Evidence map›Paper›PMID 1697946›Full record

ArticlePflugers Archiv : European journal of physiology1990

The action of caffeine on inward barium current through voltage-dependent calcium channels in single rabbit ear artery cells.

A D Hughes, S Hering, T B Bolton

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Pflugers Archiv : European journal of physiology, 1990. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.0field-weighted citation impact, top 8% 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

25 citing papers in PubMed, 61 citations in OpenAlex.

  1. Article
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  4. Review
  5. Caffeine's Vascular Mechanisms of Action.International journal of vascular medicine · 2010
    Article
  6. Article
  7. Caffeine-sensitive calcium stores regulate synaptic transmission from retinal rod photoreceptors.The Journal of neuroscience : the official journal of the Society for Neuroscience · 1999
    Article
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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 1 country.

A D HughesDepartment of Pharmacology and Clinical Pharmacology, St. George's Hospital Medical School, London, UK.
S Hering
T B Bolton
St George's Hospital · GBSt George's, University of London · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

The effect of caffeine on inward current carried by barium ions through voltage-dependent calcium channels has been investigated in single rabbit ear artery cells using whole-cell voltage-clamp techniques. Caffeine (1-30 mM) caused a rapid and reversible concentration-dependent blockade of barium current and a related compound, 3-isobutyl-1-methylxanthine (IBMX), was a more potent inhibitor of barium current. Caffeine-induced inhibition of barium current showed no voltage- or use-dependence and caffeine did not alter the steady-state inactivation of barium current. The effect of caffeine was not blocked by extracellular or by intracellular ryanodine or inclusion of both 5 mM 1,2-bis(2-aminophenoxy)-ethane N,N,N',N',-tetraacetic acid (BAPTA) and 2 mM ethylene glycol-bis(beta-amino ethyl ether) N,N,N',N',-tetraacetic acid (EGTA) in the intracellular solution. Rolipram and M&B 22984, non-xanthine inhibitors of phosphodiesterase, did not diminish inward barium current. The data indicate that caffeine and IBMX block voltage-operated calcium channels and it is suggested that this is due to a direct interaction of methylxanthines with the calcium channel.

Indexed as

1-Methyl-3-isobutylxanthineAnimalsArteriesBariumCaffeineCalcium ChannelsCell MembraneEarElectric ConductivityFemaleIon ChannelsMaleMuscle, Smooth, VascularPhosphodiesterase InhibitorsPurinonesPyrrolidinones1-Methyl-3-isobutylxanthineBariumCaffeineCalcium ChannelsIon ChannelsmethylxanthinePhosphodiesterase InhibitorsPurinonesPyrrolidinonesRolipramXanthineszaprinast

Identifiers

PMID1697946
OpenAlexW1967166654

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.