Evidence map›Paper›PMID 25818565›Full record

ReviewCold Spring Harbor perspectives in biology2015

Astrocyte regulation of blood flow in the brain.

Brian A MacVicar, Eric A Newman

Open access · bronzeAbstract readReview
In one paragraph

Review in Cold Spring Harbor perspectives in biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 227 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
227citing papers in PubMed, 1 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.

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

227 citing papers in PubMed, 1 synthesis or guideline pooled it, 403 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Cell-to-Cell Signaling Networks at the Blood-Brain Barrier in Health and Disease.Arteriosclerosis, thrombosis, and vascular biology · 2026
    Review
  4. Article
  5. Review
  6. The Roles of EETs in Neurological Disorders.CNS neuroscience & therapeutics · 2026
    Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Review
  12. Review
  13. Review
  14. Article
  15. Review
  16. Review
  17. Astrocyte Reactivity by Alcohol Dependence in the Central Amygdala.bioRxiv : the preprint server for biology · 2026
    Article
  18. Article
  19. Stretch and flow at the gliovascular interface: High-fidelity modeling of astrocyte endfeet.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  20. Article

167 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

2 authors at 2 institutions in 2 countries.

Brian A MacVicarDjavad Mowafaghian Centre for Brain Health, Department of Psychiatry, University of British Columbia, Vancouver, British Columbia V6T 2B5, Canada.
Eric A NewmanDepartment of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455.
University of British Columbia · CAUniversity of Minnesota · US

Funding

Visual TestingP30EY011374 · NEI · UNIVERSITY OF MINNESOTA TWIN CITIES · PI NEWMAN, ERIC A · 1996 to 2019
$8.8M
PHYSIOLOGY OF RETINAL MULLER CELLS AND ASTROCYTESR01EY004077 · NEI · UNIVERSITY OF MINNESOTA TWIN CITIES · PI NEWMAN, ERIC A · 1985 to 2013
$5.7M
Dark adaptation and hypoxia in diabetic retinopathyR21EY023216 · NEI · UNIVERSITY OF MINNESOTA · PI NEWMAN, ERIC A · 2013 to 2014
$414k
Canadian Institutes of Health Research 244825Canadian Institutes of Health Research 245760NEI NIH HHS EY004077NEI NIH HHS EY023216NEI NIH HHS P30 EY011374NEI NIH HHS R01 EY004077NEI NIH HHS R21 EY023216
6 · The paper itself

Abstract

Neuronal activity results in increased blood flow in the brain, a response named functional hyperemia. Astrocytes play an important role in mediating this response. Neurotransmitters released from active neurons evoke Ca(2+) increases in astrocytes, leading to the release of vasoactive metabolites of arachidonic acid from astrocyte endfeet onto blood vessels. Synthesis of prostaglandin E2 (PGE2) and epoxyeicosatrienoic acids (EETs) dilate blood vessels, whereas 20-hydroxyeicosatetraenoic acid (20-HETE) constricts vessels. The release of K(+) from astrocyte endfeet may also contribute to vasodilation. Oxygen modulates astrocyte regulation of blood flow. Under normoxic conditions, astrocytic Ca(2+) signaling results in vasodilation, whereas under hyperoxic conditions, vasoconstriction is favored. Astrocytes also contribute to the generation of vascular tone. Tonic release of both 20-HETE and ATP from astrocytes constricts vascular smooth muscle cells, generating vessel tone. Under pathological conditions, including Alzheimer's disease and diabetic retinopathy, disruption of normal astrocyte physiology can compromise the regulation of blood flow.

Indexed as

AstrocytesBrainCapillariesCerebrovascular CirculationHumans

Identifiers

PMID25818565
PMCPMC4448617
OpenAlexW2104281661

What OpenQuestion holds

Textmetadata
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.