Overview
- The peer-reviewed paper was published on Aug. 25, 2026, reporting that social isolation reshapes a defined basolateral amygdala to medial prefrontal cortex circuit and linking that change to altered alcohol drinking in mice.
- Researchers housed adult male and female mice either socially or alone and gave them one-hour daily access to water and 15% ethanol over about two weeks, finding isolated males steadily drank more alcohol while isolated females drank less.
- Neural recordings showed neurons projecting from the basolateral amygdala to the medial prefrontal cortex became more excitable in isolated males and less excitable in isolated females, mirroring the opposite drinking behaviors.
- Optogenetic tests established causality: activating the BLA→mPFC pathway made non-isolated males increase alcohol intake like isolated mice and inhibiting that pathway lowered drinking in isolated males.
- Authors caution the work is preclinical and plan follow-up studies to identify what triggers and sustains circuit overactivity, to explain the sex differences, and to test whether the findings translate to humans while noting broader public-health links to rising isolation and global alcohol-use burden.