Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorCameron, Jillian M-
dc.contributor.authorMaljevic, Snezana-
dc.contributor.authorNair, Umesh-
dc.contributor.authorAung, Ye Htet-
dc.contributor.authorCogné, Benjamin-
dc.contributor.authorBézieau, Stéphane-
dc.contributor.authorBlair, Edward-
dc.contributor.authorIsidor, Bertrand-
dc.contributor.authorZweier, Christiane-
dc.contributor.authorReis, André-
dc.contributor.authorKoenig, Mary Kay-
dc.contributor.authorMaarup, Timothy-
dc.contributor.authorSarco, Dean-
dc.contributor.authorAfenjar, Alexandra-
dc.contributor.authorHuq, A H M Mahbubul-
dc.contributor.authorKukolich, Mary-
dc.contributor.authorBillette de Villemeur, Thierry-
dc.contributor.authorNava, Caroline-
dc.contributor.authorHéron, Bénédicte-
dc.contributor.authorPetrou, Steven-
dc.contributor.authorBerkovic, Samuel F-
dc.identifier.citationAnnals of clinical and translational neurology 2019; 6(7): 1263-1272-
dc.description.abstractTo analyze clinical phenotypes associated with KCNC1 variants other than the Progressive Myoclonus Epilepsy-causing variant p.Arg320His, determine the electrophysiological functional impact of identified variants and explore genotype-phenotype-physiological correlations. Ten cases with putative pathogenic variants in KCNC1 were studied. Variants had been identified via whole-exome sequencing or gene panel testing. Clinical phenotypic data were analyzed. To determine functional impact of variants detected in the Kv 3.1 channel encoded by KCNC1, Xenopus laevis oocyte expression system and automated two-electrode voltage clamping were used. Six unrelated patients had a Developmental and Epileptic Encephalopathy and a recurrent de novo variant p.Ala421Val (c.1262C > T). Functional analysis of p.Ala421Val revealed loss of function through a significant reduction in whole-cell current, but no dominant-negative effect. Three patients had a contrasting phenotype of Developmental Encephalopathy without seizures and different KCNC1 variants, all of which caused loss of function with reduced whole-cell currents. Evaluation of the variant p.Ala513Val (c.1538C > T) in the tenth case, suggested it was a variant of uncertain significance. These are the first reported cases of Developmental and Epileptic Encephalopathy due to KCNC1 mutation. The spectrum of phenotypes associated with KCNC1 is now broadened to include not only a Progressive Myoclonus Epilepsy, but an infantile onset Developmental and Epileptic Encephalopathy, as well as Developmental Encephalopathy without seizures. Loss of function is a key feature, but definitive electrophysiological separation of these phenotypes has not yet emerged.-
dc.titleEncephalopathies with KCNC1 variants: genotype-phenotype-functional correlations.-
dc.typeJournal Articleen_US
dc.identifier.journaltitleAnnals of clinical and translational neurology-
dc.identifier.affiliationEpilepsy Research Centre, Department of Medicine, Austin Health, The University of Melbourne, Heidelberg, Victoria, Australiaen
dc.identifier.affiliationInstitute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germanyen
dc.identifier.affiliationOxford Centre for Genomic Medicine, ACE Building, Nuffield Orthopaedic Centre, Windmill Road, Oxford, United Kingdomen
dc.identifier.affiliationService de génétique medicale, Centre Hospitalier, Université de Nantes, Nantes, Franceen
dc.identifier.affiliationL'institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, Franceen
dc.identifier.affiliationFlorey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Australiaen
dc.identifier.affiliationCentre de référence des malformations et maladies congénitales du cervelet, Département de génétique médicale, Sorbonne Université, GRC ConCer-LD, AP-HP, Hôpital Armand Trousseau, F-75012, Paris, Franceen
dc.identifier.affiliationSorbonne Universite, GRC ConCer-LD, Neuropédiatrie, Trousseau Hospital, AP-HP, Inserm U1141, Paris, Franceen
dc.identifier.affiliationDépartement de Génétique, Sorbonne Universités, Institut du Cerveau et de la Moelle épinière, ICM, Inserm U1127, CNRS UMR 7225, AP-HP, Hôpital de la Pitié Salpêtrière, F-75013, Paris, Franceen
dc.identifier.affiliationSorbonne Université, GRC N°19, Service de Neuropediatrie, Hôpital Trousseau La Roche Guyon (APHP), La Roche Guyon, Franceen
dc.identifier.affiliationDepartment of Paediatrics, Division of Child & Adolescent Neurology, The University of Texas McGovern Medical School, Houston, Texas-
dc.identifier.affiliationSouthern California Permanente Medical Group, Pasadena, California-
dc.identifier.affiliationWayne State University, Detroit, Michigan-
dc.identifier.affiliationGenetics Department, Cook Children's Health Care System, Fort Worth, Texas-
dc.type.austinJournal Article-, Samuel F
item.openairetypeJournal Article-
item.fulltextNo Fulltext-
item.openairecristype Research Centre- Research Centre-
Appears in Collections:Journal articles
Show simple item record

Page view(s)

checked on May 22, 2024

Google ScholarTM


Items in AHRO are protected by copyright, with all rights reserved, unless otherwise indicated.