Evidence map›Paper›PMID 35317823›Full record

ReviewFluids and barriers of the CNS2022

Cerebrospinal fluid production by the choroid plexus: a century of barrier research revisited.

Nanna MacAulay, Richard F Keep, Thomas Zeuthen

Open access · goldAbstract readReview
In one paragraph

Review in Fluids and barriers of the CNS, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 98 papers.

0numbers the graph read from it
0cells of the map it votes in
98citing papers in PubMed
12.2field-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

98 citing papers in PubMed, 148 citations in OpenAlex.

  1. Article
  2. Article
  3. The glymphatic system and Parkinson's disease: a narrative review.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Review
  4. Simultaneous measurement of water transport across the blood-brain and blood-CSF barrier in the human brain with arterial spin labeling MRI.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2026
    Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Observational
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Review
  20. Review

38 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

3 authors at 2 institutions in 2 countries.

Nanna MacAulayDepartment of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark. macaulay@sund.ku.dk.
Richard F KeepDepartment of Neurosurgery, University of Michigan, Ann Arbor, MI, USA.
Thomas ZeuthenDepartment of Neuroscience, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen, Denmark.
University of Copenhagen · DKUniversity of Michigan–Ann Arbor · US

Funding

Carlsbergfondet CF19-0056Danmarks Frie Forskningsfond 0602-02344BLundbeckfonden R276-2018-403Novo Nordisk Fonden NNF17OC0024718
6 · The paper itself

Abstract

Cerebrospinal fluid (CSF) envelops the brain and fills the central ventricles. This fluid is continuously replenished by net fluid extraction from the vasculature by the secretory action of the choroid plexus epithelium residing in each of the four ventricles. We have known about these processes for more than a century, and yet the molecular mechanisms supporting this fluid secretion remain unresolved. The choroid plexus epithelium secretes its fluid in the absence of a trans-epithelial osmotic gradient, and, in addition, has an inherent ability to secrete CSF against an osmotic gradient. This paradoxical feature is shared with other 'leaky' epithelia. The assumptions underlying the classical standing gradient hypothesis await experimental support and appear to not suffice as an explanation of CSF secretion. Here, we suggest that the elusive local hyperosmotic compartment resides within the membrane transport proteins themselves. In this manner, the battery of plasma membrane transporters expressed in choroid plexus are proposed to sustain the choroidal CSF secretion independently of the prevailing bulk osmotic gradient.

Indexed as

Choroid PlexusMembrane Transport ProteinsBiological TransportEpitheliumMembrane Transport ProteinsBlood-CSF-barrierCerebrospinal fluidChoroid plexusCSFLocal osmotic forcesMembrane transportersOsmotic gradientsTransporter-mediated water transport

Identifiers

PMID35317823
PMCPMC8941821
OpenAlexW4220701458

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.