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Molecular and Cellular Mechanisms of Ecstasy-Induced Neurotoxicity: An Overview

Title
Molecular and Cellular Mechanisms of Ecstasy-Induced Neurotoxicity: An Overview
Type
Another Publication in an International Scientific Journal
Year
2009
Authors
Joao Paulo Capela
(Author)
Other
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Fernando Remiao
(Author)
FFUP
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Maria Lourdes Bastos
(Author)
FFUP
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Andreas Meisel
(Author)
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Felix Carvalho
(Author)
FFUP
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Journal
Vol. 39
Pages: 210-271
ISSN: 0893-7648
Publisher: Springer Nature
Scientific classification
FOS: Medical and Health sciences > Basic medicine
Other information
Authenticus ID: P-003-JVF
Abstract (EN): "Ecstasy" [(+/-)-3,4-methylenedioxymethamphetamine, MDMA, XTC, X, E] is a psychoactive recreational hallucinogenic substance and a major worldwide drug of abuse. Several reports raised the concern that MDMA has the ability to induce neurotoxic effects both in laboratory animals and humans. Despite more than two decades of research, the mechanisms by which MDMA is neurotoxic are still to be fully elucidated. MDMA induces serotonergic terminal loss in rats and also in some mice strains, but also a broader neuronal degeneration throughout several brain areas such as the cortex, hippocampus, and striatum. Meanwhile, in human "ecstasy" abusers, there are evidences for deficits in seronergic biochemical markers, which correlate with long-term impairments in memory and learning. There are several factors that contribute to MDMA-induced neurotoxicity, namely, hyperthermia, monoamine oxidase metabolism of dopamine and serotonin, dopamine oxidation, the serotonin transporter action, nitric oxide, and the formation of peroxinitrite, glutamate excitotoxicity, serotonin 2A receptor agonism, and, importantly, the formation of MDMA neurotoxic metabolites. The present review covered the following topics: history and epidemiology, pharmacological mechanisms, metabolic pathways and the influence of isoenzyme genetic polymorphisms, as well as the acute effects of MDMA in laboratory animals and humans, with a special focus on MDMA-induced neurotoxic effects at the cellular and molecular level. The main aim of this review was to contribute to the understanding of the cellular and molecular mechanisms involved in MDMA neurotoxicity, which can help in the development of therapeutic approaches to prevent or treat the long-term neuropsychiatric complications of MDMA abuse in humans.
Language: English
Type (Professor's evaluation): Scientific
Contact: joaocapela@ff.up.pt; felixdc@ff.up.pt
No. of pages: 62
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