Distinct cochlear cell types associated with genetic susceptibility to sensory and metabolic hearing loss in older adults.

Genes linked to sensory and metabolic components of age-related hearing loss are most highly expressed in hair cells and spiral ganglion neurons, respectively, in the cochlea.

• Why it matters: Understanding the cellular and genetic basis of hearing loss subtypes is crucial for developing targeted prevention and treatment strategies, as current approaches are limited by the heterogeneity of the condition.
• What they did: Researchers integrated human GWAS data with mouse cochlear single-cell RNA sequencing data using the single-cell disease relevance score tool, analyzing gene expression patterns across cell types and subpopulations.
• The result: Findings suggest distinct genetic and cellular risk profiles for ARHL subtypes, indicating that targeting specific cochlear cell populations at different life stages may improve prevention and therapy.