Cholinergic Interneurons in the Accumbal Shell Region Regulate Binge Alcohol Self-Administration in Mice: An In Vivo...

Area of Science:

• Neuroscience
• Addiction Research
• Alcohol Use Disorder

Background:

• Cholinergic interneurons (CIN) in the nucleus accumbens (NAc) modulate alcohol consumption.
• Previous studies suggest manipulating CIN activity can affect binge drinking behaviors.

Purpose of the Study:

• To investigate the real-time relationship between binge alcohol consumption and CIN activity in the NAc shell (NAcSh).
• To test the hypothesis that binge drinking increases NAcSh CIN activity.

Main Methods:

• Utilized the Drinking in the Dark (DID) mouse model for binge alcohol consumption.
• Employed in vivo microendoscopic calcium imaging to monitor NAcSh CIN activity during alcohol intake.
• Compared alcohol-exposed mice to a sucrose control group.

Main Results:

• Alcohol consumption significantly increased the frequency and amplitude of CIN discharge activity in the NAcSh.
• Calcium transients in NAcSh CIN were markedly higher in the alcohol group compared to controls.
• These findings demonstrate a direct correlation between binge drinking and heightened CIN activity.

Conclusions:

• CIN activity in the NAcSh is critically involved in alcohol self-administration.
• Targeting CIN represents a potential therapeutic avenue for treating alcohol use disorder (AUD).
• This research highlights the neurobiological mechanisms underlying binge drinking.