Cited by 242Neurotransmitter Receptor Influence on BehaviorRegulation of Appetite and ObesityParkinson's Disease Mechanisms and Treatments

Feeding behavior in dopamine-deficient mice

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Szczypka, Mark S., Rainey, Mark A., Kim, Douglas S., Alaynick, William A., Marck, Brett T., Matsumoto, Alvin M., Palmiter, Richard D.·1999·Proceedings of the National Academy of Sciences

Abstract

Mice that cannot make dopamine (DA), a condition caused by the selective inactivation of tyrosine hydroxylase in dopaminergic neurons, are born normal but gradually become hypoactive and hypophagic, and die at 3 weeks of age. We characterized the feeding and locomotor responses of these DA-deficient (DA−/−) mice to 3,4-dihyroxy- l -phenylalanine ( l -DOPA) to investigate the relationship between brain DA levels and these complex behaviors. Daily administration of l -DOPA to DA−/− mice stimulated locomotor activity that lasted 6 to 9 hr; during that time the mice consumed most of their daily food and water. The minimal dose of l -DOPA that was sufficient to elicit normal feeding behavior in the DA−/− mice also restored their striatal DA to 9.1% of that in the wild-type (WT) mice at 3 hr; then DA content declined to <1% of WT levels by 24 hr. This dose of l -DOPA induced locomotor activity that exceeded that of treated WT mice by 5- to 7-fold, suggesting that DA−/− mice are supersensitive to DA. Unexpectedly, DA−/− mice manifested a second wave of activity 24 to 48 hr after l -DOPA treatment that was equivalent in magnitude to that of WT mice and independent of DA receptor activation. The DA−/− mice approached, sniffed, and chewed food during this second period of activity, but they ate <10% of that required for sustenance. Therefore, DA−/− mice can execute behaviors necessary to seek and ingest food, but they do not eat enough to survive.

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Crossref · 10.1073/pnas.96.21.12138

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Authors
Szczypka, M. S., Rainey, M. A., Kim, D. S., Alaynick, W. A., Marck, B. T., Matsumoto, A. M., & Palmiter, R. D.
Affiliations
Howard Hughes Medical Institute (US)
Corresponding author
Palmiter, Richard D.
Venue
Proceedings of the National Academy of Sciences
Published
1999-10-12
Volume
96
Issue
21
Pages
12138-12143
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2041114226
Cited by
242
References
37
Citations by year
2026: 5 · 2025: 5 · 2024: 10 · 2023: 4 · 2022: 6 · 2021: 8 · 2020: 7 · 2019: 7 · 2018: 10 · 2017: 10 · 2016: 10 · 2015: 9 · 2014: 8 · 2013: 7 · 2012: 11
FWCI
3.38
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • University of Washington
  • National Institutes of Health
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD009172, F32HD008121, HD-08121)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
dopamine deficiency, feeding behavior, L-DOPA, locomotor activity, hypophagia, striatal dopamine, food seeking, dopamine supersensitivity
MeSH terms
Animals, Behavior, Animal, Brain, Carbidopa, Dopamine, Dose-Response Relationship, Drug, Feeding Behavior, Levodopa, Mice, Inbred C57BL, Motor Activity, Time Factors, Dopamine Agents, Receptors, Dopamine D1, Receptors, Dopamine D2, Mice, Dopamine D2 Receptor Antagonists

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