ArticlePhysiology & behavior2023
Prior experience with flavored alcohol increases preference for flavored alcohol but flavor does not influence binge-like drinking behavior in mice.
Article in Physiology & behavior, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors at 1 institution in 1 country.
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Abstract
backgroundBinge drinking can lead to various negative consequences and in non-experimental settings, alcohol usually contains flavoring, which may promote increased binge drinking. Preclinical models of binge-like drinking have been well established, however, the influence of flavor on alcohol preference and binge-like drinking has not been fully explored.
methodsMale and female C57BL/6 J mice were tested via two-bottle choice with alcohol flavored with different concentrations of unsweetened Cherry flavor Kool-Aid and water. Next, mice were tested for preference for flavored alcohol over plain alcohol. Consumption of flavored alcohol versus water was examined over 48 h. Binge-like drinking with flavored alcohol was validated via drinking in the dark (DID). A separate cohort of mice underwent chronic DID for 6 weeks with either flavored or plain alcohol. After chronic DID, mice were then tested for preference for flavored versus plain alcohol and then alcohol consumption despite adverse effects was examined using the quinine adulteration test.
resultsThe 0.1% Kool-Aid concentration was chosen to use for further testing based on intake. Mice preferred Kool-Aid flavored alcohol over plain alcohol after the concentration test, but mice with no prior exposure to plain or flavored alcohol preferred plain over flavored alcohol. Throughout all initial testing, female mice showed increased alcohol intake compared to male mice. Both male and female mice showed binge-like drinking of flavored alcohol, with females having higher intake and blood alcohol levels. Kool-Aid flavor did not increase alcohol intake during chronic binge-like drinking. Previous exposure to flavored alcohol during DID increased the preference for flavored alcohol over plain alcohol but did not influence alcohol consumption despite adverse effects.
conclusionThe present study indicates that prior experience with flavored alcohol increases preference and intake, suggesting an effect of learned safety from neophobia. However, flavor does not impact binge-like alcohol consumption or alcohol drinking despite negative consequences. Additionally, the current study shows that female mice will consume more flavored alcohol than males, similar to findings from other alcohol studies.
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