Evidence for genotype-phenotype correlation for OTOF mutations.

ABSTRACT: The aim of this study is to evaluate the auditory phenotype in subjects with OTOF gene mutations to describe genotype-phenotype correlations.Twenty-two affected members from three families with homozygous OTOF mutations were included. Nine subjects were evaluated audiologically with otoscopic examination, pure-tone audiometry, tympanometry with acoustic reflex testing, auditory brain stem responses, and otoacoustic emission tests.Homozygous c.4718T>C (p.Ile1573Thr) mutation was associated with the auditory neuropathy/auditory dys-synchrony (AN/AD) phenotype and with progressive sensorineural hearing loss in four siblings in one family, while homozygous c.4467dupC (p.I1490HfsX19) was associated with severe to profound sensorineural hearing loss without AN/AD in four relatives in another family. Homozygous c.1958delC (p.Pro653LeufsX13) mutation was associated with moderate sensorineural hearing loss without AN/AD in one affected person in an additional family.The audiological phenotype associated with different OTOF mutations appears to be consistently different suggesting the presence of a genotype-phenotype correlation.

SUBMITTER: Yildirim-Baylan M 

PROVIDER: S-EPMC4066206 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature