Evidence map›Paper›PMID 33325057›Full record

ArticleAnnals of neurology2021

Characterization of the GABRB2-Associated Neurodevelopmental Disorders.

Christelle M El Achkar, Merle Harrer, Lacey Smith, McKenna Kelly, Sumaiya Iqbal, Snezana Maljevic, Cristina E Niturad, Lisenka E L M Vissers, Annapurna Poduri, Edward Yang and 5 more

Erratum issuedOpen access · bronzeAbstract read
In one paragraph

Article in Annals of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.7field-weighted citation impact, top 10% 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

22 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
  2. Update on Genetic Chorea.Current neurology and neuroscience reports · 2026
    Review
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  5. Review
  6. AExperimental and therapeutic medicine · 2025
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  7. Review
  8. Proteostasis regulation of GABABiomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2025
    Review
  9. Review
  10. Understanding paralogous epilepsy-associated GABAProceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  11. GABAJournal of neurochemistry · 2024
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Epileptic EncephalopathyBiomolecules · 2023
    Article
  17. Pathogenicity Prediction of GABAbioRxiv : the preprint server for biology · 2023
    Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 8 institutions in 6 countries.

Christelle M El AchkarDivision of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA.
Merle HarrerDepartment of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
Lacey SmithDivision of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA.
McKenna KellyDivision of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA.
Sumaiya IqbalCenter for Development of Therapeutics and Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA.
Snezana MaljevicDepartment of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
Cristina E NituradDepartment of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
Lisenka E L M VissersDepartment of Human Genetics, Donders Institute for Brain, Cognition, and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands.
Annapurna PoduriDivision of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA.ORCID 0000-0002-7350-5136
Edward YangDepartment of Radiology, Boston Children's Hospital, Boston, MA.
Dennis LalCleveland Clinic Genomic Medicine Institute and Neurological Institute, Cleveland, OH.
Holger LercheDepartment of Neurology and Epileptology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
Rikke S MøllerDepartment of Epilepsy Genetics and Personalized Treatment, Danish Epilepsy Center Filadelfia, Dianalund, Denmark.ORCID 0000-0002-9664-1448
Heather E OlsonDivision of Epilepsy and Clinical Neurophysiology and Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Boston, MA.ORCID 0000-0002-5385-0119
GABRB2 Working Group
Boston Children's Hospital · USHertie Institute for Clinical Brain Research · DEBroad Institute · USCleveland Clinic · USDartmouth College · USRadboud University Nijmegen · NLThe University of Melbourne · AUUniversity of Southern Denmark · DK

Funding

Joint Center for Mendelian GenomicsUM1HG008900 · NHGRI · BROAD INSTITUTE, INC. · PI O'DONNELL-LURIA, ANNE, REHM, HEIDI L · 2016 to 2020
$16.5M
Mouse Neurodevelopmental Behavior CoreU54HD090255 · NICHD · BOSTON CHILDREN'S HOSPITAL · PI POMEROY, SCOTT LOREN · 2016 to 2020
$5.2M
A Genomic Approach to EpilepsyR01NS069605 · NINDS · UNIVERSITY OF WASHINGTON · PI MEFFORD, HEATHER C. · 2010 to 2019
$4.9M
A powerful web-based discovery platform for rare disease geneticsR01HG009141 · NHGRI · BROAD INSTITUTE, INC. · PI QUINLAN, AARON R, REHM, HEIDI L · 2017 to 2020
$2.9M
Diagnosis and Genotype-Phenotype Correlations in Early Life Epilepsy and CDKL5 DisorderK23NS107646 · NINDS · BOSTON CHILDREN'S HOSPITAL · PI OLSON, HEATHER ELISA · 2018 to 2023
$1.2M
Children's Hospital Boston Neurological Sciences Academic Development AwardK12NS079414 · NINDS · BOSTON CHILDREN'S HOSPITAL · PI POMEROY, SCOTT LOREN · 2012 to 2016
$1.2M
NHGRI NIH HHS R01 HG009141NHGRI NIH HHS UM1 HG008900NICHD NIH HHS U54 HD090255NINDS NIH HHS 5K12NS079414-02NINDS NIH HHS K12 NS079414NINDS NIH HHS K23 NS107646NINDS NIH HHS R01NS069605
6 · The paper itself

Abstract

objectiveWe aimed to characterize the phenotypic spectrum and functional consequences associated with variants in the gene GABRB2, coding for the γ-aminobutyric acid type A (GABA

methodsWe recruited and systematically evaluated 25 individuals with variants in GABRB2, 17 of whom are newly described and 8 previously reported with additional clinical data. Functional analysis was performed using a Xenopus laevis oocyte model system.

resultsOur cohort of 25 individuals from 22 families with variants in GABRB2 demonstrated a range of epilepsy phenotypes from genetic generalized epilepsy to developmental and epileptic encephalopathy. Fifty-eight percent of individuals had pharmacoresistant epilepsy; response to medications targeting the GABAergic pathway was inconsistent. Developmental disability (present in 84%) ranged from mild intellectual disability to severe global disability; movement disorders (present in 44%) included choreoathetosis, dystonia, and ataxia. Disease-associated variants cluster in the extracellular N-terminus and transmembrane domains 1-3, with more severe phenotypes seen in association with variants in transmembrane domains 1 and 2 and the allosteric binding site between transmembrane domains 2 and 3. Functional analysis of 4 variants in transmembrane domains 1 or 2 (p.Ile246Thr, p.Pro252Leu, p.Ile288Ser, p.Val282Ala) revealed strongly reduced amplitudes of GABA-evoked anionic currents.

interpretationGABRB2-related epilepsy ranges broadly in severity from genetic generalized epilepsy to developmental and epileptic encephalopathies. Developmental disability and movement disorder are key features. The phenotypic spectrum is comparable to other GABA

Indexed as

AdolescentAdultAnimalsAtaxiaAthetosisChildChild, PreschoolChoreaCohort StudiesDevelopmental DisabilitiesDrug Resistant EpilepsyDystoniaEpilepsyFemaleGenotypeHumansGABRB2 protein, humanReceptors, GABA-A

Identifiers

PMID33325057
PMCPMC9161810
OpenAlexW3111875652

What OpenQuestion holds

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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.