Evidence map›Paper›PMID 35212707›Full record

ArticleThe Journal of experimental medicine2022

Glymphatic system clears extracellular tau and protects from tau aggregation and neurodegeneration.

Kazuhisa Ishida, Kaoru Yamada, Risa Nishiyama, Tadafumi Hashimoto, Itaru Nishida, Yoichiro Abe, Masato Yasui, Takeshi Iwatsubo

Open access · greenAbstract read
In one paragraph

Article in The Journal of experimental medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 175 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
175citing papers in PubMed, 3 pooled it
22.1field-weighted citation impact, top 1% 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

175 citing papers in PubMed, 3 syntheses or guidelines pooled it, 242 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Meta-analysis of the relationship between the number and location of perivascular spaces in the brain and cognitive function.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Pooled it
  4. Trial
  5. Article
  6. Article
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  8. Review
  9. Shared genetic architecture between DTI-ALPS traits and neurodegenerative diseases.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  10. Review
  11. Review
  12. Review
  13. Dorsal raphe tau pathology disrupts sleep-wake orchestration and sleep architecture in a sex-specific manner.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  14. Lung endothelial cytopathic tau is sufficient to impair long-term potentiation during infection.American journal of respiratory cell and molecular biology · 2026
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Review
  20. Review

115 more citing papers are in PubMed but not listed here.

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

8 authors at 3 institutions in 1 country.

Kazuhisa Ishida *Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0002-5120-4586
Kaoru Yamada *Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0003-3696-0604
Risa NishiyamaDepartment of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0002-7379-6324
Tadafumi HashimotoDepartment of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0001-5442-4800
Itaru NishidaDepartment of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0003-2484-7356
Yoichiro AbeDepartment of Pharmacology, Keio University School of Medicine, Tokyo, Japan.ORCID 0000-0001-6163-8794
Masato YasuiDepartment of Pharmacology, Keio University School of Medicine, Tokyo, Japan.ORCID 0000-0002-5481-1779
Takeshi IwatsuboDepartment of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.ORCID 0000-0003-1160-8129
The University of Tokyo · JPKeio University · JPNational Center of Neurology and Psychiatry · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Accumulation of tau has been implicated in various neurodegenerative diseases termed tauopathies. Tau is a microtubule-associated protein but is also actively released into the extracellular fluids including brain interstitial fluid and cerebrospinal fluid (CSF). However, it remains elusive whether clearance of extracellular tau impacts tau-associated neurodegeneration. Here, we show that aquaporin-4 (AQP4), a major driver of the glymphatic clearance system, facilitates the elimination of extracellular tau from the brain to CSF and subsequently to deep cervical lymph nodes. Strikingly, deletion of AQP4 not only elevated tau in CSF but also markedly exacerbated phosphorylated tau deposition and the associated neurodegeneration in the brains of transgenic mice expressing P301S mutant tau. The current study identified the clearance pathway of extracellular tau in the central nervous system, suggesting that glymphatic clearance of extracellular tau is a novel regulatory mechanism whose impairment contributes to tau aggregation and neurodegeneration.

Indexed as

AnimalsAquaporin 4BrainExtracellular FluidFemaleGlymphatic SystemMaleMiceMice, Inbred C57BLMice, KnockoutMice, TransgenicMutant ProteinsNerve DegenerationProtein Aggregation, Pathologicaltau ProteinsAqp4 protein, mouseAquaporin 4Mapt protein, mouseMutant Proteinstau Proteins

Identifiers

PMID35212707
PMCPMC8932543
OpenAlexW4214574386

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
Read underepoch 390

Registered trials

None linked

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.