Dizocilpine attenuates streptomycin-induced vestibulotoxicity in rats.
Neurosci Lett
; 265(2): 71-4, 1999 Apr 16.
Article
in En
| MEDLINE
| ID: mdl-10327171
ABSTRACT
NMDA receptor mediated excitotoxicity contributes substantially to aminoglycoside antibiotic-induced cochlear damage. Since vestibular as well as cochlear hair cells have glutamatergic synapses, aminoglycoside-induced vestibulotoxicity may also have an excitotoxic component. This hypothesis was tested by examining the effects of the uncompetitive NMDA receptor antagonist dizocilpine on streptomycin-induced vestibulotoxicity. Streptomycin-treated rats exhibited almost complete destruction of sensory hair cells in the crista ampullaris, vestibular impairment in the drop test, and hyperkinesia. Concurrent treatment with dizocilpine not only rescued a substantial population of sensory hair cells in the cristae, but prevented the attendant hyperkinesis and vestibular impairments. These results indicate that excitotoxic mechanisms contribute to aminoglycoside-induced vestibulotoxicity and that NMDA antagonists may be useful in attenuating aminoglycoside ototoxicity.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Streptomycin
/
Vestibule, Labyrinth
/
Dizocilpine Maleate
/
Excitatory Amino Acid Antagonists
/
Anti-Bacterial Agents
Limits:
Animals
Language:
En
Journal:
Neurosci Lett
Year:
1999
Document type:
Article
Affiliation country:
United States