Evidence map›Paper›PMID 17918265›Full record

ArticleAnnals of neurology2008

Bumetanide enhances phenobarbital efficacy in a neonatal seizure model.

Volodymyr I Dzhala, Audrey C Brumback, Kevin J Staley

Registry-linked trialAbstract read
PubMed Publisher
In one paragraph

Article in Annals of neurology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT00830531 (Pilot Study of Bumetanide for Newborn Seizures), which is not on this map. Cited by 122 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
122citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 2% 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.

NCT00830531 phase1completednot on this mapstarted 2010, after this paper: background citation

Pilot Study of Bumetanide for Newborn Seizures: A Phase I Study of Pharmacokinetics and Safety of Bumetanide for Neonatal Seizures

TypeinterventionalSponsorSoul, Janet , M.D.Ran2010 to 2019Enrolled43ConditionsSeizuresArmsBumetanide, Normal Saline as Placebo
3 · Its place in the literature

Who cites it

122 citing papers in PubMed, 1 synthesis or guideline pooled it, 268 citations in OpenAlex.

  1. Anti-seizure medications for neonates with seizures.The Cochrane database of systematic reviews · 2023
    Pooled it
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  12. The role ofJournal of pharmaceutical analysis · 2023
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  18. Novel Therapeutics for Neonatal Seizures.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2021
    Review
  19. Unique Actions of GABA Arising from Cytoplasmic Chloride Microdomains.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021
    Article
  20. Article

62 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 3 institutions in 1 country.

Volodymyr I DzhalaDepartment of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
Audrey C Brumback
Kevin J Staley
Harvard University · USMassachusetts General Hospital · USUniversity of Colorado Denver · US

Funding

Neuronal Chloride distribution by displacementR01NS040109 · NINDS · UNIVERSITY OF COLORADO DENVER · PI STALEY, KEVIN J. · 2000 to 2020
$7.2M
NINDS NIH HHS R01 NS40109
6 · The paper itself

Abstract

objectivesHigh levels of expression of the Na+-K+-2Cl- (NKCC1) cotransporter in immature neurons cause the accumulation of intracellular chloride and, therefore, a depolarized Cl- equilibrium potential (E(Cl)). This results in the outward flux of Cl- through GABA(A) channels, the opposite direction compared with mature neurons, in which GABA(A) receptor activation is inhibitory because Cl- flows into the cell. This outward flow of Cl- in neonatal neurons is excitatory and contributes to a greater seizure propensity and poor electroencephalographic response to GABAergic anticonvulsants such as phenobarbital and benzodiazepines. Blocking the NKCC1 transporter with bumetanide prevents outward Cl- flux and causes a more negative GABA equilibrium potential (E(GABA)) in immature neurons. We therefore tested whether bumetanide enhances the anticonvulsant action of phenobarbital in the neonatal brain

methodsRecurrent seizures were induced in the intact hippocampal preparation in vitro by continuous 5-hour exposure to low-Mg2+ solution. The anticonvulsant efficacy of phenobarbital, bumetanide, and the combination of these drugs was studied

resultsPhenobarbital failed to abolish or depress recurrent seizures in 70% of hippocampi. In contrast, phenobarbital in combination with bumetanide abolished seizures in 70% of hippocampi and significantly reduced the frequency, duration, and power of seizures in the remaining 30%

interpretationThus, alteration of Cl- transport by bumetanide enables the anticonvulsant action of phenobarbital in immature brain. This is a mechanistic demonstration of rational anticonvulsant polypharmacy. The combination of these agents may comprise an effective therapy for early-life seizures.

Indexed as

AnimalsAnticonvulsantsBumetanideChloride ChannelsChloridesDrug SynergismDrug Therapy, CombinationEpilepsy, Benign NeonatalHippocampusIon TransportMagnesium DeficiencyMaleMembrane PotentialsModels, BiologicalNeural InhibitionOrgan Culture TechniquesAnticonvulsantsBumetanideChloride ChannelsChloridesPhenobarbitalReceptors, GABA-ASlc12a2 protein, ratSodium Potassium Chloride Symporter InhibitorsSodium-Potassium-Chloride SymportersSolute Carrier Family 12, Member 2

Identifiers

PMID17918265
OpenAlexW1965968130

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.