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MDL72222, a serotonin 5-HT3 receptor antagonist, blocks MDMA's ability to establish a conditioned place preference

E J Bilsky1, L D Reid

  • 1Department of Psychology, Rensselaer Polytechnic Institute, Troy, NY 12180.

Pharmacology, Biochemistry, and Behavior
|June 1, 1991
PubMed

Insights

A 5-HT3 antagonist, MDL72222, blocked the conditioned place preference (CPP) induced by Methylenedioxymethamphetamine (MDMA) in rats. This suggests 5-HT3 receptor interactions are key to understanding MDMA

Area of Science:

  • Neuroscience
  • Pharmacology
  • Behavioral Science

Background:

  • Methylenedioxymethamphetamine (MDMA) is known to induce positive conditioned place preference (CPP) in rodent models.
  • Understanding the neurobiological mechanisms underlying drug-induced CPP is crucial for addiction research.

Purpose of the Study:

  • To investigate the role of the 5-HT3 receptor in mediating MDMA-induced CPP.
  • To assess the effects of a specific 5-HT3 antagonist, MDL72222, on MDMA's ability to establish CPP.

Main Methods:

  • Rats were administered MDMA and tested for CPP.
  • The effects of co-administering MDL72222 (0.03 mg/kg) with MDMA on CPP acquisition were evaluated.

Main Results:

  • A dose of 0.03 mg/kg of MDL72222 successfully blocked the establishment of MDMA-induced CPP in rats.
  • This indicates a significant involvement of the 5-HT3 receptor system in the rewarding effects of MDMA.

Conclusions:

  • The 5-HT3 receptor system plays a critical role in the development of MDMA-associated reward.
  • Compounds targeting the 5-HT3 receptor may be valuable tools for studying the pharmacology of self-administered drugs like MDMA.

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