Evidence map›Paper›PMID 24068867›Full record

ArticleDrug design, development and therapy2013

Unexpected effects of peripherally administered kynurenic acid on cortical spreading depression and related blood-brain barrier permeability.

Gáspár Oláh, Judit Herédi, Akos Menyhárt, Zsolt Czinege, Dávid Nagy, János Fuzik, Kitti Kocsis, Levente Knapp, Erika Krucsó, Levente Gellért and 7 more

Open access · goldAbstract read
In one paragraph

Article in Drug design, development and therapy, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
1.0field-weighted citation impact, top 27% 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

28 citing papers in PubMed, 2 syntheses or guidelines pooled it, 42 citations in OpenAlex.

  1. BrainFrontiers in immunology · 2021
    Pooled it
  2. Systematic review of the pharmacological agents that have been tested against spreading depolarizations.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2018
    Pooled it
  3. Trial
  4. Article
  5. Review
  6. Review
  7. Review
  8. Review
  9. Review
  10. Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Synthesis and biological evaluation of new 3(2Journal of enzyme inhibition and medicinal chemistry · 2020
    Article
  16. Article
  17. Biopotential ofAntioxidants (Basel, Switzerland) · 2020
    Article
  18. Review
  19. Review
  20. Article
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

17 authors at 1 institution in 1 country.

Gáspár OláhDepartment of Physiology, Anatomy and Neuroscience, University of Szeged, Közép fasor 52, Szeged, Hungary.
Judit Herédi
Akos Menyhárt
Zsolt Czinege
Dávid Nagy
János Fuzik
Kitti Kocsis
Levente Knapp
Erika Krucsó
Levente Gellért
Zsolt Kis
Tamás Farkas
Ferenc Fülöp
Arpád Párdutz
János Tajti
László Vécsei
József Toldi
University of Szeged · HU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cortical spreading depression (CSD) involves a slowly-propagating depolarization wave in the cortex, which can appear in numerous pathophysiological conditions, such as migraine with aura, stroke, and traumatic brain injury. Neurons and glial cells are also depolarized transiently during the phenomena. CSD is followed by a massive increase in glutamate release and by changes in the brain microcirculation. The aim of this study was to investigate the effects of two N-methyl-D-aspartate receptor antagonists, endogenous kynurenic acid (KYNA) and dizocilpine, on CSD and the related blood-brain barrier (BBB) permeability in rats. In intact animals, KYNA hardly crosses the BBB but has some positive features as compared with its precursor L-Kynurenine, which is frequently used in animal studies (KYNA cannot be metabolized to excitotoxic agents such as 3-hydroxy-L-kynurenine and quinolinic acid). We therefore investigated the possible effects of peripherally administered KYNA. Repetitive CSD waves were elicited by the application of 1 M KCl solution to the cortex. Direct current-electrocorticograms were measured for 1 hour. Four parameters of the waves were compared. Evans blue dye and fluorescent microscopy were used to study the possible changes in the permeability of the BBB. The results demonstrated that N-methyl-D-aspartate receptor antagonists can reduce the number of CSD waves and decrease the permeability of the BBB during CSD. These results suggest that KYNA itself or its derivatives may offer a new approach in the therapy of migraines.

Indexed as

AnimalsBlood-Brain BarrierCortical Spreading DepressionDizocilpine MaleateElectroencephalographyExcitatory Amino Acid AntagonistsKynurenic AcidMaleMicroscopy, FluorescenceMigraine DisordersPermeabilityRatsRats, WistarDizocilpine MaleateExcitatory Amino Acid AntagonistsKynurenic Acidblood–brain barriercortical spreading depressionglutamate receptorskynurenic acidkynureninesNMDAR

Identifiers

PMID24068867
PMCPMC3782408
OpenAlexW2063310429

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.