Evidence map›Paper›PMID 12970082›Full record

ArticleBritish journal of pharmacology2003

Voltage-dependent calcium channels are involved in neurogenic dural vasodilatation via a presynaptic transmitter release mechanism.

S Akerman, D J Williamson, P J Goadsby

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in British journal of pharmacology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
4.1field-weighted citation impact, top 6% 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

27 citing papers in PubMed, 99 citations in OpenAlex.

  1. Hallmarks of primary headache: part 3 - cluster headache.The journal of headache and pain · 2025
    Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. Migraine: Calcium Channels and Glia.International journal of molecular sciences · 2021
    Review
  7. Review
  8. Article
  9. Trigeminovascular calcitonin gene-related peptide function in Cacna1a R192Q-mutated knock-in mice.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2019
    Article
  10. Resolution of Persistent Post-Stapedotomy Vertigo With Migraine Prophylactic Medication.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2017
    Article
  11. Efficacy of (Pain reports · 2016
    Article
  12. Article
  13. The proteome of mouse cerebral arteries.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2014
    Article
  14. Review
  15. Article
  16. Article
  17. CaV2.1 channelopathies.Pflugers Archiv : European journal of physiology · 2010
    Review
  18. Review
  19. Review
  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

3 authors at 3 institutions in 2 countries.

S AkermanHeadache Group, Institute of Neurology, Queen Square, London, UK.
D J Williamson
P J Goadsby
Merck & Co., Inc., Rahway, NJ, USA (United States) · USNIHR Queen Square Dementia Biomedical Research Unit · GBUniversity College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Amissense mutation of the CACNA1A gene that encodes the alpha1A subunit of the voltage-dependent P/Q-type calcium channel has been discovered in patients suffering from familial hemiplegic migraine. This suggested that calcium channelopathies may be involved in migraine more broadly, and established the importance of genetic mechanisms in migraine. Channelopathies share many clinical characteristics with migraine, and thus exploring calcium channel functions in the trigeminovascular system may give insights into migraine pathophysiology. It is also known that drugs blocking the P/Q- and N-type calcium channels have been successful in other animal models of trigeminovascular activation and head pain. In the present study, we used intravital microscopy to examine the effects of specific calcium channel blockers on neurogenic dural vasodilatation and calcitonin gene-related peptide (CGRP)-induced dilation. The L-type voltage-dependent calcium channel blocker calciseptine significantly attenuated (20 microg kg(-1), n=7) the dilation brought about by electrical stimulation, but did not effect CGRP-induced dural dilation. The P/Q-type voltage-dependent calcium channel blocker omega-agatoxin-IVA (20 microg kg-1, n=7) significantly attenuated the dilation brought about by electrical stimulation, but did not effect CGRP-induced dural dilation. The N-type voltage-dependent calcium channel blocker omega-conotoxin-GVIA (20 microg kg(-1), n=8 and 40 microg kg(-1), n=7) significantly attenuated the dilation brought about by electrical stimulation, but did not effect CGRP-induced dural dilation. It is thought that the P/Q-, N- and L-type calcium channels all exist presynaptically on trigeminovascular neurons, and blockade of these channels prevents CGRP release, and, therefore, dural blood vessel dilation. These data suggest that the P/Q-, N- and L-type calcium channels may be involved in trigeminovascular nociception.

Indexed as

AnimalsCalcitonin Gene-Related PeptideCalcium Channel BlockersCalcium ChannelsDose-Response Relationship, DrugDura MaterMaleMeningeal ArteriesNeuronsPresynaptic TerminalsRatsRats, Sprague-DawleyVasodilationCalcitonin Gene-Related PeptideCalcium Channel BlockersCalcium Channels

Identifiers

PMID12970082
PMCPMC1574049
OpenAlexW1993485895

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.