Evidence map›Paper›PMID 25947369›Full record

ReviewNeurochemical research2015

The Glymphatic System: A Beginner's Guide.

Nadia Aalling Jessen, Anne Sofie Finmann Munk, Iben Lundgaard, Maiken Nedergaard

2 registry-linked trialsAbstract readReview
In one paragraph

Review in Neurochemical research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 1,073 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
1,073citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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.

NCT03410095 unknown statusnot on this mapstarted 2018, after this paper: background citation

The Brain Changes in Sleep Apnea Study

Typeobservational_patient_registrySponsorDr. Andrew LimRan2018 to 2022Enrolled80ConditionsSleep, Sleep Apnea, Sleep Apnea SyndromesArmsBrain MRI, cognitive testing, bloodwork
NCT06857136 completednot on this mapstarted 2021, after this paper: background citation

The Role of the Glymphatic System Avaluated Thourgh mr Imaging in the Diagnosis and Management of NPH

TypeobservationalSponsorFondazione I.R.C.C.S. Istituto Neurologico Carlo BestaRan2021 to 2024Enrolled29ConditionsHydrocephalus, Normal Pressure Hydrocephalus
3 · Its place in the literature

Who cites it

1,073 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  10. Associations Between Measures of Sleep Health and Cognitive Function in Older Adults.medRxiv : the preprint server for health sciences · 2026
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1,013 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

4 authors.

Nadia Aalling JessenSchool of Medicine and Dentistry, University of Rochester Medical Center, 601 Elmwood Ave, Box 645, Rochester, NY, 14642, USA. Nadia_Aalling@urmc.rochester.edu.ORCID http://orcid.org/0000-0001-6995-1590
Anne Sofie Finmann MunkSchool of Medicine and Dentistry, University of Rochester Medical Center, 601 Elmwood Ave, Box 645, Rochester, NY, 14642, USA.
Iben LundgaardSchool of Medicine and Dentistry, University of Rochester Medical Center, 601 Elmwood Ave, Box 645, Rochester, NY, 14642, USA.
Maiken NedergaardSchool of Medicine and Dentistry, University of Rochester Medical Center, 601 Elmwood Ave, Box 645, Rochester, NY, 14642, USA.

Funding

Failure of metabolite clearance in a model of multi-lacunar infarctsR01NS078167 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.8M
The glymphatic system, a new concept in glia biologyR01NS078304 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.7M
ATP as the instigator of inflammatory responses to spinal cord injuryR01NS075177 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.6M
Glymphatic function in a transgenic rat model of Alzheimer's diseaseR01AG048769 · NIA · UNIVERSITY OF ROCHESTER · PI BENVENISTE, HELENE D, NEDERGAARD, MAIKEN · 2014 to 2018
$1.4M
Metabolic profiling of neonatal anesthesia toxicityR21HD080573 · NICHD · STATE UNIVERSITY NEW YORK STONY BROOK · PI BENVENISTE, HELENE D, NEDERGAARD, MAIKEN · 2014 to 2015
$441k
NIA NIH HHS R01 AG048769NICHD NIH HHS R21 HD080573NINDS NIH HHS NS075177NINDS NIH HHS NS078304NINDS NIH HHS R01 NS075177NINDS NIH HHS R01 NS078167NINDS NIH HHS R01 NS078304
6 · The paper itself

Abstract

The glymphatic system is a recently discovered macroscopic waste clearance system that utilizes a unique system of perivascular tunnels, formed by astroglial cells, to promote efficient elimination of soluble proteins and metabolites from the central nervous system. Besides waste elimination, the glymphatic system also facilitates  brain-wide distribution of several compounds, including glucose, lipids, amino acids, growth factors, and neuromodulators. Intriguingly, the glymphatic system function mainly during sleep and is largely disengaged during wakefulness. The biological need for sleep across all species may therefore reflect that the brain must enter a state of activity that enables elimination of potentially neurotoxic waste products, including β-amyloid. Since the concept of the glymphatic system is relatively new, we will here review its basic structural elements, organization, regulation, and functions. We will also discuss recent studies indicating that glymphatic function is suppressed in various diseases and that failure of glymphatic function in turn might contribute to pathology in neurodegenerative disorders, traumatic brain injury and stroke.

Indexed as

AgingAnimalsAstrocytesBrain InjuriesCerebrospinal FluidHumansLymphatic SystemAgingAstrocytesCerebrospinal fluid secretionNeurodegenerative diseasesPerivascular spacesSleepThe glymphatic systemTraumatic brain injuryVirchow–Robin spaces

Identifiers

PMID25947369
PMCPMC4636982

What OpenQuestion holds

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Read underepoch 390

Registered trials

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.