Date of Thesis
Susceptibility to alcohol use disorders (AUDs) arises from a complex interplay of genetics and environmental experiences. While the initial subjective response predicts susceptibility to AUD, genetic variation is responsible for about 50% of an individual's risk. This study used a single-exposure conditioned place preference paradigm (SE-CPP) to identify phenotypic and genetic correlates of the initial subjective rewarding effects of alcohol (EtOH) in diversity outbred (DO) mice. We assessed the relationship between SE-CPP and anxiety-like behaviors using a marble burying test and light-dark box test. Ninety-six male and female diversity outbred mice were tested in a Marble Burying test at 7-8 weeks, followed by the light-dark box at 9-10 weeks of age. Between 11-12 weeks, subjects were assessed for SE-CPP. Animals received 1.5 g/kg EtOH or equivolume saline on either Day 1 and Day 3 in two distinct contexts (counterbalanced) and were tested for a context preference on Day 5. Overall, SE-CPP was evident in both males and females. In females, there was a correlation between the percentage of time spent in the EtOH-paired context and the number of marbles buried four weeks prior. In males, there was a correlation between the distance traveled during EtOH conditioning and the percentage of time spent in the EtOH-paired context. Genotyping will be used to understand the possible link between the observed phenotypes and genetic variation. This research contributes to a better understanding of the influences of sex and genetic variation in AUD.
Diversity Outbred Mice, Single Exposure Conditioned Place Preference, EtOH, Marble Burying, Light-Dark Box
Master of Science
Dr. Judy Grisel
Dr. Jennie Stevenson
Dr. Erin Rhinehart
Jones, Holly, "Genetic Substrates of the Initial Subjective Rewarding Effects of Alcohol in Mice" (2023). Master’s Theses. 273.