Evidence map›Paper›PMID 25447299›Full record

ArticleBehavioural brain research2015

Delta opioid receptors expressed in forebrain GABAergic neurons are responsible for SNC80-induced seizures.

Paul Chu Sin Chung, Annie Boehrer, Aline Stephan, Audrey Matifas, Grégory Scherrer, Emmanuel Darcq, Katia Befort, Brigitte L Kieffer

Open access · greenAbstract read
In one paragraph

Article in Behavioural brain research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

40 citing papers in PubMed, 77 citations in OpenAlex.

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  5. Opioid Receptors Modulate Inhibition within the Prefrontal Cortex through Dissociable Cellular and Molecular Mechanisms.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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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

8 authors at 6 institutions in 3 countries.

Paul Chu Sin ChungInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France.
Annie BoehrerInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France.
Aline StephanInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France.
Audrey MatifasInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France.
Grégory ScherrerDepartment of Anesthesiology, Perioperative and Pain Medicine, Department of Molecular and Cellular Physiology, Department of Neurosurgery, Stanford Neurosciences Institute, Stanford University, Palo Alto, CA 94304, USA.
Emmanuel DarcqDouglas Hospital Research Center, Department of Psychiatry, Faculty of Medicine, McGill University, Montreal, Quebec, Canada.
Katia BefortInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France.
Brigitte L KiefferInstitut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch, France; Douglas Hospital Research Center, Department of Psychiatry, Faculty of Medicine, McGill University, Montreal, Quebec, Canada. Electronic address: brigitte.kieffer@douglas.mcgill.ca.
Inserm · FRCentre National de la Recherche Scientifique · FRInstitut de génétique et de biologie moléculaire et cellulaire · FRMcGill University · CANeurosciences Institute · USUniversité de Strasbourg · FR

Funding

The Role of Striosome Neurons in Mediating Opiod RewardP50DA005010 · NIDA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI KIEFFER, BRIGITTE L. · 1987 to 2021
$30.7M
Nr4a1 and GPR88 as novel gene targets for alcoholism: mouse genetic approachesU01AA016658 · NIAAA · UNIVERSITE DE STRASBOURG · PI LAURA ADELA HARSAN · 2006 to 2026
$3.8M
NIAAA NIH HHS U01 AA016658NIDA NIH HHS P50 DA005010PHS HHS 05010PHS HHS 16658
6 · The paper itself

Abstract

The delta opioid receptor (DOR) has raised much interest for the development of new therapeutic drugs, particularly to treat patients suffering from mood disorders and chronic pain. Unfortunately, the prototypal DOR agonist SNC80 induces mild epileptic seizures in rodents. Although recently developed agonists do not seem to show convulsant properties, mechanisms and neuronal circuits that support DOR-mediated epileptic seizures remain to be clarified. DORs are expressed throughout the nervous system. In this study we tested the hypothesis that SNC80-evoked seizures stem from DOR activity at the level of forebrain GABAergic transmission, whose inhibition is known to facilitate the development of epileptic seizures. We generated a conditional DOR knockout mouse line, targeting the receptor gene specifically in GABAergic neurons of the forebrain (Dlx-DOR). We measured effects of SNC80 (4.5, 9, 13.5 and 32 mg/kg), ARM390 (10, 30 and 60 mg/kg) or ADL5859 (30, 100 and 300 mg/kg) administration on electroencephalograms (EEGs) recorded in Dlx-DOR mice and their control littermates (Ctrl mice). SNC80 produced dose-dependent seizure events in Ctrl mice, but these effects were not detected in Dlx-DOR mice. As expected, ARM390 and ADL5859 did not trigger any detectable change in mice from both genotypes. These results demonstrate for the first time that SNC80-induced DOR activation induces epileptic seizures via direct inhibition of GABAergic forebrain neurons, and supports the notion of differential activities between first and second-generation DOR agonists.

Indexed as

SeizuresAnalgesics, OpioidAnimalsBenzamidesBenzopyransDisease Models, AnimalDose-Response Relationship, DrugElectroencephalographyGABAergic NeuronsGene Expression RegulationMiceMice, KnockoutPiperazinesProsencephalonReaction TimeReceptors, Opioid, delta4-(alpha-(4-allyl-2,5-dimethyl-1-piperazinyl)-3-methoxybenzyl)-N,N-diethylbenzamideAnalgesics, OpioidBenzamidesBenzopyransN,N-diethyl-4-(5-hydroxyspiro(chromene-2,4'-piperidine)-4-yl)benzamidePiperazinesReceptors, Opioid, deltaBiased agonismConditional knockoutDelta agonistDelta opioid receptorEpileptic seizureIn vivo

Identifiers

PMID25447299
PMCPMC4382405
OpenAlexW2083136363

What OpenQuestion holds

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Registered trials

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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.