Detection of hereditary hearing loss gene by DNA microarray

Area of Science:

• Genetics
• Molecular Biology
• Audiology

Background:

• Sporadic deafness affects a significant portion of the population.
• Identifying genetic causes is crucial for diagnosis and management.
• Current genetic testing methods may not be sufficiently rapid or high-throughput for clinical needs.

Purpose of the Study:

• To screen for deafness-causing genes in patients with clinically sporadic deafness.
• To evaluate the clinical application value of DNA microarray technology for deafness gene detection.

Main Methods:

• DNA was extracted from patient blood samples and amplified using PCR.
• Hybridization was performed using a DNA microarray.
• Nine mutation sites across four common Chinese deafness genes (GJB2, SLC26A4, mitochondrion 12SrRNA, GJB3) were analyzed.

Main Results:

• Mutations were detected in 7 out of 24 patients, a positive rate of 29.17%.
• Specific mutations identified include GJB2 (16.67%), SLC26A4 (4.17%), and mitochondrion 12SrRNA (8.33%).
• No mutations were found in the GJB3 gene.

Conclusions:

• Gene chip technology enables rapid, high-throughput detection of hereditary hearing loss mutations.
• This technology meets the clinical demands for efficient deaf gene detection.
• The findings support the utility of DNA microarrays in diagnosing sporadic deafness.