Tunisian cohort, PSP-PGF represented 1.8% of all PSP cases. Real-world records showed mobility problems in 51.4% before diagnosis, with median onset 0.8 years before diagnosis. (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2) (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2)
Akinesia / bradykinesia / rigidity Bradykinesia (HPO label); Akinetic-rigid parkinsonism (HPO label); Rigidity (HPO label) PSP-RS, PSP-P PSP-RS patients in the Tunisian cohort had more akinetic-rigid and levodopa-resistant parkinsonism (p = 0.006), while PSP-P made up 11.6% of cases. PSP pathology/clinical descriptions consistently include akinesia and rigidity as key motor manifestations. (nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2, dam2021safetyandefficacy pages 1-6) (nasri2024phenotypicspectrumof pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2, dam2021safetyandefficacy pages 1-6)
Dysphagia Dysphagia (HPO label) PSP-RS, advanced PSP across phenotypes Dysphagia is highlighted as an additional symptom emerging with progression in PSP-RS and contributes materially to disease burden and supportive-care needs. No cohort percentage was provided in the retrieved contexts, but it is repeatedly cited as a common progressive feature. (dam2021safetyandefficacy pages 1-6, barer2023progressivesupranuclearpalsy’s pages 1-2) (dam2021safetyandefficacy pages 1-6, barer2023progressivesupranuclearpalsy’s pages 1-2)
Dysarthria Dysarthria (HPO label) PSP-RS, PSP-SL Dysarthria is a common speech/bulbar manifestation of PSP and contributes to healthcare utilization and speech-therapy needs. No specific frequency was given in the retrieved cohort excerpts. (barer2023progressivesupranuclearpalsy’s pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2) (barer2023progressivesupranuclearpalsy’s pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2)
Cognitive decline / dementia Cognitive impairment (HPO label); Dementia (HPO label) PSP-RS, PSP-F, PSP-SL, cortical PSP Cognitive dysfunction is one of the 4 MDS core domains. In longitudinal follow-up, annual decline was faster in Richardson syndrome than variants on MMSE: -1.8 vs -0.9/year and ACE-R: -5.3 vs -3.0/year. PSP-cortical phenotypes showed greater cognitive alteration than PSP-subcortical phenotypes. (hoglinger2017clinicaldiagnosisof pages 2-3, street2021clinicalprogressionof pages 1-2, nasri2024phenotypicspectrumof pages 1-2) (hoglinger2017clinicaldiagnosisof pages 2-3, street2021clinicalprogressionof pages 1-2, nasri2024phenotypicspectrumof pages 1-2)
Frontal behavioral changes / dysexecutive syndrome Behavioral abnormality (HPO label); Executive dysfunction (HPO label); Frontal lobe syndrome (HPO label) PSP-F PSP with frontal presentation is a recognized MDS phenotype. In the Tunisian cohort, PSP-F accounted for 9.4% of all cases; APOE ε4 carriers had more altered cognitive profiles. (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2)
Speech/language impairment: nonfluent aphasia / apraxia of speech Nonfluent aphasia (HPO label); Apraxia of speech (HPO label); Speech impairment (HPO label) PSP-SL PSP-SL is an established MDS phenotype overlapping with nonfluent/agrammatic PPA and apraxia of speech. In the Tunisian cohort, PSP-SL represented 8.2% of all cases. (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2) (hoglinger2017clinicaldiagnosisof pages 3-4, nasri2024phenotypicspectrumof pages 1-2)
Depression Depression (HPO label) Non-motor across phenotypes In the FMT PSP-RS trial, depression improved significantly after treatment as a secondary outcome. In the US/Canada medical-record cohort, depression was a common comorbidity; the paper’s snippet cites 44.4% comorbidity prevalence. (tian2023efficacyoffaecal pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2) (tian2023efficacyoffaecal pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 1-2)
Anxiety Anxiety (HPO label) Non-motor across phenotypes Anxiety improved significantly in the FMT PSP-RS trial after 3-cycle intervention and remained improved for many participants at follow-up. No baseline prevalence percentage was provided in the retrieved snippets. (tian2023efficacyoffaecal pages 1-2) (tian2023efficacyoffaecal pages 1-2)
Constipation Constipation (HPO label) Non-motor across phenotypes GI dysfunction is frequent in PSP-RS; the FMT trial notes that more than 80% of PSP patients experience GI symptoms and reported significant improvement in constipation after FMT. (tian2023efficacyoffaecal pages 1-2) (tian2023efficacyoffaecal pages 1-2)
Ocular motor dysfunction (broader category) Abnormality of eye movement (HPO label) PSP-RS, PSP-OM Ocular motor dysfunction is one of the four MDS core functional domains and is especially relevant in PSP-RS and PSP-OM. In the Tunisian cohort, PSP-OM was 2.7% of cases; APOE ε4 carriers had earlier oculomotor dysfunction (p = 0.052). (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2) (hoglinger2017clinicaldiagnosisof pages 2-3, nasri2024phenotypicspectrumof pages 1-2)

Table: This table maps common progressive supranuclear palsy phenotypes and core symptoms to suggested HPO terms, while adding quantitative cohort data where available. It is useful for phenotype annotation in a disease knowledge base and for harmonizing clinical features across PSP subtypes.

