Exome sequencing of ion channel genes reveals complex profiles confounding personal risk assessment in epilepsy

Tara Klassen, Caleb Davis, Alica Goldman, Dan Burgess, Tim Chen, David Wheeler, John Douglas Mcpherson, Traci Bourquin, Lora Lewis, Donna Villasana, Margaret Morgan, Donna Muzny, Richard Gibbs, Jeffrey Noebels

Research output: Contribution to journalArticle

206 Scopus citations

Abstract

Ion channel mutations are an important cause of rare Mendelian disorders affecting brain, heart, and other tissues. We performed parallel exome sequencing of 237 channel genes in a well-characterized human sample, comparing variant profiles of unaffected individuals to those with the most common neuronal excitability disorder, sporadic idiopathic epilepsy. Rare missense variation in known Mendelian disease genes is prevalent in both groups at similar complexity, revealing that even deleterious ion channel mutations confer uncertain risk to an individual depending on the other variants with which they are combined. Our findings indicate that variant discovery via large scale sequencing efforts is only a first step in illuminating the complex allelic architecture underlying personal disease risk. We propose that in silico modeling of channel variation in realistic cell and network models will be crucial to future strategies assessing mutation profile pathogenicity and drug response in individuals with a broad spectrum of excitability disorders.

Original languageEnglish (US)
Pages (from-to)1036-1048
Number of pages13
JournalCell
Volume145
Issue number7
DOIs
StatePublished - Jun 24 2011
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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    Klassen, T., Davis, C., Goldman, A., Burgess, D., Chen, T., Wheeler, D., Mcpherson, J. D., Bourquin, T., Lewis, L., Villasana, D., Morgan, M., Muzny, D., Gibbs, R., & Noebels, J. (2011). Exome sequencing of ion channel genes reveals complex profiles confounding personal risk assessment in epilepsy. Cell, 145(7), 1036-1048. https://doi.org/10.1016/j.cell.2011.05.025