Specific antagonism of excitant amino acids in the isolated spinal cord of the neonatal rat
European Journal of PharmacologyPublished 1 July 1978
Richard H. Evans, Jeffrey C. Watkins
Citations75
SJR quartileQ1
SJR score1.20
SNIP0.98
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TL;DR
It is proposed that the agents specifically block synaptic transmission mediated by an excitatory amino acid in the isolated rat superior cervical ganglion.
Abstract
The specificity of the neurodepressant actions of D-alpha-aminoadipate, alpha,epsilon-diaminopimelic acid, HA-966 (HAP) and Mg2+ has been investigated. On the isolated spinal cord of the neonatal rat, ventral root depolarizations produced by kainate, substance P, carbachol and noradrenaline were relatively unaffected by the same concentrations (0.25--1 mM) of the agents as those which reduced synaptic activity and ventral root depolarizations produced by N-methyl-D-aspartate (especially), L-aspartate and L-glutamate. The same or higher concentrations of the agents did not affect excitatory transmission in the isolated rat superior cervical ganglion. It is proposed that the agents specifically block synaptic transmission mediated by an excitatory amino acid.
Keywords
MedicineNeuroscienceBiochemistry, Genetics and Molecular Biology
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