CHAPEL HILL,N.C., February 29, 2024 – repeated binge drinking doesn’t just lead to a hangover; it rewires your brain to *feel* bad, even when you’re sober. New research pinpoints neuroinflammation, triggered by immune cells in the brain, as a key driver of the prolonged negative emotions linked to alcohol use disorder (AUD).
Brain inflammation Fuels the Cycle of Addiction
The study offers a potential new avenue for treating AUD,a condition affecting nearly 95 million people worldwide.
- Repeated binge drinking causes lasting neuroinflammation.
- Activated microglia-immune cells in the brain-are central to this process.
- Blocking microglial activation can prevent alcohol-induced mood disorders.
- The findings suggest immune therapies could offer a new treatment approach for AUD.
Q: Can alcohol really change how your brain feels, even when you’re not drinking? A: Yes. Research shows that repeated binge drinking triggers neuroinflammation, leading to persistent negative emotions like anxiety and fear, wich can perpetuate the cycle of alcohol dependence and contribute to conditions like depression.
the path to alcohol use disorder frequently enough begins with stressful life events, followed by episodes of heavy drinking. These experiences combine with ongoing stressors, creating a vicious cycle where repeated alcohol use and withdrawal amplify negative feelings-a state known as hyperkatifeia. researchers have long known that neuroinflammation, specifically the activation of proinflammatory microglia, is a hallmark of AUD. But until now, it wasn’t clear if these microglia directly *caused* the negative emotions associated with heavy alcohol consumption.
Researchers at the University of North Carolina at Chapel Hill School of Medicine used mouse models to investigate the long-term emotional impact of alcohol. Mice were exposed to either four or ten days of binge alcohol consumption, and thier emotional states-specifically anxiety-like behavior and fear memory-were assessed during abstinence. In seperate groups, microglia were genetically inhibited during alcohol exposure, and researchers then evaluated emotional states and neuronal death.
The team discovered that longer alcohol exposure (ten days, in this model) – but not shorter exposure (four days) – resulted in brain damage and negative emotional states. This was directly linked to the activation of microglia, leading to sustained neuroinflammation
