title: GJB2 (connexin 26) mutations are not a major cause of hearing loss in the Indonesian population.
abstract: Although hereditary hearing loss is a very heterogeneous disorder, variants in one gene, GJB2 (connexin 26), account for up to 50% of autosomal recessive nonsyndromal sensorineural hearing loss in most populations. This study investigates the contribution of GJB2 to autosomal recessive nonsyndromal hearing loss in the Indonesian population. We performed DNA sequence analysis in 120 patients with profound early childhood nonsyndromal hearing loss and in 100 control individuals and identified three novel variations resulting in amino acid substitutions (p.Gly4Asp, p.Thr5Ala, and p.Gly160Arg). Although we proved that p.Gly4Asp was not disease-causing, the pathological nature of p.Thr5Ala and p.Gly160Arg could not be determined. No recurrent disease-causing mutation could be detected in this Indonesian population. These findings are in contrast with the results obtained in other populations where GJB2 is a major cause of congenital recessive hearing loss.
authors.affiliation: Department of Medical Genetics, University of Antwerp, Universiteitsplein, Antwerp, Belgium.
authors.forename: Rikkert L
authors.initials: RL
authors.lastname: Snoeckx
authors.forename: Bulantrisna
authors.initials: B
authors.lastname: Djelantik
authors.forename: Lut
authors.initials: L
authors.lastname: Van Laer
authors.forename: Paul
authors.initials: P
authors.lastname: Van de Heyning
authors.forename: Guy
authors.initials: G
authors.lastname: Van Camp
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D000072259:Connexin 26; D017630:Connexins / Q000235:genetics*; D004247:DNA / Q000737:chemistry / Q000235:genetics; D004252:DNA Mutational Analysis; D034381:Hearing Loss / Q000235:genetics*; D006801:Humans; D007214:Indonesia; D009154:Mutation; D020125:Mutation, Missense
chemical_list: D017630:Connexins; C000607042:GJB2 protein, human; D000072259:Connexin 26; D004247:DNA