Alcoholism is a heterogeneous disorder, with different subtypes of behaviors both predisposing and exacerbating alcohol craving and drinking. While the alcohol research field has been successful in selectively breeding rodent lines that prefer and voluntarily consume large quantities of alcohol, there remains a critical need to understand the mechanisms by which different genetic histories and endophenotypic behavioral paths lead to a common phenotype of high drinking. This component will examine a largely unaddressed question: What behaviors distinguish high-alcohol preferring rodent lines from each other? Our rationale is that while alcohol-preferring (P) and high alcohol drinking (HAD) rats were selectively bred for the same behavioral phenotype (ethanol preference), they differ In behaviors associated with both motor and cognitive impulsivity that precede any ethanol exposure. A behavioral paradigm that separates ethanol-seeking and self-administration (Czachowski &Samson, 1999;2002) shows different patterns of ethanol-motivated responding in three rat populations. We will determine If the different seeking/drinking,patterns are related to differences in impulsivity. Our long-term goals are to understand the relationship between impulsivity and drinking behavior and to develop pharmacologic interventions that target the impulsivity phenotypes as a way to control drinking. The short-term goals of this proposal are to identify: 1) impulsive endophenotypes in two lines of rats considered as good models of human alcoholism, and 2) brain region/neurotransmitter systems Involved in both impulsivity and ethanol reinforcement. This will be addressed in 3 specific aims: SA1. Characterize impulsivity as measured by impaired behavioral inhibition (motor impulsivity) and impulsive choice (cognitive impulsivity) in P, HAD, and Long Evans rats that differentially express the motivation to seek and self-administer ethanol, using a natural reinforcer (sucrose). SA2. Determine the degree to which measures of Impulsivity are exhibited with reinforcers in general, or If they are specific to ethanol. SAS. Assess the effects of pharmacologic manipulation of frontal cortical function on impulsivity phenotypes and ethanol-seeking and drinking.

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This project will identify impulsive endophenotypes in two lines of rats considered as good models of human alcoholism, as well as the underlying brain region/neurotransmitter systems Involved in regulating both impulsivity and alcohol reinforcement The goal is to understand the relationship between impulsivity and binge-drinking behavior and to develop pharmacologic interventions that target the impulsivity phenotypes as a way to control alcohol drinking.

National Institute of Health (NIH)
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Comprehensive Center (P60)
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Special Emphasis Panel (ZAA1-GG)
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Indiana University-Purdue University at Indianapolis
United States
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McCane, Aqilah M; DeLory, Michael J; Timm, Maureen M et al. (2018) Differential COMT expression and behavioral effects of COMT inhibition in male and female Wistar and alcohol preferring rats. Alcohol 67:15-22
Vatsalya, Vatsalya; Stangl, Bethany L; Schmidt, Veronica Y et al. (2018) Characterization of hangover following intravenous alcohol exposure in social drinkers: methodological and clinical implications. Addict Biol 23:493-502
Sloan, M E; Klepp, T D; Gowin, J L et al. (2018) The OPRM1 A118G polymorphism: converging evidence against associations with alcohol sensitivity and consumption. Neuropsychopharmacology 43:1530-1538
Nicholson, Emily R; Dilley, Julian E; Froehlich, Janice C (2018) Co-Administration of Low-Dose Naltrexone and Bupropion Reduces Alcohol Drinking in Alcohol-Preferring (P) Rats. Alcohol Clin Exp Res 42:571-577
Weera, Marcus M; Agim, Zeynep S; Cannon, Jason R et al. (2018) Genetic correlations between nicotine reinforcement-related behaviors and propensity toward high or low alcohol preference in two replicate mouse lines. Genes Brain Behav :e12515
Oberlin, Brandon G; Dzemidzic, Mario; Eiler 2nd, William J A et al. (2018) Pairing neutral cues with alcohol intoxication: new findings in executive and attention networks. Psychopharmacology (Berl) 235:2725-2737
Chumin, Evgeny J; Goñi, Joaquín; Halcomb, Meredith E et al. (2018) Differences in White Matter Microstructure and Connectivity in Nontreatment-Seeking Individuals with Alcohol Use Disorder. Alcohol Clin Exp Res 42:889-896
Eiler 2nd, William J A; Dzemidzic, Mario; Soeurt, Christina M et al. (2018) Family history of alcoholism and the human brain response to oral sucrose. Neuroimage Clin 17:1036-1046
Weafer, Jessica; Ross, Thomas J; O'Connor, Sean et al. (2018) Striatal activity correlates with stimulant-like effects of alcohol in healthy volunteers. Neuropsychopharmacology 43:2532-2538
Weera, Marcus M; Fields, Molly A; Tapp, Danielle N et al. (2018) Effects of Nicotine on Alcohol Drinking in Female Mice Selectively Bred for High or Low Alcohol Preference. Alcohol Clin Exp Res 42:432-443

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