October 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” In this study, researchers found that cochlear hair cell function declined with age in CBA/CaJ mice starting at 10 months, before detectable hearing loss, and was marked by a decrease in cell size and BK channel currents, without effect on MET currents.
October 2025 in “PLoS ONE” In this study, researchers investigated age-related hearing loss in advanced-age CBA/CaJ mice and found combined cochlear damage from chronic sound exposure and metabolic changes linked to oxidative stress, which may require addressing both etiologies for prevention and treatment.
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April 2008 in “Neurobiology of aging” This study identified a new genetic locus, ahl4, on distal Chromosome 10 that contributes to the early-onset, severe hearing loss in A/J mice compared to B6 mice.
August 2018 in “Illinois Digital Environment for Access to Learning and Scholarship (University of Illinois at Urbana-Champaign)” This research observed that chronological age, rather than hearing loss, primarily affects the auditory cortex in aging, and found that brain aging in PolG mice mirrored that of wild-type counterparts, suggesting differential tissue sensitivity to mitochondrial dysfunction.
December 2021 in “OPAL (Open@LaTrobe) (La Trobe University)” This study found that knocking out the Hars2 gene in mouse cochlear hair cells led to mitochondrial dysfunction and ROS stress, resulting in progressive hearing loss and differential effects on inner and outer hair cells.