Effect of dopamine antagonism on the behavioral and hemodynamic responses to cocaine in piglets

Constance L. Monitto, Pamela Feuer, Maureen O’Rourke, Leslie Shaw, Dean Kurth

Research output: Contribution to journalArticlepeer-review

Abstract

Cocaine (1.5 mg/kg i.v.) was administered to awake newborn piglets that were pretreated with either intravenous saline (placebo) or SCH23390, a dopamine antagonist, to study dopamine’s role in cocaine’s vascular and behavioral actions. In the placebo group, cocaine increased the locomotor activity and cerebellar and cardiac blood flow (31 ± 36 and 72 ± 66%), but decreased choroid plexus and renal blood flow (47 ± 23 and 18 ± 19%). In the SCH23390-treated group, cocaine did not affect organ blood flow or locomotor activity. Cocaine transiently increased the mean arterial blood pressure in both groups (10 ± 7 and 18 ± 13%). These data indicate that the behavioral and blood flow responses to cocaine in cerebellum, choroid plexus, heart, and kidneys are mediated by dopamine, whereas the arterial pressor response to cocaine is not.

Original languageEnglish (US)
Pages (from-to)52-59
Number of pages8
JournalNeonatology
Volume70
Issue number1
DOIs
StatePublished - Jan 1 1996

Keywords

  • Cocaine
  • Cocaine
  • Cocaine
  • Dopamine antagonism
  • Neonate piglets
  • SCH23390
  • Tissue blood flow

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Developmental Biology

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