3.4 Quality of life impact

Direct QoL instrument data (e.g., EQ-5D, SF-36) were not extracted from the retrieved primary evidence in this run; however, real-world evidence indicates extensive supportive-care and assistive-device needs (see Treatments/Applications section), which reflect substantial functional impairment burden. (nysetvold2024progressivesupranuclearpalsy pages 1-2)


4. Genetic/Molecular Information

4.1 Major genes and loci

Key genes/loci supported by contemporary WGS and/or prior GWAS replication include MAPT, MOBP, STX6, SLCO1A2, DUSP10, SP1, with novel signals including APOE and others. (wang2024wholegenomesequencinganalysis pages 1-2)

4.2 Pathogenic variants (rare familial PSP and related syndromes)

The retrieved MDS criteria explicitly note that MAPT rare variants (mutations) are not an exclusion criterion but indicate inherited PSP; MDS criteria also note that MAPT H2 homozygosity is not an exclusion but makes PSP less likely. (hoglinger2017clinicaldiagnosisof pages 3-4)

A complete ClinVar/gnomAD-level catalog (variant nomenclature and allele frequencies) was not obtained in this run.

4.3 Epigenetic information

An epigenome-wide DNA methylation comparison in frontal lobe white matter across parkinsonian disorders identified shared and disease-relevant pathway dysregulation including Wnt signaling, ER stress, mitochondrial processes, RNA interference, and endosomal transport. (murthy2024dnamethylationpatterns pages 1-2)


5. Environmental Information

No PSP-specific infectious/toxic/lifestyle drivers were identified within the retrieved sources for this run. Gastrointestinal dysfunction is frequent in PSP and is being therapeutically targeted (FMT trial), but this does not establish a causal environmental etiology. (tian2023efficacyoffaecal pages 1-2)


6. Mechanism / Pathophysiology (Current Understanding, 2023–2024 emphasis)

6.1 Causal chain (high-level)

Genetic predisposition (notably MAPT H1 haplotype and additional risk loci including stress-pathway genes such as EIF2AK3/PERK) appears to bias tau expression/splicing toward 4R isoforms. This supports a cellular environment prone to tau misfolding/aggregation and spread. Subsequent downstream cascades include ER stress/integrated stress response activation, synaptic/axon guidance and trafficking pathway dysregulation, and neuroinflammatory activation, culminating in region- and cell-type-specific degeneration and clinical syndromes. (wang2024wholegenomesequencinganalysis pages 1-2, ressler2024mapthaplotypeassociatedtranscriptomic pages 1-2, whitney2024singlecelltranscriptomicand pages 1-2, wise2024csfproteomicsin pages 1-2)

6.2 Cell types, pathways, and regions (ontology-ready)

A structured mechanism table with CL/GO/UBERON suggestions is provided.

