Cited by 47Neurotransmitter Receptor Influence on BehaviorStress Responses and CortisolTryptophan and brain disorders

Behavioural sensitization to a dopamine agonist is associated with reversal of stress-induced anhedonia

Papp, Mariusz, Willner, Paul, Muscat, Richard·1993·Psychopharmacology

Abstract

Chronic exposure to very mild unpredictable stress (CMS) has previously been found to reduce the consumption of palatable sweet solutions and to impair place preference conditioning; evidence has been presented that these effects may reflect a dysfunction of the mesolimbic dopamine system. In the present study, rats were subjected to CMS for a total of 9 weeks. CMS reduced the consumption of a 1% sucrose solution. During weeks 6 and 7, animals received quinpirole (0-400 micrograms/kg) twice weekly. Both CMS-treated animals and controls showed sensitization to the locomotor stimulant effects of quinpirole. Subsequently, a sustained recovery of sucrose drinking was observed in quinpirole-treated stressed animals. During week 8, all animals received a single pair of place preference conditioning trials, in which quinpirole (200 micrograms/kg) was administered in a distinctive environment, and vehicle in a different environment. Non-stressed animals showed an increase in preference for the environment associated with quinpirole, as did stressed animals that had been sensitized to quinpirole, this effect was absent in untreated stressed animals. Finally, in week 9, acute administration of raclopride (150 micrograms/kg) was found to reverse the recovery of sucrose drinking in quinpirole-treated stressed animals, suggesting that these effects are mediated by an increase in dopamine function.

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Crossref · 10.1007/bf02246966

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  • Chronic and sequential exposure of rats or mice to a mild stress regimen causes decreases in responsiveness to rewards, including decreased consumption of and preference for sucrose solutions and decreased rewarding properties of pharmacological and natural rewards in the place preference paradigm.

    “In particular, Willner and colleagues originally reported that chronic and sequential exposure of rats or mice to a mild stress regimen caused decreases in responsiveness to rewards [190,191], commonly reported as a decrease in the consumption of and preference for sucrose solutions, and a decrease in the rewarding properties of pharmacological and natural rewards in the place preference behavior”

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Authors
Papp, M., Willner, P., & Muscat, R.
Venue
Psychopharmacology
Published
1993-01
Volume
110
Issue
1-2
Pages
159-164
ISSN
  • 0033-3158 (ISSN-L)
  • 1432-2072
OpenAlex
W2049626380
Cited by
47
References
29
Citations by year
2023: 1 · 2022: 1 · 2019: 1 · 2016: 1 · 2014: 1 · 2013: 3 · 2012: 2
FWCI
0.24
Type
journal article
Language
en
Open access
closed
Locations
  • Psychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
chronic mild stress, quinpirole, dopamine agonists, behavioral sensitization, sucrose intake, mesolimbic dopamine system, raclopride, locomotor stimulant effects
MeSH terms
Animals, Behavior, Animal, Conditioning, Operant, Drinking Behavior, Ergolines, Male, Motor Activity, Reward, Salicylamides, Stress, Psychological, Sucrose, Dopamine Agonists, Dopamine Antagonists, Quinpirole, Raclopride, Rats

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