Astrocyte modulation of extinction impairments in ethanol-dependent female mice

• Published in: Neuropharmacology Vol. 179; p. 108272
• Main Authors: Giacometti, Laura L., Chandran, Kelsey, Figueroa, Laura A., Barker, Jacqueline M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15-11-2020
• Subjects: Astrocytes; Chemogenetics; Ethanol dependence; Extinction; Female; Reward seeking; Female; Astrocytes; Extinction; Reward seeking; Chemogenetics; Ethanol dependence
• ISSN: 0028-3908; 1873-7064
• DOI: 10.1016/j.neuropharm.2020.108272

Rates of alcohol use disorders are increasing in women, and there is growing evidence that both the cognitive and biological consequences of alcohol dependence are distinct in women as compared to men. Despite this, the neurobehavioral outcomes of chronic alcohol exposure are poorly characterized in women and female animals. In this study, we find that ethanol dependence impaired extinction of reward seeking in a food conditioned place preference task in female mice. At the same time point, ethanol-dependent females exhibited astrocytic dysregulation as indicated by a brain region-specific reduction in glial fibrillary acidic protein (GFAP) expression. Using a chemogenetic strategy, we demonstrate that modulating astrocyte function via chemogenetic activation of Gq-signaling in nucleus accumbens astrocytes transiently rescued extinction in ethanol-dependent females without impacting basal reward seeking. These findings identify astrocyte function as a potential target for the restoration of behavioral flexibility following chronic alcohol exposure in females.
•Ethanol dependence impairs extinction of reward seeking in female mice.•Ethanol dependence reduces GFAP immunoreactivity in nucleus accumbens in females.•Chemogenetic modulation of astrocytic Gq signaling rescues extinction deficits.