Table (click to expand)
Mechanism summary Upstream trigger / risk Key evidence / quantitative result Primary cell types (CL suggestion) Affected anatomical regions (UBERON suggestion) GO biological process term suggestions Evidence source DOI / year
4R tau accumulation and aggregation in neurons and glia drives PSP neurodegeneration through hyperphosphorylated tau inclusions, impaired proteostasis, and cell-to-cell seeding Sporadic PSP biology; MAPT-linked 4R tau predisposition; tau seeding/propagation PSP is neuropathologically defined by aggregated 4R tau in neurons, astrocytes, and oligodendrocytes; tau inclusions include neurofibrillary tangles, tufted astrocytes, and coiled bodies; MAPT expression is preserved in all 3 cell types with tau aggregates, supporting ongoing local tau production that can feed aggregation/seeding (hoglinger2017clinicaldiagnosisof pages 2-3, whitney2024singlecelltranscriptomicand pages 1-2, forrest2023cellspecificmaptgene pages 1-2) neuron (CL:0000540); astrocyte (CL:0000127); oligodendrocyte (CL:0000128) subthalamic nucleus (UBERON:0001906); globus pallidus (UBERON:0002427); midbrain (UBERON:0001891); cerebellum (UBERON:0002037) protein phosphorylation (GO:0006468); protein aggregation (GO:0070207); microtubule cytoskeleton organization (GO:0000226); neuron death (GO:0070997) 10.1002/mds.26987 (2017); 10.1007/s00401-024-02823-w (2024); 10.1007/s00401-023-02604-x (2023)
MAPT haplotype-associated increase in 4R tau mRNA likely acts upstream of tau aggregation 17q21.31 inversion / MAPT H1 haplotype; structural variation around MAPT/KANSL1 H1 haplotype is the strongest common genetic risk with OR ~5.6; bulk RNA-seq showed increased total tau and 4R tau transcripts in PSP cerebellum and increased 4R tau reads in temporal cortex; 4R tau mRNA levels were significantly associated with H1 in temporal cortex, supporting an upstream splicing/expression mechanism (wang2024wholegenomesequencinganalysis pages 1-2, ressler2024mapthaplotypeassociatedtranscriptomic pages 1-2) excitatory/inhibitory neuron (CL:0000540); astrocyte (CL:0000127); oligodendrocyte (CL:0000128) cerebellum (UBERON:0002037); temporal cortex (UBERON:0016529); midbrain (UBERON:0001891) regulation of mRNA splicing, via spliceosome (GO:0048024); RNA processing (GO:0006396); regulation of gene expression (GO:0010468) 10.1186/s13024-024-00747-3 (2024); 10.1186/s40478-024-01839-3 (2024)
Integrated stress response / EIF2 signaling and PERK(EIF2AK3) activation links tau burden to maladaptive stress signaling and downstream apoptosis/autophagy failure Genetic risk at EIF2AK3; chronic proteotoxic and ER stress induced by tau pathology Single-nucleus RNA-seq of 50,708 nuclei from PSP diencephalon identified EIF2 signaling activated across vulnerable cell types; activated eIF2α positively correlated with tau pathology burden in subthalamic nucleus and thalamus and colocalized with p-tau-positive neurons and ALDH1L1-positive astrocytes; GWAS had already implicated EIF2AK3/PERK as a PSP risk locus (whitney2024singlecelltranscriptomicand pages 12-14, whitney2024singlecelltranscriptomicand pages 1-2) neuron (CL:0000540); astrocyte (CL:0000127); oligodendrocyte (CL:0000128); microglial cell (CL:0000129) subthalamic nucleus (UBERON:0001906); thalamus (UBERON:0001897); globus pallidus (UBERON:0002427); visual cortex / occipital cortex as relatively spared comparator (UBERON:0001870) integrated stress response signaling (GO:0034976-related); response to endoplasmic reticulum stress (GO:0034976); translational initiation (GO:0006413); regulation of apoptotic process (GO:0042981); autophagy (GO:0006914) 10.1007/s00401-024-02823-w (2024)
Axon-guidance, synaptic, vesicle-cytoskeletal, and cytokine-signaling modules are dysregulated in PSP CSF, consistent with circuit dysfunction downstream of tauopathy Tau-mediated network degeneration and synaptic/axonal injury SOMAmer CSF proteomics found 155/5,026, 959/7,595, and 321/5,026 differentially expressed SOMAmers across original, validation, and neuropathology-confirmed cohorts; three coexpression modules implicated synaptic function/JAK-STAT (beta = -0.044, corrected p = 0.002), vesicle-cytoskeletal trafficking (beta = 0.039, p = 0.007), and cytokine-cytokine receptor interaction (beta = -0.032, p = 0.035); axon guidance was the top dysregulated pathway across cohorts and an axon-guidance panel gave AUC 0.924/0.815/0.932 (wise2024csfproteomicsin pages 1-2) neuron (CL:0000540); synapse-associated neuronal populations; astrocyte (CL:0000127) dorsal midbrain (UBERON:0001891); globus pallidus (UBERON:0002427); subthalamic nucleus (UBERON:0001906) axon guidance (GO:0007411); synapse organization (GO:0050808); vesicle-mediated transport (GO:0016192); JAK-STAT cascade (GO:0007259); cytokine-mediated signaling pathway (GO:0019221) 10.1212/WNL.0000000000209585 (2024)
Complement/C4A-associated oligodendrocyte activation suggests glial and myelin-related mechanisms in PSP PSP GWAS risk architecture; oligodendrocyte-specific regulatory effects; complement dysregulation Integrative genetics/transcriptomics/histology work implicated glial activation, oligodendrocyte-specific epigenomic/eQTL effects at many loci, elevated C4A expression, and histologic colocalization of tau aggregates with C4 complement in oligodendrocytes; this supports complement-associated oligodendroglial pathology as part of etiopathogenesis (farrell2024genetictranscriptomichistological pages 4-7) oligodendrocyte (CL:0000128); astrocyte (CL:0000127); microglial cell (CL:0000129) white matter (UBERON:0002316); globus pallidus (UBERON:0002427); brainstem (UBERON:0002298) complement activation (GO:0006956); gliogenesis (GO:0042063); myelination (GO:0042552); regulation of immune response (GO:0050776) 10.1101/2023.11.09.565552 (2024 preprint)
White-matter DNA methylation changes implicate Wnt signaling, ER stress, mitochondrial dysfunction, RNA interference, and endosomal transport as convergent downstream molecular programs Epigenetic dysregulation in parkinsonian white matter; shared but PSP-relevant white-matter pathology EPIC-array profiling of frontal lobe white matter from PSP (n = 16) and controls identified co-methylation signatures affecting Wnt signaling, signal transduction, endoplasmic reticulum stress, mitochondrial processes, RNA interference, and endosomal transport; PSP white matter showed disease-specific and shared alterations relevant to neurodegeneration (murthy2024dnamethylationpatterns pages 1-2) oligodendrocyte (CL:0000128); astrocyte (CL:0000127); microglial cell (CL:0000129) frontal lobe white matter (UBERON suggestion: frontal lobe UBERON:0001870 + white matter UBERON:0002316); cerebrum white matter (UBERON:0002316) Wnt signaling pathway (GO:0016055); response to endoplasmic reticulum stress (GO:0034976); mitochondrial ATP synthesis coupled electron transport (GO:0042775); endosomal transport (GO:0016197); RNA interference (GO:0016246) 10.1007/s00401-024-02764-4 (2024)
Neuroinflammatory markers galectin-10 and CTLA-4 track clinical severity, indicating immune activation as a disease-modifying downstream process Tau-triggered glial/immune activation; inflammatory remodeling of CSF proteome In CSF proteomics, galectin-10 and CTLA-4 correlated with PSP Rating Scale scores across cohorts; inflammatory and cytokine-cytokine receptor interaction modules were also identified, supporting ongoing neuroimmune involvement in disease progression (wise2024csfproteomicsin pages 1-2) microglial cell (CL:0000129); astrocyte (CL:0000127); infiltrating immune cell / T cell (CL:0000084 suggestion) CSF-reflective pathology from subthalamic nucleus (UBERON:0001906), globus pallidus (UBERON:0002427), and dorsal midbrain (UBERON:0001891) inflammatory response (GO:0006954); cytokine-mediated signaling pathway (GO:0019221); regulation of immune system process (GO:0002682) 10.1212/WNL.0000000000209585 (2024)

