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Open AccessArticle

Effect of Specific Retinoic Acid Receptor Agonists on Noise-Induced Hearing Loss

1
Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul 03722, Korea
2
Department of Otorhinolaryngology, Chonbuk National University College of Medicine, Jeonju 54907, Korea
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(18), 3428; https://doi.org/10.3390/ijerph16183428
Received: 3 July 2019 / Revised: 10 September 2019 / Accepted: 11 September 2019 / Published: 16 September 2019
(This article belongs to the Special Issue Environmental Exposures and Hearing Loss)
Noise is one of the most common causes of hearing loss in industrial countries. There are many studies about chemical agents to prevent noise-induced hearing loss (NIHL). However, there is no commercially available drug yet. Retinoic acid is an active metabolite of Vitamin A; it has an anti-apoptic role in NIHL. This study aims to verify the differences among selective agonists of retinoic acid receptors (RARs) in NIHL. All-trans retinoic acid (ATRA), AM80 (selective retinoic acid receptor α agonist), AC261066 (Selective retinoic acid receptor β1 agonist), and CD1530 (Selective retinoic acid λ agonist) were injected to 6–7 weeks old CJ5BL/6 mice before noise (110 dB for 3 h) exposure. In the auditory brainstem response test pre-, post 1, 3, and 7 days after noise exposure, not only ATRA but all kinds of selective RAR agonists showed protective effects in hearing threshold and wave I amplitude. Though there was no significant difference in the level of protective effects between agonists, α agonist showed the most prominent effect in preserving hearing function as well as outer hair cells after noise exposure. In conclusion, selective agonists of RAR demonstrate comparable protective effects against NIHL to retinoic acid. Given that these selective RAR agonists have less side effects than retinoic acid, they may be promising potential drugs against NIHL. View Full-Text
Keywords: Noise-induced hearing loss; sensorineural hearing loss; retinoic acid; selective RAR agonists Noise-induced hearing loss; sensorineural hearing loss; retinoic acid; selective RAR agonists
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Kwak, S.H.; Nam, G.-S.; Bae, S.H.; Jung, J. Effect of Specific Retinoic Acid Receptor Agonists on Noise-Induced Hearing Loss. Int. J. Environ. Res. Public Health 2019, 16, 3428.

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