Mutation of the EYA1 gene in patients with branchio-oto syndrome.
Branchio-oto-renal (BOR) and branchio-oto (BO) syndromes are autosomal dominant disorders, characterized by the presence of branchial, otic and renal anomalies of varying degrees of severity. We investigated the presence of EYA1 mutation in two unrelated patients with autosomal dominant hereditary deafness and congenital preauricular fistula. Case 1 had a mutation and polymorphisms, while Case 2 had polymorphisms with no mutations. In Case 1 we detected a heterozygous A-->G mutation at nucleotide 625 resulting in a serine to glycine substitution at codon 189 (S189G). The S189G mutation was not detected in 54 controls (108 alleles). Pure-tone audiometry showed bilateral mixed hearing loss of mild to moderate severity in Case 1. Case 2 had suffered from bilateral hearing loss since the age of 5 years and pure-tone audiometry showed bilateral moderate mixed hearing loss. These results suggest that the S189G mutation is a candidate mutation for BOR/BO syndrome.
Yashima
Takatoshi
T
Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan. yashima.oto@tmd.ac.jp
Noguchi
Yoshihiro
Y
Ishikawa
Kinya
K
Mizusawa
Hidehiro
H
Kitamura
Ken
K
D000328:Adult; D000483:Alleles; D019280:Branchio-Oto-Renal Syndrome / Q000235:genetics*; D003638:Deafness / Q000235:genetics; D005260:Female; D005500:Follow-Up Studies; D005799:Genes, Dominant; D020022:Genetic Predisposition to Disease; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D008875:Middle Aged; D009154:Mutation; D009687:Nuclear Proteins; D010375:Pedigree; D011110:Polymorphism, Genetic; D017027:Protein Tyrosine Phosphatases; D015534:Trans-Activators / Q000235:genetics*
D047908:Intracellular Signaling Peptides and Proteins; D009687:Nuclear Proteins; D015534:Trans-Activators; C104381:EYA1 protein, human; D017027:Protein Tyrosine Phosphatases