title: Four new families with autosomal dominant partial epilepsy with auditory features: clinical description and linkage to chromosome 10q24.
abstract: OBJECTIVE
  Autosomal dominant partial epilepsy with auditory features (ADPEAF) is a rare form of nonprogressive lateral temporal lobe epilepsy characterized by partial seizures with auditory disturbances. The gene predisposing to this syndrome was localized to a 10-cM region on chromosome 10q24. We assessed clinical features and linkage evidence in four newly ascertained families with ADPEAF, to refine the clinical phenotype and confirm the genetic localization.
  
  
  METHODS
  We genotyped 41 individuals at seven microsatellite markers spanning the previously defined 10-cM minimal genetic region. We conducted two-point linkage analysis with the ANALYZE computer package, and multipoint parametric and nonparametric linkage analyses as implemented in GENEHUNTER2.
  
  
  RESULTS
  In the four families, the number of individuals with idiopathic epilepsy ranged from three to nine. Epilepsy was focal in all of those with idiopathic epilepsy who could be classified. The proportion with auditory symptoms ranged from 67 to 100%. Other ictal symptoms also were reported; of these, sensory symptoms were most common. Linkage analysis showed a maximum 2-point LOD score of 1.86 at (theta=0.0 for marker D10S603, and a maximum multipoint LOD score of 2.93.
  
  
  CONCLUSIONS
  These findings provide strong confirmation of linkage of a gene causing ADPEAF to chromosome 10q24. The results suggest that the susceptibility gene has a differential effect on the lateral temporal lobe, thereby producing the characteristic clinical features described here. Molecular studies aimed at the identification of the causative gene are underway.
authors.affiliation: G. H. Sergievsky Center, Columbia University, New York, NY 10032, USA.
authors.forename: Melodie R
authors.initials: MR
authors.lastname: Winawer
authors.forename: Filippo
authors.initials: F
authors.lastname: Martinelli Boneschi
authors.forename: Christie
authors.initials: C
authors.lastname: Barker-Cummings
authors.forename: Joseph H
authors.initials: JH
authors.lastname: Lee
authors.forename: Jianjun
authors.initials: J
authors.lastname: Liu
authors.forename: Constantine
authors.initials: C
authors.lastname: Mekios
authors.forename: T Conrad
authors.initials: TC
authors.lastname: Gilliam
authors.forename: Timothy A
authors.initials: TA
authors.lastname: Pedley
authors.forename: W Allen
authors.initials: WA
authors.lastname: Hauser
authors.forename: Ruth
authors.initials: R
authors.lastname: Ottman
mesh_terms: D000328:Adult; D002648:Child; D002879:Chromosomes, Human, Pair 10; D004828:Epilepsies, Partial / Q000150:complications / Q000235:genetics*; D005192:Family Health; D005260:Female; D005799:Genes, Dominant; D008040:Genetic Linkage; D006212:Hallucinations / Q000209:etiology / Q000235:genetics*; D006801:Humans; D008297:Male; D010375:Pedigree; D010641:Phenotype