Related Experiment Video
Updated: Jul 2, 2026
The Three-Chamber Choice Behavioral Task using Zebrafish as a Model System
Published on: April 14, 2021
Nicotine effects on learning in zebrafish: the role of dopaminergic systems
Donnie Eddins1, Ann Petro, Paul Williams
1Department of Psychiatry and Behavioral Sciences, Neurobehavioral Research Laboratory, Duke University Medical Center, P.O. Box #3412, Durham, NC 27710, USA.
Rationale:
Nicotine improves cognitive function in a number of animal models including rats, mice, monkeys, and recently, zebrafish. The zebrafish model allows higher throughput and ease in discovering mechanisms of cognitive improvement.
Materials And Methods:
To further characterize the neural bases of nicotine effects on learning in zebrafish, we determined changes in dopaminergic systems that accompany nicotine-enhanced learning.
Results:
Nicotine improved learning and increased brain levels of dihydroxyphenylacetic acid (DOPAC), the primary dopamine metabolite. There was a significant correlation between choice accuracy and DOPAC levels. The nicotinic antagonist mecamylamine blocked the nicotine-induced increase in DOPAC concentrations, in line with our previous finding that mecamylamine reversed nicotine-induced learning improvement.
Conclusions:
Dopamine systems are related to learning in zebrafish; nicotine exposure increases both learning rates and DOPAC levels; and nicotinic antagonist administration blocks nicotine-induced rises in DOPAC concentrations. Rapid cognitive assessment of drugs with zebrafish could serve as a useful screening tool for the development of new therapeutics for cognitive dysfunction.
