Genetics of vestibular disorders: pathophysiological insights

Area of Science:

• Genetics
• Neuroscience
• Otolaryngology

Background:

• Vestibular disorders, including motion sickness and vestibular migraine, are common and often have a familial link.
• Bilateral vestibular hypofunction and certain Mendelian sensorineural hearing loss types can also involve vestibular dysfunction.
• Familial aggregation is notable in Meniere's disease, suggesting a genetic component.

Purpose of the Study:

• To explore recent advancements in the genetics of vestibular disorders with familial aggregation.
• To identify novel genetic variants associated with familial Meniere's disease.

Main Methods:

• Utilized whole exome sequencing.
• Employed bioinformatics tools for data analysis.
• Investigated families with a history of vestibular disorders.

Main Results:

• Identified novel variants in the DTNA and FAM136A genes in familial Meniere's disease.
• Observed clinical heterogeneity within families, suggesting variable penetrance and polygenic inheritance.
• Confirmed genetic links in some sensorineural hearing loss subtypes with vestibular dysfunction.

Conclusions:

• Whole exome sequencing and bioinformatics are effective strategies for discovering the genetic basis of familial vestibular disorders.
• The findings contribute to understanding the genetic architecture of Meniere's disease and related conditions.
• Further research can build upon these genomic strategies to uncover more causative genes.