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- W2047060305 abstract "Glutamate (Glu) is neurotoxic in the neonatal rat cochlea, producing hearing impairment which is largely due to the death of spiral ganglion cells, whereas the receptor hair cells are spared. Dendritic processes of the spiral ganglion are postsynaptic to the primary afferent synapse of the auditory system. The experiments reported here were designed to test whether this apparent excitotoxicity can be blocked by Glu antagonists. The broad-spectrum antagonist kynurenic acid (KYNA) was coadministered with Glu initially to determine whether the high-frequency hearing deficit caused by Glu may be mediated by excitatory amino acid receptors. Subsequently, the N-methyl-D-aspartate (NMDA)-specific receptor blocker MK-801 was used to test whether NMDA receptors may be involved in the effect. Both antagonists partially blocked the high-frequency hearing impairment caused by Glu. The blocker-alone control groups exhibited mid-frequency effects of unknown origin. The significant antagonism of Glu-induced impairment is consistent with the hypothesis that Glu or a similar excitatory amino acid is an important afferent transmitter in the cochlea." @default.
- W2047060305 created "2016-06-24" @default.
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- W2047060305 date "1992-09-01" @default.
- W2047060305 modified "2023-10-16" @default.
- W2047060305 title "Glutamate neurotoxicity in the developing rat cochlea is antagonized by kynurenic acid and MK-801" @default.
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- W2047060305 doi "https://doi.org/10.1016/0006-8993(92)91096-w" @default.
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