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A review of the mechanisms involved in the acute MDMA (ecstasy)-induced hyperthermic response
A Richard Green1, Esther O'shea, M Isabel Colado
1Neuropharmacology Research Group, School of Pharmacy, De Montfort University, The Gateway, Leicester LE1 9BH, UK. richard.green@astrazeneca.com
Abstract:
The predominant severe acute adverse effect following ingestion of 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) by recreational users is hyperthermia which can induce other associated clinical problems and occasionally death. There is no pharmacologically specific treatment. MDMA also induces dose-dependent hyperthermia in experimental animals. This review examines the consequences of MDMA administration on body temperature in humans and rodents. In rats hyperthermia results primarily from dopamine release and is influenced by dose, ambient temperature and other housing conditions. The response is increased in rats with a prior MDMA-induced neurotoxic lesion of 5-hydroxytryptamine (5-HT) nerve endings. Increased MDMA-induced locomotor activity appears to play no role in the hyperthermic response. However, the size of the acute hyperthermic response plays a major role in determining the severity of the subsequent neurotoxicity. These results suggest that any MDMA-induced hyperthermic response will be enhanced in hot, crowded dance club conditions and that ingesting the drug in such conditions increases the possibility of subsequent cerebral neurotoxic effect.
Insights
Recreational 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) use can cause dangerous hyperthermia. Environmental factors like hot clubs can worsen MDMA
Area of Science:
- Neuropharmacology
- Toxicology
- Recreational Drug Effects
Background:
- 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) is a recreational drug associated with severe acute adverse effects.
- Hyperthermia is the predominant severe acute adverse effect of MDMA ingestion, potentially leading to serious clinical issues and death.
- Currently, there is no specific pharmacological treatment for MDMA-induced hyperthermia.
Purpose of the Study:
- To review the effects of MDMA administration on body temperature in both humans and experimental animals (rodents).
- To investigate the mechanisms and influencing factors of MDMA-induced hyperthermia.
- To explore the relationship between hyperthermia and MDMA-induced neurotoxicity.
Main Methods:
- Review of existing literature on MDMA's impact on body temperature in humans and rodents.
- Analysis of factors influencing hyperthermia in rats, including dopamine release, dose, ambient temperature, and housing conditions.
- Examination of the role of pre-existing 5-hydroxytryptamine (5-HT) nerve ending lesions and locomotor activity on MDMA-induced hyperthermia.
Main Results:
- In rats, MDMA-induced hyperthermia is primarily driven by dopamine release and is modulated by dose and environmental conditions.
- Prior neurotoxic lesions to 5-HT nerve endings exacerbate the hyperthermic response to MDMA in rats.
- The severity of acute hyperthermia is a major determinant of subsequent MDMA-induced neurotoxicity.
Conclusions:
- MDMA-induced hyperthermia is likely to be amplified in environments such as hot, crowded dance clubs.
- Ingesting MDMA under such conditions increases the risk of developing subsequent cerebral neurotoxic effects.
- Understanding these factors is crucial for harm reduction strategies related to recreational MDMA use.
