A microRNA-328 binding site in PAX6 is associated with centrotemporal spikes of rolandic epilepsy.

Abstract:

OBJECTIVE:Rolandic epilepsy is a common genetic focal epilepsy of childhood characterized by centrotemporal sharp waves on electroencephalogram. In previous genome-wide analysis, we had reported linkage of centrotemporal sharp waves to chromosome 11p13, and fine mapping with 44 SNPs identified the ELP4-PAX6 locus in two independent US and Canadian case-control samples. Here, we aimed to find a causative variant for centrotemporal sharp waves using a larger sample and higher resolution genotyping array. METHODS:We fine-mapped the ELP4-PAX6 locus in 186 individuals from rolandic epilepsy families and 1000 population controls of European origin using the Illumina HumanCoreExome-12 v1.0 BeadChip. Controls were matched to cases on ethnicity using principal component analysis. We used generalized estimating equations to assess association, followed up with a bioinformatics survey and literature search to evaluate functional significance. RESULTS:Homozygosity at the T allele of SNP rs662702 in the 3' untranslated region of PAX6 conferred increased risk of CTS: Odds ratio = 12.29 (95% CI: 3.20-47.22), P = 2.6 × 10(-4) and is seen in 3.9% of cases but only 0.3% of controls. INTERPRETATION:The minor T allele of SNP rs662702 disrupts regulation by microRNA-328, which is known to result in increased PAX6 expression in vitro. This study provides, for the first time, evidence of a noncoding genomic variant contributing to the etiology of a common human epilepsy via a posttranscriptional regulatory mechanism.

journal_name

Ann Clin Transl Neurol

authors

Panjwani N,Wilson MD,Addis L,Crosbie J,Wirrell E,Auvin S,Caraballo RH,Kinali M,McCormick D,Oren C,Taylor J,Trounce J,Clarke T,Akman CI,Kugler SL,Mandelbaum DE,McGoldrick P,Wolf SM,Arnold P,Schachar R,Pal DK,Stru

doi

10.1002/acn3.320

subject

Has Abstract

pub_date

2016-06-02 00:00:00

pages

512-22

issue

7

issn

2328-9503

pii

ACN3320

journal_volume

3

pub_type

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