Altered neuroendocrine and behavioral responses to m- chlorophenylpiperazine in 3,4-methylenedioxymethamphetamine (MDMA) users

Una D. McCann, Victoria Eligulashvili, Melissa Mertl, Dennis L. Murphy, George A. Ricaurte

Research output: Contribution to journalArticlepeer-review

Abstract

Rationale: (±) 3,4-Methylenedioxymethamphetamine (MDMA, 'Ecstasy') is a popular drug of abuse and a brain serotonin neurotoxin in animals. Growing evidence indicates that humans are also susceptible to MDMA's neurotoxic effects, although few functional consequences of MDMA-induced 5-HT damage have been identified. Objective: The present study sought to determine whether possible differences between MDMA users and control subjects could be unmasked by utilizing a pharmacological challenge with the mixed 5-HT agonist, meta-chlorophenylpiperazine (m-CPP). It was postulated that 5-HT neurotoxicity in MDMA users would be associated with altered 5-HT responsivity, exemplified by altered physiological and behavioral responses to m-CPP. Methods: Twenty-five MDMA users who had not taken MDMA for at least 3 weeks and 25 controls received intravenous placebo (normal saline) and m- CPP (0.08 mg/kg) in a fixed order, single blind design. Repeated measures of mood, physical symptoms, and blood samples for neuroendocrine analyses were collected during the 90 min after each infusion. Results: MDMA users reported more positive and fewer negative emotions and physical symptoms following m- CPP than controls, and were significantly less likely to report an m-CPP- induced panic attack. Male MDMA users had diminished cortisol and prolactin responses to m-CPP. Conclusions: The present data indicate that MDMA users have alterations in 5-HT neuronal function, possibly as a consequence of MDMA-induced brain serotonin neural injury.

Original languageEnglish (US)
Pages (from-to)56-65
Number of pages10
JournalPsychopharmacology
Volume147
Issue number1
DOIs
StatePublished - Dec 1 1999

Keywords

  • Anxiety
  • Cortisol
  • Mood
  • Neurotoxicity
  • Prolactin
  • Serotonin

ASJC Scopus subject areas

  • Pharmacology

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