Table: This table summarizes major molecular and cellular mechanisms implicated in progressive supranuclear palsy, linking genetic risk, tau biology, stress signaling, white-matter epigenetics, and neuroinflammation to vulnerable cell types and brain regions. It is useful for knowledge-base annotation because it also suggests ontology terms for cells, anatomy, and biological processes.

Key recent mechanistic developments include: - Single-nucleus RNA-seq (50,708 nuclei) in PSP diencephalon demonstrated EIF2 signaling activation across vulnerable cell types; activated eIF2α correlated with tau burden and localized to p-tau+ neurons and ALDH1L1+ astrocytes by multiplex imaging, supporting integrated stress response failure as a mechanistic component. (whitney2024singlecelltranscriptomicand pages 1-2, whitney2024singlecelltranscriptomicand pages 12-14) - CSF proteomics (SomaScan) identified convergent downregulation of axon guidance and other modules (synaptic/JAK-STAT, vesicle-cytoskeletal trafficking, cytokine signaling) with high AUC discrimination panels, implicating circuit-level dysfunction consistent with axonal/synaptic pathology. (wise2024csfproteomicsin pages 1-2) - A MAPT expression study using RNAscope + AT8 and snRNA-seq found MAPT transcripts in neurons, astrocytes, and oligodendrocytes and preserved expression in cells with tau aggregates, supporting ongoing local tau supply for aggregation/seeding and motivating dual therapeutic approaches. (forrest2023cellspecificmaptgene pages 1-2)


7. Anatomical Structures Affected

PSP pathology and biomarker studies emphasize subcortical and brainstem structures with additional cortical involvement depending on phenotype. Key regions include the subthalamic nucleus, globus pallidus, dorsal midbrain, and cerebellar/diencephalic structures, with clinical variants reflecting differing neuroanatomic distributions of pathology. (wise2024csfproteomicsin pages 1-2, whitney2024singlecelltranscriptomicand pages 1-2)

Cell types prominently implicated include neurons, astrocytes, and oligodendrocytes, consistent across neuropathology, transcriptomics, and genetic findings highlighting oligodendrocyte/myelin biology. (whitney2024singlecelltranscriptomicand pages 1-2, wang2024wholegenomesequencinganalysis pages 1-2)


8. Temporal Development

PSP typically begins after age 60 in many series, with diagnosis often delayed due to early symptom overlap with Parkinson’s disease and other atypical parkinsonisms. (jang2024biomarkerdiscoveryin pages 1-2, hoglinger2017clinicaldiagnosisof pages 2-3)

Real-world data show a multi-year prodrome before diagnosis, with falls and gait impairment commonly preceding formal diagnosis by ~1–2 years (median values among those with onset dates documented). (nysetvold2024progressivesupranuclearpalsy pages 1-2)


9. Inheritance and Population

9.1 Epidemiology

Recent biomarker and review sources report PSP-RS prevalence in the 2.3–10.6 per 100,000 range, with broader PSP prevalence estimates up to ~18 per 100,000 in some population studies. (wise2024csfproteomicsin pages 1-2, boxer2017advancesinprogressive pages 1-2)

9.2 Inheritance

PSP is predominantly sporadic, with rare familial MAPT mutation-associated PSP-like syndromes. MDS criteria incorporate genetic findings into exclusion/context decisions and distinguish inherited vs sporadic PSP when MAPT mutations are present. (hoglinger2017clinicaldiagnosisof pages 3-4, whitney2024singlecelltranscriptomicand pages 1-2)

