mTOR Pathway Mutations Cause Hemimegalencephaly and Focal Cortical Dysplasia

Focal malformations of cortical development, including focal cortical dysplasia (FCD) and hemimegalencephaly (HME), are important causes of intractable childhood epilepsy. Using targeted and exome sequencing on DNA from resected brain samples and non-brain samples from 53 patients with FCD or HME, w...

Full description

Saved in:
Bibliographic Details
Published in:Annals of neurology 2015-02, Vol.77 (4), p.720-725
Main Authors: D'Gama, Alissa M., Geng, Ying, Couto, Javier A., Martin, Beth, Boyle, Evan A., LaCoursiere, Christopher M., Hossain, Amer, Hatem, Nicole E., Barry, Brenda, Kwiatkowski, David J., Vinters, Harry V., Barkovich, A. James, Shendure, Jay, Mathern, Gary W., Walsh, Christopher A., Poduri, Annapurna
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Focal malformations of cortical development, including focal cortical dysplasia (FCD) and hemimegalencephaly (HME), are important causes of intractable childhood epilepsy. Using targeted and exome sequencing on DNA from resected brain samples and non-brain samples from 53 patients with FCD or HME, we identified pathogenic germline and mosaic mutations in multiple PI3K/AKT pathway genes in 9 patients, and a likely pathogenic variant in 1 additional patient. Our data confirm the association of DEPDC5 with sporadic FCD but also implicate this gene for the first time in HME. Our findings suggest that modulation of the mTOR pathway may hold promise for malformation-associated epilepsy.
ISSN:0364-5134
1531-8249
DOI:10.1002/ana.24357