Localization of idiopathic generalized epilepsy on chromosome 6p in families of juvenile myoclonic epilepsy patients.

Abstract:

:Juvenile myoclonic epilepsy (JME) is a distinct subform of idiopathic generalized epilepsy of adolescence. Linkage studies with Bf and serologic HLA markers in families of JME patients have shown a tight linkage on chromosome 6. We present a linkage analysis with HLA-DQ restriction fragment length polymorphisms on more extended families, paying particular attention to the epilepsy type of the affected family members. We studied 21 families of JME patients with a total of 143 family members and obtained a highest logarithm of the odds (lod) score of 3.9 (theta m = 0.01, theta f = 0.01) assuming a dominant mode of inheritance and 70% penetrance when family members with JME, absence epilepsy, or epilepsy with generalized tonic-clonic seizures (GTCS) were considered as affected. When we also classified clinically normal family members with generalized spike-wave discharges in the EEG as "affected," the maximum lod score was 4.1 (theta m = 0.01, theta f = 0.3) under a dominant mode of inheritance and 90% penetrance. These findings support the conclusion that a gene locus for a group of idiopathic generalized epilepsies (JME, epilepsy with absences, and epilepsy with GTCS) maps to chromosome 6p.

journal_name

Neurology

journal_title

Neurology

authors

Durner M,Sander T,Greenberg DA,Johnson K,Beck-Mannagetta G,Janz D

doi

10.1212/wnl.41.10.1651

subject

Has Abstract

pub_date

1991-10-01 00:00:00

pages

1651-5

issue

10

eissn

0028-3878

issn

1526-632X

journal_volume

41

pub_type

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