Dr. Hollis Karoly, Exploring the Effects of Oral Cannabidiol on Blood Alcohol Level and Intoxication: Results from a Human Laboratory Study

September 2022

Dr. Hollis Karoly is an Assistant Professor at Colorado State University, Fort Collins, Colorado specializing in Clinical Psychology and Neuroscience with a specialization in addictive disorders. Her research aims to characterize neural, molecular and behavioral mechanisms underlying the etiology of alcohol use disorders, in an effort to inform treatment development. More specifically, Dr. Karoly is interested in how functional impairments along the microbiota-gut-brain-axis (MGBA; which refers to bidirectional interactions between gut microbes, endocrine, autonomic, enteric, immune and central nervous systems) may promote alcohol use behavior and serve as potential treatment targets. In recent years, her work has increasingly emphasized the role of the endogenous cannabinoid system – which is distributed heavily throughout the brain and gut – in the context of alcohol use disorders. Thus, Dr. Karoly is conducting several studies measuring the impact of phytocannabinoids (primarily cannabidiol [CBD] and tetrahydrocannabinol [THC]) on behavioral phenotypes related to alcohol use disorder (alcohol consumption, craving, intoxication) and on biomarkers across the MGBA (brain structure and function, peripheral inflammation, intestinal permeability, gut microbial composition). To this end, Dr. Karoly combines behavioral measures, molecular biology methods, neuroimaging and high throughput 16S ribosomal RNA gene sequencing to explore the impact of alcohol and cannabis on the MGBA and behavior. Because this work involves acute administration of various cannabis products, Dr. Karoly’s research also makes use of a Mobile Drug Administration Laboratory which adheres to federal guidelines restricting cannabis administration in academic research.

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