9.3 Prognosis and natural history


10. Diagnostics

10.1 Clinical criteria (authoritative)

The 2017 Movement Disorder Society (MDS) criteria were developed to improve early and variant-phenotype sensitivity relative to NINDS-SPSP criteria, while maintaining specificity. They incorporate mandatory inclusion/exclusion criteria and define diagnostic certainty categories (probable, possible, suggestive) based on combinations of features across four functional domains. (hoglinger2017clinicaldiagnosisof pages 2-3)

Key excerpted features include: - NINDS-SPSP “probable” PSP requires vertical supranuclear gaze palsy plus postural instability and falls within 1 year, but sensitivity is limited early and for variants. (hoglinger2017clinicaldiagnosisof pages 2-3) - MDS-PSP criteria incorporate imaging/laboratory/genetic context; for example, in PSP-CBS, CSF constellations typical of AD (elevated total/p-tau plus reduced Aβ42) or amyloid PET are used to exclude primary AD pathology. (hoglinger2017clinicaldiagnosisof pages 3-4)

10.2 Biomarkers and imaging (2024 priority)

A structured biomarker summary is provided below.

Table (click to expand)
Biomarker / diagnostic feature Modality / specimen Intended use Key quantitative finding Source (DOI / year)
Neurofilament light chain (NfL) CSF and plasma Prognosis; supportive differential diagnosis NfL concentrations are reported to be 2–5× higher in PSP CSF than in healthy controls and PD; similar plasma elevation reported, but specificity remains limited (jang2024biomarkerdiscoveryin pages 1-2) 10.1186/s12014-024-09507-3 / 2024
CSF p-tau181 CSF Prognosis / disease monitoring Low CSF p-tau181 has been associated with faster clinical progression in PSP, but sensitivity/specificity are limited (wise2024csfproteomicsin pages 1-2) 10.1212/WNL.0000000000209585 / 2024
Axon-guidance protein panel CSF SOMAmer proteomics Diagnostic discrimination Axon-guidance proteins discriminated PSP vs controls with AUC 0.924 (original cohort), 0.815 (validation), and 0.932 (neuropathology-confirmed cohort); top dysregulated pathway across cohorts (wise2024csfproteomicsin pages 1-2) 10.1212/WNL.0000000000209585 / 2024
Galectin-10 (CLC) and CTLA-4 CSF SOMAmer proteomics Severity / progression correlation Two inflammatory proteins, galectin-10 and CTLA-4, correlated with PSP Rating Scale severity across cohorts (wise2024csfproteomicsin pages 1-2) 10.1212/WNL.0000000000209585 / 2024
ATP6AP2 CSF TMT mass-spectrometry proteomics Diagnostic discrimination ATP6AP2 reduced in PSP and had the highest classification performance with AUC 0.922 for PSP vs PD/HC (jang2024biomarkerdiscoveryin pages 1-2) 10.1186/s12014-024-09507-3 / 2024
Additional CSF proteomic candidates CSF TMT mass-spectrometry proteomics Diagnostic panel development Other top candidates included NEFM, EFEMP2, LAMP2, CHST12, FAT2, B4GALT1, LCAT, CBLN3, FSTL5, ATP6AP1, GGH; pathways enriched for cell adhesion, cholesterol metabolism, glycan biosynthesis (jang2024biomarkerdiscoveryin pages 1-2) 10.1186/s12014-024-09507-3 / 2024
Serum p-tau396 Serum ELISA / SIMOA-based pilot biomarker study Clinical staging / severity tracking Of six serum tau species tested, only p-tau396 was detectable; it was higher in PSP and PD vs controls but overlapped between PSP and PD, and strongly correlated with disease severity in PSP (cristiani2024serumtauspecies pages 1-2) 10.3390/diagnostics14232746 / 2024
Serum tau species panel (t-tau, 4R-tau, tau aggregates, p-tau202, p-tau231, p-tau396) Serum Exploratory differential diagnosis Most serum tau species were undetectable or too low for ELISA, arguing against current routine serum tau-species discrimination of PSP vs PD except possible staging value for p-tau396 (cristiani2024serumtauspecies pages 1-2) 10.3390/diagnostics14232746 / 2024
18F-PI-2620 tau-PET Tau PET In vivo tau pathology; diagnostic enrichment; progression staging In probable PSP-RS, subcortical tau uptake was associated with higher NfL and NfL/t-tau, lower GFAP-related ratios, reduced brain volume, and worse executive function; patients showed higher fluid biomarker levels than controls (dilcher2024linkingpi2620taupet pages 1-5) 10.1101/2024.10.14.24315486 / 2024
NfL/t-tau ratio with PI-2620 tau-PET Plasma/CSF + tau PET Trial biomarker / disease monitoring Biomarker ratios showed strong patient-control separation; reported NfL/t-tau 98.9% (95% CI 96.16%–100%) in comparative analysis and correlated with tau-PET burden (dilcher2024linkingpi2620taupet pages 1-5) 10.1101/2024.10.14.24315486 / 2024
MRI midbrain and superior cerebellar peduncle atrophy Structural MRI Supportive diagnosis / differential diagnosis Midbrain and superior cerebellar peduncle atrophy help differentiate PSP-RS; classic “hummingbird” and “morning glory” signs have 100% specificity but limited sensitivity (boxer2017advancesinprogressive pages 4-5) 10.1016/S1474-4422(17)30157-6 / 2017
MRI / imaging supportive findings in MDS criteria Imaging Supportive diagnosis; exclusion of mimics MDS criteria include imaging as supportive and exclusionary context; relevant structural abnormalities and severe leukoencephalopathy are exclusionary, underscoring MRI’s role in ruling out mimics (hoglinger2017clinicaldiagnosisof pages 2-3, hoglinger2017clinicaldiagnosisof pages 3-4) 10.1002/mds.26987 / 2017

