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. 1972 Aug;69(8):2145–2149. doi: 10.1073/pnas.69.8.2145

Dopamine-Sensitive Adenylate Cyclase in Caudate Nucleus of Rat Brain, and Its Similarity to the “Dopamine Receptor”

John W Kebabian 1, Gary L Petzold 1, Paul Greengard 1
PMCID: PMC426888  PMID: 4403305

Abstract

An adenylate cyclase that is activated specifically by low concentrations of dopamine has been demonstrated in homogenates of caudate nucleus of rat brain. A half-maximal increase in the activity of the enzyme occurred in the presence of 4 μM dopamine. Concentrations of dopamine as low as 0.3 μM stimulated the activity of the enzyme. The adenylate cyclase activity of the homogenates was also stimulated by low concentrations of apomorphine, a substance known to mimic the physiological and pharmacological effects of dopamine. The stimulatory effect of dopamine was blocked by low concentrations of either haloperidol or chlorpromazine, agents known to block the actions of dopamine in mammalian brain. The results suggest that dopamine-sensitive adenylate cyclase may be the receptor for dopamine in mammalian brain. The isolation of this enzyme from caudate nucleus should facilitate the search for new therapeutic agents useful in the treatment of extrapyramidal diseases.

Keywords: extrapyramidal disease, ganglia, neurotransmitter, dihydroxyphenylalanine, Parkinson's disease

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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