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Administration of Δ9-Tetrahydrocannabinol (THC) in Adolescent and Adult Mice
Published on: August 1, 2025
THC Prevents MDMA Neurotoxicity in Mice
Clara Touriño1, Andreas Zimmer, Olga Valverde
1Departament de Ciències Experimentals i de la Salut, Grup de Recerca en Neurobiologia del Comportament (GRNC), Universitat Pompeu Fabra, Barcelona, Spain. clara.tourino@upf.edu
Plos One
|February 23, 2010
Summary
Tetrahydrocannabinol (THC) protects against MDMA neurotoxicity by reducing hyperthermia, primarily through CB1 receptor activation. This finding is crucial for understanding combined drug effects and potential harm reduction strategies.
Area of Science:
- Neuropharmacology
- Toxicology
- Cannabinoid Research
Background:
- Recreational users often combine MDMA (ecstasy) and cannabis, despite their opposing pharmacological effects.
- MDMA can cause hyperthermia and neurotoxicity, particularly at warmer temperatures.
- Tetrahydrocannabinol (THC) exhibits hypothermic, anti-inflammatory, and antioxidant properties.
Purpose of the Study:
- To investigate the potential neuroprotective effects of THC against MDMA-induced neurotoxicity.
- To elucidate the mechanisms underlying THC's potential protective actions, focusing on receptor involvement.
Main Methods:
- Mice were administered a neurotoxic regimen of MDMA, with or without THC pretreatment, at room and warm temperatures.
- Assessed body temperature, striatal glial activation, and dopamine (DA) terminal loss.
- Utilized CB1 and CB2 receptor antagonists (AM251, AM630) and knockout mice (CB1, CB2, CB1/CB2) to explore receptor mediation.
Main Results:
- THC prevented MDMA-induced hyperthermia and glial activation at both temperatures.
- MDMA-induced DA terminal loss occurred only at warm temperatures and was reversed by THC.
- THC's neuroprotective effects were dependent on CB1 receptor activation; CB2 receptors played a secondary role in reducing neuroinflammation.
Conclusions:
- THC demonstrates significant neuroprotection against MDMA-induced toxicity, primarily by mitigating hyperthermia via CB1 receptor activation.
- CB2 receptors contribute to the anti-inflammatory effects observed in this neuroprotection.
- Findings highlight the complex interactions between MDMA and THC and suggest a potential harm reduction mechanism.
