Evidence map›Paper›PMID 24591078›Full record

ArticleAnnals of neurology2014

KCNT1 gain of function in 2 epilepsy phenotypes is reversed by quinidine.

Carol J Milligan, Melody Li, Elena V Gazina, Sarah E Heron, Umesh Nair, Chantel Trager, Christopher A Reid, Anu Venkat, Donald P Younkin, Dennis J Dlugos and 6 more

Open access · greenAbstract read
In one paragraph

Article in Annals of neurology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 114 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
114citing papers in PubMed, 3 pooled it
19.2field-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

114 citing papers in PubMed, 3 syntheses or guidelines pooled it, 294 citations in OpenAlex.

  1. Pooled it
  2. New use for an old drug: quinidine in KCNT1-related epilepsy therapy.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2023
    Pooled it
  3. Pooled it
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  18. New epilepsy therapies in development.Nature reviews. Drug discovery · 2024
    Review
  19. Heterozygous expression of abioRxiv : the preprint server for biology · 2024
    Article
  20. Review

54 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

16 authors at 6 institutions in 2 countries.

Carol J MilliganIon Channels and Disease Group, Epilepsy Division, Florey Institute of Neuroscience and Mental Health, Parkville, Australia.
Melody Li
Elena V Gazina
Sarah E Heron
Umesh Nair
Chantel Trager
Christopher A Reid
Anu Venkat
Donald P Younkin
Dennis J Dlugos
Slavé Petrovski
David B Goldstein
Leanne M Dibbens
Ingrid E Scheffer
Samuel F Berkovic
Steven Petrou
Florey Institute of Neuroscience and Mental Health · AUChildren's Hospital of Philadelphia · USCenter for Human Genetics · USUniversity of South Australia · AURoyal Children's Hospital · AUUniversity of Melbourne · AU

Funding

The Epilepsy Phenome/ Genome Project (EPGP)U01NS053998 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LOWENSTEIN, DANIEL H · 2007 to 2013
$26.4M
3 of 7 Epi4K: Sequencing, Biostatistics & Bioinformatics CoreU01NS077303 · NINDS · DUKE UNIVERSITY · PI EICHLER, EVAN, GOLDSTEIN, DAVID B. · 2011 to 2018
$13.3M
2 of 7 EPI4K - Phenotyping Clinical Informatics Core U01NS077276 · NINDS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LOWENSTEIN, DANIEL H · 2011 to 2015
$3.1M
1 of 7 Epi4K: Gene discovery in 4,000 epilepsy genomes - Administrative CoreU01NS077274 · NINDS · DUKE UNIVERSITY · PI GOLDSTEIN, DAVID B. · 2011 to 2015
$776k
NINDS NIH HHS NS053998NINDS NIH HHS NS077274NINDS NIH HHS NS077276NINDS NIH HHS NS077303NINDS NIH HHS U01 NS053998NINDS NIH HHS U01 NS077274NINDS NIH HHS U01 NS077276NINDS NIH HHS U01 NS077303
6 · The paper itself

Abstract

objectiveMutations in KCNT1 have been implicated in autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE) and epilepsy of infancy with migrating focal seizures (EIMFS). More recently, a whole exome sequencing study of epileptic encephalopathies identified an additional de novo mutation in 1 proband with EIMFS. We aim to investigate the electrophysiological and pharmacological characteristics of hKCNT1 mutations and examine developmental expression levels.

methodsHere we use a Xenopus laevis oocyte-based automated 2-electrode voltage clamp assay. The effects of quinidine (100 and 300 μM) are also tested. Using quantitative reverse transcriptase polymerase chain reaction, the relative levels of mouse brain mKcnt1 mRNA expression are determined.

resultsWe demonstrate that KCNT1 mutations implicated in epilepsy cause a marked increase in function. Importantly, there is a significant group difference in gain of function between mutations associated with ADNFLE and EIMFS. Finally, exposure to quinidine significantly reduces this gain of function for all mutations studied.

interpretationThese results establish direction for a targeted therapy and potentially exemplify a translational paradigm for in vitro studies informing novel therapies in a neuropsychiatric disease.

Indexed as

AnimalsBrainDose-Response Relationship, DrugElectric StimulationHumansMaleMembrane PotentialsMiceMice, Inbred C57BLMicroinjectionsMutationNerve Tissue ProteinsOocytesPatch-Clamp TechniquesPotassium ChannelsPotassium Channels, Sodium-Activated4-O-methyl-12-O-tetradecanoylphorbol 13-acetateKCNT1 protein, humanNerve Tissue ProteinsPotassium ChannelsPotassium Channels, Sodium-ActivatedQuinidineTetradecanoylphorbol AcetateVoltage-Gated Sodium Channel Blockers

Identifiers

PMID24591078
PMCPMC4158617
OpenAlexW2147817553

What OpenQuestion holds

Textmetadata
LicenceTDM
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.