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Genomic analysis of “microphenotypes” in epilepsy

Lookup NU author(s): Dr David Lewis-Smith

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Abstract

© 2021 The Authors. American Journal of Medical Genetics Part A published by Wiley Periodicals LLC.Large international consortia examining the genomic architecture of the epilepsies focus on large diagnostic subgroupings such as “all focal epilepsy” and “all genetic generalized epilepsy”. In addition, phenotypic data are generally entered into these large discovery databases in a unidirectional manner at one point in time only. However, there are many smaller phenotypic subgroupings in epilepsy, many of which may have unique genomic risk factors. Such a subgrouping or “microphenotype” may be defined as an uncommon or rare phenotype that is well recognized by epileptologists and the epilepsy community, and which may or may not be formally recognized within the International League Against Epilepsy classification system. Here we examine the genetic structure of a number of such microphenotypes and report in particular on two interesting clinical phenotypes, Jeavons syndrome and pediatric status epilepticus. Although no single gene reached exome-wide statistical significance to be associated with any of the diagnostic categories, we observe enrichment of rare damaging variants in established epilepsy genes among Landau–Kleffner patients (GRIN2A) and pediatric status epilepticus patients (MECP2, SCN1A, SCN2A, SCN8A).


Publication metadata

Author(s): Stanley K, Hostyk J, Tran L, Dugan P, Clark J, Choi H, Perucca P, Fernandes C, Andrade D, Devinsky O, Cavalleri GL, Depondt C, Sen A, O'Brien T, Heinzen E, Loddenkemper T, Goldstein DB, Mikati MA, Delanty N, Adcock J, Andrade D, Brazil C, Cavalleri G, Choi H, Costello D, Delanty N, Depondt C, Dugan P, Goldstein D, Heinzen E, Lewis-Smith D, O'Brien T, Perucca P, Radtke R, Rees M, Sen A, Stanley K, Thomas R, Amengual-Gual M, Amengual-Gual M, Arya R, Agullar CB, Clark J, Fernandes C, Gainza-Lein M, Glauser TA, Goldstein D, Joshua L, Ann G, Lurie RH, Heinzen ME, Jackson, Tran L, Loddenkemper T, McDonough TL, Mikati MA, Peariso K, Fernandez IS, Sands T, Sheehan T, Stanley K, Tasker RC, Tchapyjnikov D, Tchapyjnikov D, Vasquez A, Wainright MS, Wilfong A, Williams K

Publication type: Article

Publication status: Published

Journal: American Journal of Medical Genetics, Part A

Year: 2022

Volume: 188

Issue: 1

Pages: 138-146

Print publication date: 01/01/2022

Online publication date: 27/09/2021

Acceptance date: 23/07/2021

ISSN (print): 1552-4825

ISSN (electronic): 1552-4833

Publisher: John Wiley and Sons Inc

URL: https://doi.org/10.1002/ajmg.a.62505

DOI: 10.1002/ajmg.a.62505


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