Effect of 3-PPP, a putative dopamine autoreceptor agonist, on rat serum prolactin levels

Herbert Y. Meltzer*, Miljana Simonovic

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


3-(3-hydroxyphenyl)-N-n-propylpiperidine (3-PPP) has been reported to be a relatively selective agonist for dopamine (DA) auto-receptors in the striatal and limbic region. We have examined the effect of 3-PPP on rat plasma or serum prolactin levels. 3-PPP produced a non-significant decrease in baseline plasma prolactin levels. It produced a dose-dependent inhibition of the increase in serum prolactin levels produced by gamma-butyrolactone. Both doses of 3-PPP tested completely reversed the increase in serum prolactin levels.produced by reserpine and alpha-methylparatyrosine. These results strongly indicate that 3-PPP directly stimulated DA receptors on pituitary lactotrophes. 3-PPP only weakly inhibited the ability of 3H-spiroperidol to bind to pituitary or striatal membranes, suggesting that it may act at a different DA receptor than classical DA receptor blocking drugs. This DA receptor could have properties in common with the autoreceptors of the mesolimbic and nigrostriatal DA neurons.

Original languageEnglish (US)
Pages (from-to)99-105
Number of pages7
JournalLife Sciences
Issue number1
StatePublished - Jul 6 1981

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • Pharmacology, Toxicology and Pharmaceutics(all)


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