Table: This table summarizes key fluid and imaging biomarkers for progressive supranuclear palsy, including diagnostic and prognostic use cases, quantitative findings, and source citations. It is useful for comparing emerging 2024 proteomic and tau-PET markers with established MRI and CSF indicators.

Highlights include: - CSF mass-spectrometry proteomics identified ATP6AP2 as a strong discriminator (AUC 0.922) and enriched pathways (cell adhesion, cholesterol metabolism, glycan biosynthesis). (jang2024biomarkerdiscoveryin pages 1-2) - SomaScan CSF proteomics identified axon-guidance pathway protein panels with AUC up to 0.932 and inflammatory correlates of severity. (wise2024csfproteomicsin pages 1-2) - 18F-PI-2620 tau PET was associated with fluid biomarker ratios and cognition/atrophy in probable PSP-RS (preprint evidence). (dilcher2024linkingpi2620taupet pages 1-5)


11. Outcome / Prognosis

PSP has rapid progression with substantial disability burden and limited disease-modifying options; survival is typically on the order of 5–8 years from symptom onset depending on phenotype and cohort. (dam2021safetyandefficacy pages 1-6, street2021clinicalprogressionof pages 1-2)

Real-world studies show high healthcare utilization, including near-universal medication and imaging use, high assistive-device and supportive-care use, and increasing costs over time. (nysetvold2024progressivesupranuclearpalsy pages 1-2, barer2023progressivesupranuclearpalsy’s pages 1-2)


12. Treatment

12.1 Symptomatic and supportive care (real-world implementation)

Real-world care pathways rely heavily on symptomatic management and supportive services. In a US/Canada medical-record cohort, the most widely used resources (≥85% of participants at some point) were medications (100%), imaging (99%), assistive devices (90%), supportive care (86%), and surgeries/procedures (85%). (nysetvold2024progressivesupranuclearpalsy pages 1-2)

In an Israeli payer-provider cohort, symptomatic therapies listed include levodopa/dopamine agonists/amantadine for motor symptoms (often mild/transient benefit), sleep and ocular symptom treatments, constipation management, antidepressants, and botulinum toxin for selected dystonia/sialorrhea syndromes; multidisciplinary therapy (physical, speech, occupational, social work) is emphasized. (barer2023progressivesupranuclearpalsy’s pages 1-2)

Suggested MAXO terms (labels): monoclonal antibody therapy; fecal microbiota transplantation; physical therapy; speech therapy; occupational therapy; assistive device use; supportive care.

12.2 Disease-modifying and experimental therapies (trials)

A consolidated trial table (including pipeline trials) is provided.

