Long-term neurobiological consequences of ecstasy: A role for pre-existing trait-like differences in brain monoaminergic functioning?

Alinde E. Wallinga*, Sietse F. de Boer, Ramon A. Granneman, Jaap M. Koolhaas, Bauke Buwalda

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

2 Citaten (Scopus)
296 Downloads (Pure)

Samenvatting

This study investigated whether trait-like differences in brain monoaminergic functioning relate to differential vulnerability for the long-term neurochemical depletion effects of MDMA. Genetically selected aggressive (SAL) and non-aggressive (LAL) house-mice differing in baseline serotonergic and dopaminergic neurotransmission were administered MDMA. An acute binge-like MDMA injection protocol (three times, using either of the dosages of 0, 5, 10 and 20 mg/kg i.p. with 3 h interval) was employed. Three and 28 days after treatment with MDMA induced a dose-dependent depletion of striatal dopamine and its metabolites that did not differ between SAL and LAL mice. Similarly, the dose-dependent MDMA-induced serotonergic depletion did not differ between lines 3 days after treatment. Interestingly, 28 days after MDMA in LAL mice, 5-HT and 5-HIAA levels were still significantly depleted after treatment with 3 x 10 mg/kg, while in SAL mice 5-HT depletion was only seen after the highest dosage. Surprisingly. LAL mice did not show any long-term 5-HT depletion after treatment with the highest dose. In conclusion, only LAL mice are able to restore initial severe loss of MDMA-evoked 5-HT and 5-HIAA levels. SAL and LAL mice are differentially susceptible for the long-term but not short-term MDMA-induced serotonergic depletion in the striatum. The differentiation between both lines in the long-term striatal serotonergic response to MDMA seems to depend on the capacity of the brain to adapt to the short-term depletion of monoaminergic levels and may somehow be related to individual, trait-like characteristics of brain monoaminergic systems. (C) 2009 Elsevier Inc. All rights reserved.

Originele taal-2English
Pagina's (van-tot)227-233
Aantal pagina's7
TijdschriftPharmacology, Biochemistry and Behavior
Volume94
Nummer van het tijdschrift2
DOI's
StatusPublished - dec-2009

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