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Anterior insular cortex inputs to the dorsolateral striatum govern the maintenance of binge alcohol drinking

Haggerty, D. L.; Munoz, B.; Pennington, T.; Viana Di Prisco, G.; Grecco, G. G.; Atwood, B.

2022-06-14 neuroscience
10.1101/2022.01.27.478049 bioRxiv
Show abstract

How does binge drinking alcohol change synaptic function, and do these changes maintain binge consumption? The anterior insular cortex (AIC) and dorsolateral striatum (DLS) are brain regions implicated in alcohol use disorder. In mice, we found that binge drinking alcohol produced glutamatergic synaptic adaptations selective to AIC inputs within the DLS. Photoexciting AIC[->]DLS circuitry during binge drinking decreased alcohol, but not water consumption and altered alcohol drinking mechanics. Further, drinking mechanics alone from drinking session data predicted alcohol-related circuit changes. AIC[->]DLS manipulation did not alter operant, valence, or anxiety-related behaviors. These findings suggest that alcohol-mediated changes at AIC inputs govern behavioral sequences that maintain binge drinking and may serve as a circuit-based biomarker for the development of alcohol use disorder.

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