Age effects on tinnitus and hearing loss in CBA/CaJ mice following sound exposure.

Title

Age effects on tinnitus and hearing loss in CBA/CaJ mice following sound exposure.

Creator

Longenecker Ryan J; Chonko Kurt T; Maricich Steve M; Galazyuk Alexander V

Publisher

SpringerPlus

Date

2014
1905-7

Description

Tinnitus is a maladaptive neuropathic condition that develops in humans and laboratory animals following auditory insult. In our previous study we demonstrated that sound exposure leads to development of behavioral evidence of tinnitus in a sample of exposed mice. However, this tinnitus mouse model did not account for long-term maladaptive plasticity or aging, factors that are commonly linked to the human tinnitus population. Therefore the same group of mice was monitored for tinnitus for 360 days post exposure. Tinnitus was assessed behaviorally by measuring gap-induced pre-pulse suppression of the acoustic startle (GPIAS). Cochlear histology was performed on both control (unexposed) and experimental mice to determine whether sound exposure caused any evident cochlear damage. We found that 360 days after exposure the vast majority of exposed mice exhibited similar gap detection deficits as detected at 84 days post exposure. These mice did not demonstrate significant loss of inner/outer hair cells or spiral ganglion neurons compared to the control sample. Lastly, we demonstrated that GPIAS deficits observed in exposed animals were unlikely exclusively caused by cochlear damage, but could be a result of central auditory maladaptive plasticity. We conclude that CBA/CaJ mice can be considered a good animal model to study the possible contribution of age effects on tinnitus development following auditory insult.

Subject

Acoustic trauma; Age-related hearing loss; Gap-induced suppression of the acoustic startle reflex; Tinnitus development

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

542–542

Volume

3

Citation

Longenecker Ryan J; Chonko Kurt T; Maricich Steve M; Galazyuk Alexander V, “Age effects on tinnitus and hearing loss in CBA/CaJ mice following sound exposure.,” NEOMED Bibliography Database, accessed January 18, 2022, https://neomed.omeka.net/items/show/4846.

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