Evidence map›Paper›PMID 24866701›Full record

ArticleNature communications2014

Chemical-genetic attenuation of focal neocortical seizures.

Dennis Kätzel, Elizabeth Nicholson, Stephanie Schorge, Matthew C Walker, Dimitri M Kullmann

Open access · hybridAbstract read
In one paragraph

Article in Nature communications, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers.

0numbers the graph read from it
0cells of the map it votes in
89citing papers in PubMed
9.1field-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

89 citing papers in PubMed, 153 citations in OpenAlex.

  1. Article
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  4. Article
  5. Article
  6. Review
  7. State-of-the-art gene therapy in epilepsy.Current opinion in neurology · 2025
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  9. Review
  10. Clozapine is responsible for theFrontiers in pharmacology · 2025
    Article
  11. Article
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  13. Review
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  15. Review
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  17. Article
  18. Imaging-based chemogenetics for dissecting neural circuits in nonhuman primates.Proceedings of the Japan Academy. Series B, Physical and biological sciences · 2024
    Review
  19. Article
  20. Noradrenergic stimulation of αScientific reports · 2023
    Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Dennis KätzelDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Elizabeth NicholsonDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Stephanie SchorgeDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Matthew C WalkerDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Dimitri M KullmannDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK.
National Hospital for Neurology and Neurosurgery · GBUniversity College London · GB

Funding

Medical Research Council G0200373Medical Research Council G0601440Medical Research Council G0801316Medical Research Council G0802158Medical Research Council G116/147Medical Research Council MR/K000608/1Medical Research Council MR/L01095X/1Wellcome Trust 095580Wellcome Trust 098896
6 · The paper itself

Abstract

Focal epilepsy is commonly pharmacoresistant, and resective surgery is often contraindicated by proximity to eloquent cortex. Many patients have no effective treatment options. Gene therapy allows cell-type specific inhibition of neuronal excitability, but on-demand seizure suppression has only been achieved with optogenetics, which requires invasive light delivery. Here we test a combined chemical-genetic approach to achieve localized suppression of neuronal excitability in a seizure focus, using viral expression of the modified muscarinic receptor hM4Di. hM4Di has no effect in the absence of its selective, normally inactive and orally bioavailable agonist clozapine-N-oxide (CNO). Systemic administration of CNO suppresses focal seizures evoked by two different chemoconvulsants, pilocarpine and picrotoxin. CNO also has a robust anti-seizure effect in a chronic model of focal neocortical epilepsy. Chemical-genetic seizure attenuation holds promise as a novel approach to treat intractable focal epilepsy while minimizing disruption of normal circuit function in untransduced brain regions or in the absence of the specific ligand.

Indexed as

Genetic TherapyAcute DiseaseAnimalsClozapineEpilepsies, PartialGene SilencingHumansMaleMotor ActivityNeocortexPicrotoxinPilocarpineRats, Sprague-DawleyReceptor, Muscarinic M4Synaptic TransmissionClozapineclozapine N-oxidePicrotoxinPilocarpineReceptor, Muscarinic M4

Identifiers

PMID24866701
PMCPMC4050272
OpenAlexW2016460935

What OpenQuestion holds

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LicenceCC BY
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.