Evidence map›Paper›PMID 33459640›Full record

ArticleJournal of Alzheimer's disease : JAD2021

Molecular Processing of Tau Protein in Progressive Supranuclear Palsy: Neuronal and Glial Degeneration.

Alejandra Martínez-Maldonado, Miguel Ángel Ontiveros-Torres, Charles R Harrington, José Francisco Montiel-Sosa, Raúl García-Tapia Prandiz, Patricia Bocanegra-López, Andrew Michael Sorsby-Vargas, Marely Bravo-Muñoz, Benjamín Florán-Garduño, Ignacio Villanueva-Fierro and 6 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of Alzheimer's disease : JAD, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
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  5. Article
  6. Review
  7. Brain Networks Route Neurodegeneration Patterns in Patients with Progressive Supranuclear Palsy.Movement disorders : official journal of the Movement Disorder Society · 2025
    Article
  8. Article
  9. Differences in the soluble and insoluble proteome between primary tauopathies.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  10. Review
  11. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

16 authors at 8 institutions in 4 countries.

Alejandra Martínez-MaldonadoDepartamento de Fisiología Biofísica y Neurociencias, CINVESTAV, México City, México.
Miguel Ángel Ontiveros-TorresTecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Toluca, Estado de México.
Charles R HarringtonSchool of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK.
José Francisco Montiel-SosaNational Dementia BioBank, Ciencias Biológicas, Facultad de Estudios Superiores, Cuautitlán, UNAM, Estado de México, México.
Raúl García-Tapia PrandizFacultad de Ciencias de la Salud, Universidad Anáhuac México Norte, México.
Patricia Bocanegra-LópezFacultad de Ciencias de la Salud, Universidad Anáhuac México Norte, México.
Andrew Michael Sorsby-VargasFacultad de Ciencias de la Salud, Universidad Anáhuac México Norte, México.
Marely Bravo-MuñozNational Dementia BioBank, Ciencias Biológicas, Facultad de Estudios Superiores, Cuautitlán, UNAM, Estado de México, México.
Benjamín Florán-GarduñoDepartamento de Fisiología Biofísica y Neurociencias, CINVESTAV, México City, México.
Ignacio Villanueva-FierroCIIDIR, Durango, Instituto Politécnico Nacional, Durango, Becario COFAA, México.
George PerryCollege of Sciences, University of Texas at San Antonio, San Antonio, TX, USA.
Linda Garcés-RamírezEscuela Nacional de Ciencias Biológicas, Depto. Fisiología, Instituto Politécnico Nacional, CDMX, México.
Fidel de la CruzEscuela Nacional de Ciencias Biológicas, Depto. Fisiología, Instituto Politécnico Nacional, CDMX, México.
Sandra Martínez-RoblesNational Dementia BioBank, Ciencias Biológicas, Facultad de Estudios Superiores, Cuautitlán, UNAM, Estado de México, México.
Mar Pacheco-HerreroNeuroscience Research Laboratory, Faculty of Health Sciences, Pontificia Universidad Catolica Madre y Maestra, Santiago de los Caballeros, República Dominicana.
José Luna-MuñozNational Dementia BioBank, Ciencias Biológicas, Facultad de Estudios Superiores, Cuautitlán, UNAM, Estado de México, México.
Universidad Anáhuac · MXInstituto Politécnico Nacional · MXCentro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional · MXPontificia Universidad Católica Madre y Maestra · DOTecnológico de Monterrey · MXThe University of Texas at San Antonio · USUniversidad Nacional Pedro Henríquez Ureña · DOUniversity of Aberdeen · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlzheimer's disease (AD) and progressive supranuclear palsy (PSP) are examples of neurodegenerative diseases, characterized by abnormal tau inclusions, that are called tauopathies. AD is characterized by highly insoluble paired helical filaments (PHFs) composed of tau with abnormal post-translational modifications. PSP is a neurodegenerative disease with pathological and clinical heterogeneity. There are six tau isoforms expressed in the adult human brain, with repeated microtubule-binding domains of three (3R) or four (4R) repeats. In AD, the 4R:3R ratio is 1:1. In PSP, the 4R isoform predominates. The lesions in PSP brains contain phosphorylated tau aggregates in both neurons and glial cells.

objectiveOur objective was to evaluate and compare the processing of pathological tau in PSP and AD.

methodsDouble and triple immunofluorescent labeling with antibodies to specific post-translational tau modifications (phosphorylation, truncation, and conformational changes) and thiazin red (TR) staining were carried out and analyzed by confocal microscopy.

resultsOur results showed that PSP was characterized by phosphorylated tau in neurofibrillary tangles (NFTs) and glial cells. Tau truncated at either Glu391 or Asp421 was not observed. Extracellular NFTs (eNFTs) and glial cells in PSP exhibited a strong affinity for TR in the absence of intact or phosphorylated tau.

conclusionPhosphorylated tau was as abundant in PSP as in AD. The development of eNFTs from both glial cells and neuronal bodies suggests that truncated tau species, different from those observed in AD, could be present in PSP. Additional studies on truncated tau within PSP lesions could improve our understanding of the pathological processing of tau and help identify a discriminatory biomarker for AD and PSP.

Indexed as

Alzheimer DiseaseHumansNeurofibrillary TanglesNeurogliaNeuronsSupranuclear Palsy, Progressivetau ProteinsMAPT protein, humantau ProteinsAlzheimer’s diseaseneurofibrillary tangleprogressive supranuclear palsytau proteintruncation

Identifiers

PMID33459640
PMCPMC7990452
OpenAlexW3118899566

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.