Characterization of the Brain Functional Architecture of Psychostimulant Withdrawal Using Single-Cell Whole-Brain...

Area of Science:

• Neuroscience
• Systems Neuroscience
• Computational Neuroscience

Background:

• Withdrawal behaviors involve numerous brain regions, but a unifying pathway remains unclear.
• Understanding the brain's functional architecture during withdrawal is crucial for addiction research.

Purpose of the Study:

• To investigate the common neural pathways underlying psychostimulant withdrawal.
• To identify drug-dependent remodeling of brain functional architecture during withdrawal.

Main Methods:

• Administered nicotine, cocaine, or methamphetamine via osmotic minipumps to male C57BL/6J mice for one week.
• Performed whole-brain imaging of neural activity during withdrawal periods (8-12 hours post-drug removal).
• Utilized hierarchical clustering and graph theory to analyze brain functional networks.

Main Results:

• Psychostimulant withdrawal significantly decreased network modularity.
• A shift from cortical-driven to subcortical-driven networks was observed.
• The number of total hub brain regions decreased during withdrawal.

Conclusions:

• Psychostimulant withdrawal induces drug-dependent changes in brain functional architecture.
• Decreased modularity and subcortical network shifts may represent a common pathway for psychostimulant withdrawal.