Cited by 79Psychedelics and Drug StudiesNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

Serotonin (1A) receptor involvement in acute 3,4-methylenedioxymethamphetamine (MDMA) facilitation of social interaction in the rat

Morley, Kirsten C., Arnold, Jonathon C., McGregor, Iain S.·2005·Progress in Neuro-Psychopharmacology and Biological Psychiatry

Abstract

The current study assessed whether various co-administered serotonin (5-HT) receptor antagonists could prevent some of the acute behavioral effects of 3,4-methylenedioxymethamphetamine (MDMA, "Ecstasy") in rats. In the social interaction test, MDMA (5 mg/kg) significantly increased the duration of total social interaction between two conspecifics meeting for the first time. Microanalysis showed that MDMA increased adjacent lying and approach behaviours while reducing anogenital sniffing. MDMA (5 mg/kg) also caused elements of the serotonin syndrome including low body posture and piloerection. In the emergence test, MDMA significantly increased hide time and emergence latency indicating increased anxiety-like behavior. Pretreatment with the 5HT 1A receptor antagonist, WAY 100635 (1 mg/kg), prevented MDMA-induced increases in social interaction and markers of the serotonin syndrome while the 5-HT 1B receptor antagonist GR 55562 (1 mg/kg) and 5-HT 2A receptor antagonist ketanserin (1 mg/kg) were ineffective. The 5-HT 2B/2C receptor antagonist, SB 206553 (2 mg/kg), prevented MDMA-induced prosocial effects but caused pronounced thigmotaxis (hyperactivity at the periphery of the testing chamber). The anxiogenic effect of MDMA on the emergence test was not prevented by pretreatment with any of the 5-HT receptor antagonists tested. These results indicate that prosocial effect of MDMA may involve 5-HT 1A and possibly 5-HT 2B/2C receptors. In contrast, MDMA-induced generalised anxiety, as measured by the emergence test, seems unlikely to involve the 5-HT 1A, 5-HT 1B or 5-HT 2A, 5-HT 2B or 5-HT 2C receptors.

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Crossref · 10.1016/j.pnpbp.2005.04.009

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Authors
Morley, K. C., Arnold, J. C., & McGregor, I. S.
Affiliations
The University of Sydney (AU)
Corresponding author
McGregor, Iain S.
Venue
Progress in Neuro-Psychopharmacology and Biological Psychiatry
Publisher
Elsevier BV
Published
2005-06
Volume
29
Issue
5
Pages
648-657
ISSN
0278-5846 (ISSN-L)
OpenAlex
W1973287358
Cited by
79
References
77
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 3 · 2022: 2 · 2021: 4 · 2020: 4 · 2019: 4 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 5 · 2014: 3 · 2013: 5 · 2012: 3
FWCI
6.17
Type
journal article
Language
en
Open access
closed
Locations
  • Progress in Neuro-Psychopharmacology and Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Health and Medical Research Council
Topics
  • Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
MDMA, ecstasy, 5-HT1A receptor, 5-HT1B receptor, 5-HT2A receptor, prosocial behavior, social interaction, serotonin syndrome, anxiety-like behavior, thigmotaxis, WAY-100635, ketanserin, acute drug effects
MeSH terms
Animals, Hallucinogens, Indoles, Interpersonal Relations, Ketanserin, Male, Piperazines, Pyridines, Serotonin Antagonists, Rats, Wistar, Serotonin Agents, N-Methyl-3,4-methylenedioxyamphetamine, Serotonin Syndrome, Receptor, Serotonin, 5-HT1A, Rats

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