Cited by 551Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesRegulation of Appetite and Obesity

Hyperdopaminergic mutant mice have higher "wanting" but not "liking" for sweet rewards

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Peciña, Susana, Cagniard, Barbara, Berridge, Kent C., Aldridge, J. Wayne, Zhuang, Xiaoxi·2003·The Journal of Neuroscience

Abstract

What is the role of dopamine in natural rewards? A genetic mutant approach was taken to examine the consequences of elevated synaptic dopamine on (1) spontaneous food and water intake, (2) incentive motivation and learning to obtain a palatable sweet reward in a runway task, and (3) affective "liking" reactions elicited by the taste of sucrose. A dopamine transporter (DAT) knockdown mutation that preserves only 10% of normal DAT, and therefore causes mutant mice to have 70% elevated levels of synaptic dopamine, was used to identify dopamine effects on food intake and reward. We found that hyperdopaminergic DAT knockdown mutant mice have higher food and water intake. In a runway task, they demonstrated enhanced acquisition and greater incentive performance for a sweet reward. Hyperdopaminergic mutant mice leave the start box more quickly than wild-type mice, require fewer trials to learn, pause less often in the runway, resist distractions better, and proceed more directly to the goal. Those observations suggest that hyperdopaminergic mutant mice attribute greater incentive salience ("wanting") to a sweet reward in the runway test. But sucrose taste fails to elicit higher orofacial "liking" reactions from mutant mice in an affective taste reactivity test. These results indicate that chronically elevated extracellular dopamine facilitates "wanting" and learning of an incentive motivation task for a sweet reward, but elevated dopamine does not increase "liking" reactions to the hedonic impact of sweet tastes.

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Authors
Peciña, S., Cagniard, B., Berridge, K. C., Aldridge, J. W., & Zhuang, X.
Affiliations
University of Michigan (US)
Venue
The Journal of Neuroscience
Published
2003-10-15
Volume
23
Issue
28
Pages
9395-9402
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2151211427
Cited by
551
References
68
Citations by year
2026: 4 · 2025: 18 · 2024: 11 · 2023: 9 · 2022: 15 · 2021: 24 · 2020: 53 · 2019: 57 · 2018: 20 · 2017: 23 · 2016: 27 · 2015: 37 · 2014: 27 · 2013: 30 · 2012: 27
FWCI
5.66
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0091661)
  • National Alliance for Research on Schizophrenia and Depression
  • National Institutes of Health
  • National Institute of Mental Health (MH-63649, R01MH063649)
  • National Institute on Drug Abuse (DA015188, R01DA015188)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
dopamine, hyperdopaminergic state, synaptic dopamine, reward, incentive motivation, incentive salience, wanting, liking, sucrose taste, dietary intake, runway task, reward learning
MeSH terms
Animals, Appetitive Behavior, Behavior, Animal, Body Weight, Dopamine, Drinking, Eating, Exploratory Behavior, Facial Expression, Learning, Male, Membrane Glycoproteins, Mice, Neurologic Mutants, Mutation, Nerve Tissue Proteins, Reward, Stimulation, Chemical, Sucrose, Synapses, Taste, Membrane Transport Proteins, Extracellular Fluid, Dopamine Plasma Membrane Transport Proteins, Mice

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