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Individual differences in sugar consumption predict amphetamine-induced dopamine overflow in nucleus accumbens
1Section on Behavioral Neuropharmacology, National Institute of Mental Health, Bethesda, MD 20892-1380, USA.
European Journal of Pharmacology
|May 15, 1996
Summary
Rats that consume more sugar show a stronger dopamine release in the brain
Area of Science:
- Neuroscience
- Behavioral Science
- Pharmacology
Background:
- Individual differences in sugar consumption and amphetamine response exist in rats.
- The mesolimbic dopamine system may underlie these behavioral variations.
Purpose of the Study:
- To investigate the link between sugar intake and the brain's dopamine response to amphetamine.
- To determine if sugar consumption predicts dopaminergic activity.
Main Methods:
- Utilized in vivo microdialysis to measure dopamine levels.
- Assessed amphetamine-stimulated dopamine overflow in the nucleus accumbens.
- Compared dopamine response between rats categorized as LOW and HIGH sugar feeders.
Main Results:
- A significant positive correlation was found between sugar consumption and amphetamine-stimulated dopamine overflow.
- HIGH sugar-feeding rats displayed markedly higher dopamine overflow compared to LOW sugar-feeding rats.
Conclusions:
- Sugar intake in rats is a reliable predictor of their nucleus accumbens' dopamine response to amphetamine.
- Suggests a connection between reward-seeking behavior and neurochemical sensitivity.