Summary
The intraperitoneal administration of d-amphetamine (0.2–2.5 mg/kg) decreases dihydroxyphenylacetic acid (DOPAC) content not only in the caudate nucleus but also in the substantia nigra. This effect persists both in the substantia nigra and in the caudate nucleus after loss of dopamine-sensitive adenylate cyclase and presumably of dopamine receptors, induced by intrastriatal injection of kainic acid. These results indicate that the effect of amphetamine on DOPAC levels in the nigra is not mediated through a strionigral feedback loop.
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Argiolas, A., Fadda, F., Stefanini, E. et al. Evidence for a direct action of amphetamine on dopamine metabolism in the rat substantia Nigra in vivo. Naunyn-Schmiedeberg's Arch. Pharmacol. 301, 171–174 (1978). https://doi.org/10.1007/BF00507033
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DOI: https://doi.org/10.1007/BF00507033