[Establishment of computer-based video-tracking conditioned place preference experiment system in mice]

Area of Science:

• Neuroscience
• Behavioral Pharmacology
• Animal Models

Background:

• Conditioned place preference (CPP) is a widely used behavioral paradigm to study drug reward and addiction.
• Accurate and reliable measurement of animal behavior is crucial for CPP studies.
• Existing CPP systems may have limitations in precision and automation.

Purpose of the Study:

• To establish and validate a computer-based video-tracking conditioned place preference (CPP) system in mice.
• To assess the system's reliability using morphine as a drug of abuse.
• To investigate morphine-induced locomotor activity and sensitization within the CPP framework.

Main Methods:

• Development of a CPP system integrating a computer, camera, soundproof box, shuttle box, and analytical software.
• Evaluation of the system by administering varying doses of morphine (1-10 mg/kg) or saline to mice.
• Measurement of time spent in drug-paired compartments and locomotor activity.

Main Results:

• Morphine administration (1, 3, 5, 10 mg/kg) significantly increased time spent in the drug-paired compartment compared to saline.
• Locomotor activity was enhanced by moderate and high doses of morphine.
• Behavioral sensitization was observed at 5 mg/kg and 10 mg/kg morphine doses in the drug-paired compartment.

Conclusions:

• The developed computer-based video-tracking CPP system is reliable and stable for use in mice.
• The system effectively captures drug-induced place preference and locomotor activity.
• This validated system provides a robust tool for addiction research and behavioral pharmacology studies.