Evidence map›Paper›PMID 9306276›Full record

ArticleThe Journal of physiology1997

Mechanism of glibenclamide inhibition of cystic fibrosis transmembrane conductance regulator Cl- channels expressed in a murine cell line.

D N Sheppard, K A Robinson

Open access · greenAbstract read
In one paragraph

Article in The Journal of physiology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed, 1 pooled it
10.2field-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

92 citing papers in PubMed, 1 synthesis or guideline pooled it, 204 citations in OpenAlex.

  1. Rhinorrhea and increased chloride secretion through the CFTR chloride channel-a systematic review.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2023
    Pooled it
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  7. Structural identification of a selectivity filter in CFTR.Proceedings of the National Academy of Sciences of the United States of America · 2024
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  19. Expression of KOncology letters · 2018
    Article
  20. Structural mechanisms of CFTR function and dysfunction.The Journal of general physiology · 2018
    Review

32 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 1 institution in 1 country.

D N SheppardDepartment of Medicine, University of Edinburgh, UK. D.N.Sheppard@ed.ac.uk
K A Robinson
University of Edinburgh · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

1. The sulphonylurea drug glibenclamide is a widely used inhibitor of the cystic fibrosis transmembrane conductance regulator (CFTR). To investigate how glibenclamide inhibits CFTR, we studied CFTR Cl- channels using excised inside-out membrane patches from cells expressing wild-type human CFTR. 2. Addition of glibenclamide (10-100 microM) to the intracellular solution caused a concentration-dependent decrease in the open time of CFTR Cl- channels, but closed times did not change. This suggests that glibenclamide is an open-channel blocker of CFTR. 3. Glibenclamide is a weak organic acid. Acidification of the intracellular solution relieved glibenclamide inhibition of CFTR, suggesting that the anionic form of glibenclamide inhibits CFTR. 4. To begin to identify the glibenclamide binding site in CFTR, we investigated whether glibenclamide competes with either MgATP or Cl- ions for a common binding site. Glibenclamide inhibition of CFTR was unaffected by nucleotide-dependent stimulation of CFTR, suggesting that glibenclamide and intracellular MgATP interact with CFTR at distinct sites. 5. Glibenclamide inhibition of CFTR was voltage dependent and enhanced when the external Cl- concentration was decreased. The data suggest that glibenclamide and Cl- ions may compete for a common binding site located within a large intracellular vestibule that is part of the CFTR pore.

Indexed as

AnimalsCell LineChloride ChannelsCystic Fibrosis Transmembrane Conductance RegulatorDiphosphatesElectric StimulationElectrophysiologyGlyburideHumansHypoglycemic AgentsIon Channel GatingKineticsMembrane PotentialsMicePatch-Clamp TechniquesCFTR protein, humanChloride ChannelsCystic Fibrosis Transmembrane Conductance RegulatorDiphosphatesGlyburideHypoglycemic Agents

Identifiers

PMID9306276
PMCPMC1159866
OpenAlexW2043338020

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.