Table (click to expand)
Intervention / study Class / mechanism Trial ID Phase Status Sample size Key endpoint / quantitative result URL Citation
Gosuranemab (PASSPORT) Anti-tau monoclonal antibody targeting N-terminal tau NCT03068468 Phase 2 Completed; open-label extension discontinued after lack of efficacy 486 dosed (321 gosuranemab, 165 placebo) Primary endpoint not met at week 52: adjusted mean PSP Rating Scale (PSPRS) change 10.4 vs 10.6, P=0.85; strong target engagement in CSF unbound N-terminal tau: -98% with gosuranemab vs +11% with placebo; AE and death rates similar between groups https://clinicaltrials.gov/study/NCT03068468 ; https://doi.org/10.1038/s41591-021-01455-x (dam2021safetyandefficacy pages 1-6)
Tilavonemab / ABBV-8E12 (ARISE) Anti-tau monoclonal antibody binding N-terminus of human tau NCT02985879 Phase 2 Terminated early for futility 377 treated / analyzed (126 2000 mg, 125 4000 mg, 126 placebo) Primary endpoint: change in PSPRS at week 52; no benefit vs placebo. Between-group difference vs placebo: 2000 mg 0.0 (95% CI -2.6 to 2.6), p>0.99; 4000 mg 1.0 (95% CI -1.6 to 3.6), p=0.46; similar safety profile across groups https://clinicaltrials.gov/study/NCT02985879 ; https://doi.org/10.1016/S1474-4422(20)30489-0 (hoglinger2021safetyandefficacy pages 1-2, hoglinger2021safetyandefficacy pages 6-7)
Faecal microbiota transplantation (FMT) in PSP-RS Microbiome-directed therapy / fecal microbiota transplantation ChiCTR-2100045397 Phase 2 Completed 68 randomized Primary outcome at week 16: PSPRS improved from 40.1 to 36.9 in FMT group vs 40.1 to 41.7 in placebo; treatment benefit 4.3 (95% CI 3.2-5.4), P<0.0001; also improved constipation, depression, and anxiety https://www.chictr.org.cn/showproj.html?proj=124265 ; https://doi.org/10.1016/j.eclinm.2023.101888 (tian2023efficacyoffaecal pages 1-2)
NIO752 Investigational disease-modifying therapy for PSP (mechanism not specified in retrieved trial context) NCT07498426 Phase 3 Recruiting 300 planned Efficacy study in PSP; primary endpoint not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT07498426 (OpenTargets Search: Progressive supranuclear palsy)
AADvac1 Active tau immunotherapy / anti-tau vaccine NCT07217665 Phase 2 Not yet recruiting 146 planned PSP platform trial regimen A; endpoint not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT07217665 (OpenTargets Search: Progressive supranuclear palsy, boxer2017advancesinprogressive pages 8-9)
LM11A-31 Small-molecule neuroprotective candidate (p75NTR modulator; mechanism not detailed in retrieved context) NCT07264283 Phase 2 Not yet recruiting 147 planned PSP platform trial regimen B; endpoint not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT07264283 (OpenTargets Search: Progressive supranuclear palsy)
FNP-223 Investigational disease-modifying therapy for PSP NCT06355531 Phase 2 Active, not recruiting 241 planned Study to assess efficacy, safety, and pharmacokinetics to slow PSP progression; primary endpoint not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT06355531 (OpenTargets Search: Progressive supranuclear palsy)
Syde® digital endpoints study Digital monitoring / observational endpoint feasibility study NCT07389018 Observational Not yet recruiting 30 planned Feasibility of digital endpoints for monitoring PSP-Richardson syndrome https://clinicaltrials.gov/study/NCT07389018 (OpenTargets Search: Progressive supranuclear palsy)
Art therapy in PSP Supportive / non-pharmacologic intervention NCT06588673 Not applicable Active, not recruiting 10 planned Interventional supportive-care study; endpoint not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT06588673 (OpenTargets Search: Progressive supranuclear palsy)
GV1001 subcutaneous Investigational peptide therapy NCT05819658 Phase 2 Completed 78 planned Treatment study in PSP; endpoint/results not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT05819658 (OpenTargets Search: Progressive supranuclear palsy)
GV1001 extension Extension study for prior GV1001 PSP trial completers NCT06235775 Phase 2 Completed 67 planned Extension study; endpoint/results not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT06235775 (OpenTargets Search: Progressive supranuclear palsy)
TPN-101 Investigational therapy NCT04993768 Phase 2a Completed 42 planned Phase 2a study in PSP; endpoint/results not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT04993768 (OpenTargets Search: Progressive supranuclear palsy)
RT001 Investigational therapy NCT04937530 Phase 2 Unknown 40 planned PSP treatment study; endpoint/results not provided in retrieved trial summary https://clinicaltrials.gov/study/NCT04937530 (OpenTargets Search: Progressive supranuclear palsy)
Real-world care utilization cohort (US/Canada) Retrospective observational real-world management study Not a trial Observational Published 72 Median onset before diagnosis: first fall 2.0 years, unsteady gait/gait impairment 1.2 years, mobility problems 0.8 years; healthcare resources used at some point: medications 100%, imaging 99%, assistive devices 90%, supportive care 86%, surgeries/procedures 85% https://doi.org/10.1186/s13023-024-03168-z (nysetvold2024progressivesupranuclearpalsy pages 1-2, nysetvold2024progressivesupranuclearpalsy pages 2-4)
Real-world economic burden cohort (Israel) Retrospective healthcare utilization / cost study Not a trial Observational Published 88 PSP, 264 matched controls Annual direct costs rose from US$8,910 in year before diagnosis to US$21,637 in year 5 and US$36,693 in year 10; costs about 2-fold higher than controls in year prior diagnosis and ~1.5-fold higher in year after diagnosis https://doi.org/10.1007/s00415-023-11714-1 (barer2023progressivesupranuclearpalsy’s pages 1-2, barer2023progressivesupranuclearpalsy’s pages 4-5)

Table: This table summarizes interventional PSP studies with reported outcomes, active pipeline trials from retrieved ClinicalTrials.gov results, and real-world management/cost studies. It is useful for quickly comparing therapeutic classes, trial status, quantitative efficacy signals, and care burden.

