Related Experiment Video
Updated: Jul 7, 2026
07:13
Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
Published on: February 10, 2023
Salicylic acid injection before noise exposure reduces permanent threshold shift.
Cahtia Adelman1, Sharon Freeman, Ziv Paz
1Speech and Hearing Center, Hadassah University Hospital, Hebrew University Hadassah Medical School, Jerusalem, Israel.
Audiology & Neuro-Otology
|February 9, 2008
Summary
Salicylic acid administered before noise exposure significantly reduced permanent threshold shift (PTS) in mice. This antioxidant treatment protected against noise-induced hearing loss by temporarily depressing the cochlear amplifier.
Area of Science:
- Ototolaryngology
- Pharmacology
- Auditory Neuroscience
Background:
- Permanent threshold shift (PTS) from noise exposure may stem from cochlear vibrations or reactive oxygen species.
- Temporary depression of the cochlear amplifier or antioxidant administration are potential protective strategies.
Purpose of the Study:
- To assess if salicylic acid, an antioxidant and cochlear amplifier depressant, can mitigate noise-induced hearing loss in mice.
Main Methods:
- Mice received a single salicylic acid injection either before or after 3.5 hours of 113-dB SPL broadband noise exposure.
- Permanent threshold shift (PTS) was measured and compared between groups.
Main Results:
- Mice injected with salicylic acid *before* noise exposure showed significantly smaller PTS.
- No significant difference in PTS was observed between mice treated *after* noise exposure and untreated mice.
Conclusions:
- Pre-exposure administration of salicylic acid offers protection against noise-induced hearing loss.
- The findings suggest targeting the cochlear amplifier with antioxidants before noise exposure is a viable protective strategy.
