Related Experiment Video
Updated: Oct 16, 2026
Light/dark Transition Test for Mice
Published on: November 13, 2006
Effects of 3,4-methylenedioxy-methamphetamine (MDMA) on anxiety in mice tested in the light-dark box
1Area de Psicobiología, Facultad de Psicología, Universidad de Málaga, Spain.
Abstract:
1. The effects of acute administration of 3,4-methylenedioxymethamphetamine (MDMA; "ecstasy") on anxiety tested in the light/dark box were examined in albino male mice of the OF.1 strain. 2. Animals were evaluated in the light/dark test 30 min after injection of MDMA (1, 8, and 15 mg/kg, i.p) or saline. The following parameters were recorded (for 5 min); (a) number of exploratory rearings in the light and dark sections; (b) number of transitions between the lit and dark areas; (c) time spent in the light and dark areas; (d) latency of the initial movement from the light to the dark area, and (e) locomotor activity in light area. 3. MDMA (8 and 15 mg/kg) produced a significant reduction in exploratory activity (rearings and transitions), without decreasing motility, in comparison with saline-treated mice. However, time spent in lit/dark compartments was not significantly affected by the drug, which could be a consequence of the anti-exploratory properties of MDMA. 4. Overall, the behavioral profile found in the light/dark test indicates an anxiogenic-like activity of MDMA in mice. It is suggested, however, that animal models of anxiety which emphasize a social interaction could be more sensitive to the effects of this substance.
Insights
Acute administration of 3,4-methylenedioxymethamphetamine (MDMA) showed anxiogenic-like activity in mice. Higher doses reduced exploratory behavior without impacting general motility, suggesting complex anxiety responses.
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Science
Background:
- 3,4-methylenedioxymethamphetamine (MDMA), commonly known as "ecstasy", is a psychoactive drug with complex effects.
- Understanding MDMA's impact on anxiety is crucial for assessing its potential risks and therapeutic applications.
Purpose of the Study:
- To investigate the acute effects of MDMA on anxiety-like behavior in a mouse model.
- To determine the dose-dependent behavioral responses to MDMA administration.
Main Methods:
- Male OF.1 mice were administered MDMA (1, 8, 15 mg/kg) or saline intraperitoneally.
- Behavioral parameters including exploratory rearings, transitions, time spent in compartments, and locomotor activity were recorded in the light/dark test 30 minutes post-injection.
Main Results:
- MDMA at 8 and 15 mg/kg significantly reduced exploratory rearings and transitions compared to saline controls.
- Locomotor activity and time spent in light/dark compartments were not significantly altered by MDMA.
- The observed reduction in exploration, without changes in motility, suggests an anxiogenic-like effect.
Conclusions:
- Acute MDMA administration exhibits anxiogenic-like properties in mice, primarily through reducing exploratory behaviors.
- The study suggests that anxiety models incorporating social interaction may offer greater sensitivity to MDMA's effects.
