Related Experiment Videos
Wheel running use in dopamine D2L receptor knockout mice
Héctor Vargas-Pérez1, Emiliana Borrelli, José-Luis Díaz
1Departamento de Neurobiología Conductual y Cognitiva, Facultad de Medicina, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Apartado postal 1-1141, Querétaro, Qro. 76001 México, Mexico. vargas@calli.inb.unam.mx
Neuroscience Letters
|July 28, 2004
Summary
Dopamine and opioid systems are crucial for establishing wheel running behavior in mice. Naloxone blocked the initial learning but not the established habit, suggesting distinct roles in reward system consolidation.
Area of Science:
- Neuroscience
- Behavioral Science
Background:
- Wheel running (WR) is a complex behavior influenced by reward systems.
- Dopamine and opioid pathways are implicated in reward-based learning and motivation.
Purpose of the Study:
- To investigate the roles of dopamine and the opioid system in the acquisition and maintenance of wheel running behavior.
- To utilize D2L receptor-deficient mice as a model to understand these neurobiological underpinnings.
Main Methods:
- Utilized D2L receptor-deficient (D2L-/-) mice.
- Administered naloxone (1mg/kg) daily to assess its impact on WR acquisition and maintenance.
- Quantified wheel running behavior by counting wheel turns.
Main Results:
- Naloxone administration significantly inhibited the acquisition of wheel running behavior in D2L-/- mice.
- Established wheel running behavior was not affected by naloxone, indicating its role is primarily in the consolidation phase.
- These results highlight the necessity of both dopamine and opioid systems for WR consolidation.
Conclusions:
- Dopamine and opioid reward systems are essential for the consolidation of wheel running behavior.
- The findings suggest that reward system involvement in wheel running may differ based on the animal's motivational state.