Evidence map›Paper›PMID 32213628›Full record

ArticleScience translational medicine2020

An ocular glymphatic clearance system removes β-amyloid from the rodent eye.

Xiaowei Wang, Nanhong Lou, Allison Eberhardt, Yujia Yang, Peter Kusk, Qiwu Xu, Benjamin Förstera, Sisi Peng, Meng Shi, Antonio Ladrón-de-Guevara and 8 more

Open access · greenAbstract read
In one paragraph

Article in Science translational medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed, 1 pooled it
11.4field-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

136 citing papers in PubMed, 1 synthesis or guideline pooled it, 223 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Observational
  8. Review
  9. Review
  10. Ocular Lymphatics in Health and Disease.Diagnostics (Basel, Switzerland) · 2026
    Review
  11. Article
  12. Ocular Glymphatic System: Its Modulation and Role in Intraocular Tumors.Investigative ophthalmology & visual science · 2026
    Review
  13. Review
  14. Article
  15. Article
  16. Ocular Solute Movement Direction and Intracranial Clearance via Vitreous Gadolinium-based Contrast Agent MR Imaging: Potential as a Novel Biomarker for Glymphatic Dysfunction.Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine · 2026
    Article
  17. Discovery of Abundant Nano-scale Lymphatic-like Vessels in Brains.bioRxiv : the preprint server for biology · 2026
    Article
  18. Article
  19. Review
  20. Review

76 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

18 authors at 4 institutions in 4 countries.

Xiaowei WangCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.ORCID 0000-0002-5175-7623
Nanhong LouCenter for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.
Allison EberhardtCenter for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.
Yujia YangCenter for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA.ORCID 0000-0002-9130-7619
Peter KuskCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.
Qiwu XuCenter for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.ORCID 0000-0003-2236-8415
Benjamin FörsteraInstitute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig Maximilians University of Munich (LMU), 81377 Munich, Germany.ORCID 0000-0002-5913-0016
Sisi PengCenter for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.ORCID 0000-0003-4052-5904
Meng ShiCenter for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA.ORCID 0000-0002-9716-0240
Antonio Ladrón-de-GuevaraCenter for Translational Neuromedicine, University of Rochester Medical School, Elmwood Avenue 601, Rochester, NY 14642, USA.ORCID 0000-0003-1093-2509
Christine DelleCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.ORCID 0000-0003-2910-0024
Björn SigurdssonCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.ORCID 0000-0002-7484-7779
Anna L R XavierCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.ORCID 0000-0001-5143-6531
Ali ErtürkInstitute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig Maximilians University of Munich (LMU), 81377 Munich, Germany.
Richard T LibbyDepartment of Ophthalmology, University of Rochester Medical Center, Rochester, NY 14642, USA.ORCID 0000-0003-2844-7632
Lu ChenCenter for Eye Disease and Development, Vision Science Graduate Program, and School of Optometry, University of California Berkeley, Berkeley, CA 94720, USA. nedergaard@sund.ku.dk chenlu@berkeley.edu.ORCID 0000-0002-1421-4056
Alexander S ThraneCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark.ORCID 0000-0001-5646-1111
Maiken NedergaardCenter for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen N, Denmark. nedergaard@sund.ku.dk chenlu@berkeley.edu.ORCID 0000-0002-9254-5360
University of Copenhagen · DKUniversity of Rochester Medical Center · USBerkeley Eye Center · USHelmholtz Zentrum München · DE

Funding

Para-Vascular Basis of Small Vessel DiseaseR01NS100366 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2016 to 2020
$3.8M
Research Supplement for Kennelia MellansonRF1AG057705 · NIA · STATE UNIVERSITY NEW YORK STONY BROOK · PI BENVENISTE, HELENE D, ENIKOLOPOV, GRIGORI N · 2017 to 2021
$3.7M
Characterizing the glymphatic peri-vascular connectome and its disruption in ADRF1AG053991 · NIA · YALE UNIVERSITY · PI BENVENISTE, HELENE D, NEDERGAARD, MAIKEN · 2016 to 2016
$3.4M
Age and AD related bottlenecks in glymphatic-lymphatic waste transportRF1AG057575 · NIA · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2017 to 2017
$3.2M
Capillary hyperemia in white matter: Novel mechanistic insight and effect of hypertension and agingRF1NS110049 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN, WAN, JIANDI · 2018 to 2018
$2.9M
Novel characterization and therapeutic intervention of Schlemm's canal for glaucoma treatmentR01EY028995 · NEI · UNIVERSITY OF CALIFORNIA BERKELEY · PI CHEN, LU · 2018 to 2021
$1.6M
NEI NIH HHS R01 EY028995NIA NIH HHS RF1 AG053991NIA NIH HHS RF1 AG057575NIA NIH HHS RF1 AG057705NINDS NIH HHS R01 NS100366NINDS NIH HHS RF1 NS110049
6 · The paper itself

Abstract

Despite high metabolic activity, the retina and optic nerve head lack traditional lymphatic drainage. We here identified an ocular glymphatic clearance route for fluid and wastes via the proximal optic nerve in rodents. β-amyloid (Aβ) was cleared from the retina and vitreous via a pathway dependent on glial water channel aquaporin-4 (AQP4) and driven by the ocular-cranial pressure difference. After traversing the lamina barrier, intra-axonal Aβ was cleared via the perivenous space and subsequently drained to lymphatic vessels. Light-induced pupil constriction enhanced efflux, whereas atropine or raising intracranial pressure blocked efflux. In two distinct murine models of glaucoma, Aβ leaked from the eye via defects in the lamina barrier instead of directional axonal efflux. The results suggest that, in rodents, the removal of fluid and metabolites from the intraocular space occurs through a glymphatic pathway that might be impaired in glaucoma.

Indexed as

Glymphatic SystemAmyloid beta-PeptidesAnimalsAquaporin 4Intracranial PressureMiceOptic NerveRetinaVitreous BodyAmyloid beta-PeptidesAqp4 protein, mouseAquaporin 4

Identifiers

PMID32213628
PMCPMC7356596
OpenAlexW3013081630

What OpenQuestion holds

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Read underepoch 390

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.