Blockade or stimulation of D1 dopamine receptors attenuates cue reinstatement of extinguished cocaine-seeking behavior in rats

Andrea T. Alleweireldt, Suzanne M. Weber, Kenneth F. Kirschner, Breanna L. Bullock, Janet Neisewander

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

Rationale: D1 dopamine receptor antagonists and agonists attenuate cocaine reinstatement of cocaine-seeking behavior (i.e., responding in the absence of cocaine reinforcement). Objectives: The present study investigated the effects of a D1 antagonist (SCH-23390), partial agonist (SKF-38393), and full agonist (SKF-81297) on reinstatement of cocaine-seeking behavior elicited by presentation of cocaine-paired cues. Methods: Rats that had been trained to self-administer cocaine with a light/tone stimulus complex paired with each infusion underwent extinction across days. After responding diminished, rats were given response-contingent access to the cocaine-paired stimulus complex. The effects of SCH-23390 (0-10.0 μg/kg), SKF-38393 (0-3.0 mg/kg), and SKF-81297 (0-3.0 mg/kg) on cue reinstatement of cocaine-seeking behavior were examined. The ability of the two D1 agonists to independently reinstate cocaine-seeking behavior and the effects of SKF-81297 on cocaine reinstatement were also examined. To investigate the possibility of behavioral interference, the effects of SKF-38393 and SKF-81297 on grooming and stereotypy were assessed. Results: SCH-23390 and SKF-81297, but not SKF-38393, attenuated cue reinstatement. However, while SKF-81297 dose-dependently increased response latency, SCH-23390 did not. SKF-81297 also independently reinstated responding at the two lowest doses tested while SKF-38393 had no effect. Furthermore, SKF-81297 decreased cocaine reinstatement and increased response latency only at the highest dose. Finally, stereotypy was observed at all doses of SKF-81297 that also decreased responding, although the patterns of changes in these behaviors did not completely correspond. Conclusions: While the antagonist and full agonist produced similar effects on cocaine-seeking behavior, only the agonist increased response latency, suggesting that different processes mediate the effects of these drugs.

Original languageEnglish (US)
Pages (from-to)284-293
Number of pages10
JournalPsychopharmacology
Volume159
Issue number3
DOIs
StatePublished - Feb 23 2002

Keywords

  • Conditioned reinforcement
  • Relapse
  • SCH-23390
  • SKF-38393
  • SKF-81297
  • Stereotyped behavior

ASJC Scopus subject areas

  • Pharmacology

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