“We believe we’ve identified a mechanism that makes certain people predisposed to developing addictions, and it’s possible that the same mechanism underlies many – perhaps most – compulsive behaviors” explains Eric Dumont, an associate professor in the Department of Biomedical and Molecular Sciences.
The mechanism occurs in the reward pathway of the brain. In this pathway, the brain maintains a delicate balance between pleasure and aversion, ensuring that moment-to-moment desires and dislikes remain in sync with the biological needs of the body.
Dr. Dumont and his team found unusual activity in this pathway when modeling drug addiction in rodents, which exhibit a genetic predisposition to addiction comparable to humans. They believe that the pathway’s balance is prone to becoming unbalanced in a certain parts of the population. The signal to stop an activity reverses to a green light.
The team hopes that by identifying this mechanism, and possibly others like it, they will allow researchers to better understand and monitor a range of compulsive behaviors. Accordingly, Dr. Dumont’s team collaborates with Dr. Cella Olmstead, associate professor of Psychology at Queen’s, who recently developed an animal model of compulsive sucrose intake.