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Front Neurosci. 2021 Jul 26;15:695268. doi: 10.3389/fnins.2021.695268. eCollection 2021.

Preferential Cochleotoxicity of Cisplatin.

Frontiers in neuroscience

Pattarawadee Prayuenyong, David M Baguley, Corné J Kros, Peter S Steyger

Affiliations

  1. Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.
  2. Hearing Sciences, Division of Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom.
  3. National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom.
  4. Nottingham Audiology Services, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom.
  5. School of Life Sciences, University of Sussex, Brighton, United Kingdom.
  6. Translational Hearing Center, Biomedical Sciences, Creighton University, Omaha, NE, United States.

PMID: 34381329 PMCID: PMC8350121 DOI: 10.3389/fnins.2021.695268

Abstract

Cisplatin-induced ototoxicity in humans is more predominant in the cochlea than in the vestibule. Neither definite nor substantial vestibular dysfunction after cisplatin treatment has been consistently reported in the current literature. Inner ear hair cells seem to have intrinsic characteristics that make them susceptible to direct exposure to cisplatin. The existing literature suggests, however, that cisplatin might have different patterns of drug trafficking across the blood-labyrinth-barrier, or different degrees of cisplatin uptake to the hair cells in the cochlear and vestibular compartments. This review proposes an explanation for the preferential cochleotoxicity of cisplatin based on current evidence as well as the anatomy and physiology of the inner ear. The endocochlear potential, generated by the stria vascularis, acting as the driving force for hair cell mechanoelectrical transduction might also augment cisplatin entry into cochlear hair cells. Better understanding of the stria vascularis might shed new light on cochleotoxic mechanisms and inform the development of otoprotective interventions to moderate cisplatin associated ototoxicity.

Copyright © 2021 Prayuenyong, Baguley, Kros and Steyger.

Keywords: cisplatin; cochlea; cochleotoxicity; ototoxicity; vestibular; vestibulotoxicity

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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