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A model of ethanol self-administration in head-fixed mice
Amy L Ward1, Kion T Winston1, Sophie Buchmaier1
1Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina, USA.
Alcohol, Clinical & Experimental Research
|August 8, 2025
Summary
Researchers developed a head-fixed model for studying alcohol dependence in mice. This model enables advanced neuroimaging techniques to investigate the neural circuits underlying alcohol use disorder and relapse behaviors.
Area of Science:
- Neuroscience
- Addiction Research
- Animal Models
Background:
- Two-photon (2P) imaging offers high-resolution neural circuit analysis in vivo.
- Integrating 2P imaging with alcohol use disorder (AUD) research is crucial for understanding neural adaptations.
- A lack of head-fixed models has limited the application of advanced neurotechnologies in AUD studies.
Purpose of the Study:
- To develop a head-fixed rodent model for ethanol self-administration.
- To enable the integration of advanced neurotechnologies for studying alcohol dependence.
- To investigate the neural mechanisms underlying alcohol seeking and relapse.
Main Methods:
- A head-fixed model was established where mice self-administered ethanol.
- Lever pressing was acquired, extinguished, and then tested for cue- and ethanol-induced reinstatement.
- Behavioral responses were monitored to assess ethanol-directed seeking and relapse.
Main Results:
- Mice reliably self-administered ethanol in a head-fixed setup.
- Blood ethanol concentrations correlated with reward levels.
- Cue and ethanol priming successfully reinstated ethanol seeking, mirroring relapse phenomena.
Conclusions:
- The developed head-fixed model facilitates the use of advanced neurotechnologies.
- This model enhances the study of neural adaptations in alcohol dependence.
- It provides a platform for understanding computations underlying AUD and relapse.
