Application of deafness diagnostic screening panel based on deafness mutation/gene database using invader assay

Area of Science:

• Genetics
• Otolaryngology
• Molecular Biology

Background:

• Genetic heterogeneity of deafness hinders clinical application of gene identification.
• A need exists for efficient diagnostic strategies for hearing loss mutations.

Purpose of the Study:

• To design and validate a comprehensive diagnostic strategy for simultaneous detection of deafness gene mutations.
• To evaluate the efficacy of the Invader assay for screening known deafness-related mutations.

Main Methods:

• Developed a diagnostic strategy using a mutation/gene database and Invader assay screening.
• Screened 41 known mutations in nine deafness genes among 338 Japanese patients with congenital or childhood-onset bilateral sensorineural hearing loss.

Main Results:

• Identified mutations in GJB2, SLC26A4, and/or mitochondrial 12S rRNA in 100 (29.6%) subjects.
• These three genes represent the major causative factors for deafness in the studied Japanese population.
• The Invader assay demonstrated high sensitivity and accuracy in mutation detection.

Conclusions:

• The developed strategy effectively identifies major deafness gene mutations in Japanese patients.
• The Invader assay is a valuable tool for improving medical management and genetic counseling for hearing impairment.
• This approach facilitates efficient genetic screening for congenital and childhood-onset hearing loss.