Are vestibular hair cells excited to death by aminoglycoside antibiotics?

Article type: Research Article

Authors: Smith, Paul F.^;

Affiliations: Department of Pharmacology, School of Medical Sciences, University of Otago Medical School, Dunedin, New Zealand

Note: [*] Correspondence: P.F. Smith, above address, Tel.: +64 3 479 5747; Fax: +64 3 479 9140; E-mail: paul.smith@stonebow.otago.ac.nz

Abstract: Aminoglycoside antibiotics are commonly prescribed throughout the world for the treatment of serious gram-negative bacterial infections. However, their use is limited by nephrotoxicity and ototoxicity. Although the traditional explanation for their ototoxicity in cochlear and vestibular hair cells has been the inhibition of mitochondrial protein synthesis, evidence is accumulating to suggest that many aminoglycosides cause excitotoxicity in hair cells as a result of their agonist action at the polyamine site on the N- methyl-D-aspartate (NMDA) receptor. The aim of this minireview is to summarise and critically evaluate this evidence and to consider the therapeutic implications of this hypothesis

Keywords: aminoglycoside antibiotics, ototoxicity, vestibulotoxicity, excitotoxicity, glutamate

DOI: 10.3233/VES-2000-10101

Journal: Journal of Vestibular Research, vol. 10, no. 1, pp. 1-5, 2000