Abstract
The microdialysis technique was used to examine the effect of the neurotoxin domoate, an analog of glutamic acid, on striatal dopamine activity. Our results show that the intracerebral administration of different concentrations of domoate (100 and 500 μM) produced increases in the extracellular levels of dopamine associated to decreases in the extracellular levels of its metabolites dihydroxyphenylacetate and homovanillate from rat striatum. These changes seem to be related according to a time sequence, indicating a possible effect on the metabolism of dopamine. Changes were also observed in locomotor activity (cycling behavior, sniffing around and chewing) in rats during the domoate infusion. The physiological mechanism by which domoate increased dopamine release remains to be worked out.
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Arias, B., Durán, R. & Alfonso, M. In Vivo Release of Dopamine and Its Metabolites from Rat Striatum in Response to Domoic Acid. Neurochem Res 23, 1509–1514 (1998). https://doi.org/10.1023/A:1020919818652
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DOI: https://doi.org/10.1023/A:1020919818652