Transcriptomics

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Molecular changes associated with biological aging of cochlear hair cells


ABSTRACT: Age-related hearing loss (ARHL) is a progressive sensorineural hearing loss that occurs as people get older. As many as 35% to 50% of the population aged between 65 and 75 have ARHL. Although age-related changes in the central auditory system can contribute to hearing impairment, degeneration of the mechanosensitive hair cells in the cochlea is the prevalent cause of ARHL. The molecular mechanisms of hair cell aging are largely unknown. To provide a comprehensive dataset of age-related genes and pathways in hair cells, we individually collected inner and outer hair cells, the two types of sensory receptor cells in the cochlea, from 9- and 26-month-old CBA/J mice and performed cell type-specific transcriptomic analysis. Our analysis showed a significant reduction of the expression of genes related to hair cell structure and function such as Tmc1, Kcnq4, Kcnj13, Slc7a14, Slc17a8, Chrna9/Chrna10, and Slc26a5. Our hair cell-specific transcriptome analysis provides a rich resource for mechanistic studies of biological aging of cochlear hair cells.

ORGANISM(S): Mus musculus

PROVIDER: GSE153882 | GEO | 2022/03/01

REPOSITORIES: GEO

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