Evidence map›Paper›PMID 32999319›Full record

ArticleScientific reports2020

Biological sex does not predict glymphatic influx in healthy young, middle aged or old mice.

Michael Giannetto, Maosheng Xia, Frederik Filip Stæger, Tanner Metcalfe, Hanna S Vinitsky, Juliana A M L Dang, Anna L R Xavier, Benjamin T Kress, Maiken Nedergaard, Lauren M Hablitz

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 14% 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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 55 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Advancements in Therapy for Alzheimer's Disease Based on the Cerebral Lymphatic System.Degenerative neurological and neuromuscular disease · 2026
    Article
  10. Article
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  12. Cerebrospinal fluid flow modulates brain health.The Journal of clinical investigation · 2025
    Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Loss of glymphatic homeostasis in heart failure.Brain : a journal of neurology · 2025
    Article
  20. Review
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

10 authors at 3 institutions in 3 countries.

Michael GiannettoCenter for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
Maosheng XiaLaboratory of Brain Metabolic Diseases, Institute of Metabolic Disease Research and Drug Development, China Medical University, No. 77, Puhe Street, Shenbei District, Shenyang, 110177, People's Republic of China.
Frederik Filip StægerCenter for Basic and Translational Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark.
Tanner MetcalfeCenter for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
Hanna S VinitskyCenter for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
Juliana A M L DangCenter for Basic and Translational Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark.
Anna L R XavierCenter for Basic and Translational Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark.
Benjamin T KressCenter for Basic and Translational Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark.
Maiken NedergaardCenter for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA. Nedergaard@urmc.rochester.edu.
Lauren M HablitzCenter for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, 14642, USA.
University of Copenhagen · DKUniversity of Rochester Medical Center · USFirst Hospital of China Medical University · CN

Funding

Para-Vascular Basis of Small Vessel DiseaseR01NS100366 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2016 to 2020
$3.8M
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
NIA NIH HHS RF1 AG057575NINDS NIH HHS R01 NS100366NINDS NIH HHS RF1 NS110049
6 · The paper itself

Abstract

Sexual dimorphism is evident in brain structure, size, and function throughout multiple species. Here, we tested whether cerebrospinal fluid entry into the glymphatic system, a network of perivascular fluid transport that clears metabolic waste from the brain, was altered between male and female mice. We analyze glymphatic influx in 244 young reproductive age (2-4 months) C57BL/6 mice. We found no male/female differences in total influx under anesthesia, or across the anterior/posterior axis of the brain. Circadian-dependent changes in glymphatic influx under ketamine/xylazine anesthesia were not altered by sex. This was not true for diurnal rhythms under pentobarbital and avertin, but both still showed daily oscillations independent of biological sex. Finally, although glymphatic influx decreases with age there was no sex difference in total influx or subregion-dependent tracer distribution in 17 middle aged (9-10 months) and 36 old (22-24 months) mice. Overall, in healthy adult C57BL/6 mice we could not detect male/female differences in glymphatic influx. This finding contrasts the gender differences in common neurodegenerative diseases. We propose that additional sex-dependent co-morbidities, such as chronic stress, protein misfolding, traumatic brain injury or other pathological mechanisms may explain the increased risk for developing proteinopathies rather than pre-existing suppression of glymphatic influx.

Indexed as

AgingAnesthesiaAnimalsBrainCerebrospinal FluidCircadian RhythmFemaleGlymphatic SystemMaleMiceMice, Inbred C57BLMicroscopy, FluorescenceSex Characteristics

Identifiers

PMID32999319
PMCPMC7528110
OpenAlexW3091230161

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.