Augmented currents of an HCN2 variant in patients with febrile seizure syndromes.

Abstract:

:The genetic architecture of common epilepsies is largely unknown. HCNs are excellent epilepsy candidate genes because of their fundamental neurophysiological roles. Screening in subjects with febrile seizures and genetic epilepsy with febrile seizures plus revealed that 2.4% carried a common triple proline deletion (delPPP) in HCN2 that was seen in only 0.2% of blood bank controls. Currents generated by mutant HCN2 channels were approximately 35% larger than those of controls; an effect revealed using automated electrophysiology and an appropriately powered sample size. This is the first association of HCN2 and familial epilepsy, demonstrating gain of function of HCN2 current as a potential contributor to polygenic epilepsy.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Dibbens LM,Reid CA,Hodgson B,Thomas EA,Phillips AM,Gazina E,Cromer BA,Clarke AL,Baram TZ,Scheffer IE,Berkovic SF,Petrou S

doi

10.1002/ana.21909

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

542-6

issue

4

eissn

0364-5134

issn

1531-8249

journal_volume

67

pub_type

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