Evidence map›Paper›PMID 24533090›Full record

ArticlePloS one2014

Clobazam and its active metabolite N-desmethylclobazam display significantly greater affinities for α₂- versus α₁-GABA(A)-receptor complexes.

Henrik Sindal Jensen, Kathryn Nichol, Deborah Lee, Bjarke Ebert

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
1.7field-weighted citation impact, top 19% 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

27 citing papers in PubMed, 62 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Review
  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Antiepileptic Drugs-Induced Enuresis in Children: An Overview.The Journal of pharmacy technology : jPT : official publication of the Association of Pharmacy Technicians · 2021
    Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Potentiating αThe Journal of physiology · 2019
    Article
  18. Effects of antiepileptic drugs in a new TSC/mTOR-dependent epilepsy mouse model.Annals of clinical and translational neurology · 2019
    Article
  19. Review
  20. PharmGKB summary: clobazam pathway, pharmacokinetics.Pharmacogenetics and genomics · 2018
    Article
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

4 authors at 3 institutions in 2 countries.

Henrik Sindal JensenSynaptic Transmission, Neuroscience Drug Discovery, H. Lundbeck A/S, Valby, Denmark.
Kathryn NicholMedical Affairs, Lundbeck LLC, Deerfield, Illinois, United States of America.
Deborah LeeClinical Affairs, Lundbeck LLC, Deerfield, Illinois, United States of America.
Bjarke EbertDepartment of Electrophysiology, H. Lundbeck A/S, Valby, Denmark.
Lundbeck (Denmark) · DKDeerfield (United States) · USLundbeck (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Clobazam (CLB), a 1,5-benzodiazepine (BZD), was FDA-approved in October 2011 for the adjunctive treatment of seizures associated with Lennox-Gastaut syndrome (LGS) in patients 2 years and older. BZDs exert various CNS effects through allosteric modulation of GABAA receptors. The structurally distinct, 1,4-BZD clonazepam (CLN) is also approved to treat LGS. The precise mechanisms of action and clinical efficacy of both are unknown. Data show that the GABAA α₁-subunit-selective compound zolpidem [ZOL] exhibits hypnotic/sedative effects. Conversely, data from knock-in mice carrying BZD binding site mutations suggest that the α₂ subunit mediates anticonvulsant effects, without sedative actions. Hence, the specific pattern of interactions across the GABAA receptor complexes of BZDs might be reflected in their clinical efficacies and adverse effect profiles. In this study, GABAA-receptor binding affinities of CLB, N-desmethylclobazam (N-CLB, the major metabolite of CLB), CLN, and ZOL were characterized with native receptors from rat-brain homogenates and on cloned receptors from HEK293 cells transfected with combinations of α (α₁, α₂, α₃, or α₅), β₂, and γ₂ subtypes. Our results demonstrate that CLB and N-CLB have significantly greater binding affinities for α₂- vs. α₁-receptor complexes, a difference not observed for CLN, for which no distinction between α₂ and α₁ receptors was observed. Our experiments with ZOL confirmed the high preference for α₁ receptors. These results provide potential clues to a new understanding of the pharmacologic modes of action of CLB and N-CLB.

Indexed as

Allosteric SiteAnimalsAnticonvulsantsBenzodiazepinesBinding SitesBrainClobazamClonazepamHEK293 CellsHumansKineticsMaleMiceMutationProtein BindingPyridinesAnticonvulsantsBenzodiazepinesClobazamClonazepamN-desmethylclobazamPyridinesReceptors, GABA-AZolpidem

Identifiers

PMID24533090
PMCPMC3922815
OpenAlexW2002695015

What OpenQuestion holds

Textmetadata
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.