Key completed disease-modifying trial outcomes: - Gosuranemab (NCT03068468): no clinical benefit (PSPRS change 10.4 vs 10.6 at week 52; P=0.85) despite strong CSF N-terminal tau target engagement (-98%). (dam2021safetyandefficacy pages 1-6) - Tilavonemab/ABBV-8E12 (NCT02985879): terminated for futility; no PSPRS benefit at week 52 vs placebo. (hoglinger2021safetyandefficacy pages 1-2)

Notable 2023–2024 development: - FMT in PSP-RS (ChiCTR-2100045397): phase 2 single-center trial showed improvement in PSPRS at week 16 and sustained nonmotor symptom improvements, providing a provocative but as-yet single-center signal requiring replication. (tian2023efficacyoffaecal pages 1-2)


13. Prevention

No primary prevention or proven protective factors were identified in the retrieved evidence set. Current best-supported “prevention” is tertiary: reducing falls and aspiration risk, managing dysphagia/constipation/mood symptoms, and implementing assistive devices and supportive therapies early. (nysetvold2024progressivesupranuclearpalsy pages 1-2, barer2023progressivesupranuclearpalsy’s pages 1-2)

Earlier detection is being advanced via MDS criteria adoption and emerging biomarkers (CSF proteomic panels, tau PET, NfL-based staging/prognosis). (hoglinger2017clinicaldiagnosisof pages 2-3, wise2024csfproteomicsin pages 1-2)


14. Other Species / Natural Disease

No naturally occurring PSP-equivalent disease in non-human species was identified in the retrieved sources for this run.


15. Model Organisms and Experimental Models (2023–2024)

A major current limitation is that conventional iPSC-derived neurons express low 4R tau, hindering modeling of 4R tauopathies such as PSP. A 2024 Cell study reports engineered hiPSC-derived neuronal lines expressing 4R tau (and 4R P301S) that develop progressive tau inclusions after seeding and enable CRISPRi screens identifying modifiers of tau propagation, supporting human-relevant target discovery platforms. (bravo2024humanipsc4r pages 1-3)

Human tissue-based mechanistic mapping supports glial involvement: MAPT transcripts were detected and preserved in neurons, astrocytes, and oligodendrocytes with tau aggregates in PSP, motivating combined approaches (reduce MAPT expression plus remove misfolded tau). (forrest2023cellspecificmaptgene pages 1-2)


Expert opinion / analysis (authoritative synthesis)

Two overarching themes emerge from authoritative and recent sources: 1) PSP is best conceptualized as a spectrum of clinical phenotypes underpinned by a shared 4R tau neuropathology; therefore, diagnostic frameworks and biomarkers must capture early and variant presentations rather than only PSP-RS. This is the central rationale of the 2017 MDS criteria revision. (hoglinger2017clinicaldiagnosisof pages 2-3, boxer2017advancesinprogressive pages 1-2) 2) The lack of clinical efficacy in anti-tau antibody trials despite strong CSF target engagement implies that either the targeted tau species/compartment is not causally dominant, the intervention timing is too late, or pharmacology does not adequately address intracellular pathology and downstream stress/inflammatory cascades. This motivates: (i) better pharmacodynamic and disease-biology biomarkers, and (ii) multi-target approaches addressing upstream splicing/expression (MAPT), intracellular proteostasis/ISR, and neuroimmune pathways. (dam2021safetyandefficacy pages 1-6, whitney2024singlecelltranscriptomicand pages 1-2, wise2024csfproteomicsin pages 1-2)


Key statistics (recent and high-value)


Limitations of this report (data availability)

  • OMIM, MeSH, ICD-10, and Orphanet numeric identifiers were not explicitly retrievable in the provided texts beyond MONDO and Orphanet subtype labels surfaced via OpenTargets.
  • Variant-level details (ClinVar classifications, allele frequencies) and PSP-specific environmental risk/protective factors were not captured in this retrieval.
  • Some biomarker and imaging findings (e.g., PI-2620 tau PET linkage) were available as preprint evidence.

References

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  2. (wise2024csfproteomicsin pages 1-2): Amy Wise, Jingyao Li, Mai Yamakawa, Joseph Loureiro, Brant Peterson, Kathleen Worringer, Rajeev Sivasankaran, Jose-Alberto Palma, Laura Mitic, Hilary W. Heuer, Argentina Lario-Lago, Adam M. Staffaroni, Annie Clark, Jack Taylor, Peter A. Ljubenkov, Lawren Vandevrede, Lea T. Grinberg, Salvatore Spina, William W. Seeley, Bruce L. Miller, Bradley F. Boeve, Bradford C. Dickerson, Murray Grossman, Irene Litvan, Alexander Pantelyat, Maria Carmela Tartaglia, Zihan Zhang, Anne-Marie A. Wills, Jessica Rexach, Julio C. Rojas, and Adam L. Boxer. Csf proteomics in patients with progressive supranuclear palsy. Neurology, Aug 2024. URL: https://doi.org/10.1212/wnl.0000000000209585, doi:10.1212/wnl.0000000000209585. This article has 15 citations and is from a highest quality peer-reviewed journal.

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