Cited by 246Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchStress Responses and Cortisol

Increased phasic dopamine signaling in the mesolimbic pathway during social defeat in rats

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Anstrom, K.K., Miczek, K.A., Budygin, E.A.·2009·Neuroscience

Abstract

While reward-dependent facilitation of phasic dopamine signaling is well documented at both the cell bodies and terminals, little is known regarding fast dopamine transmission under aversive conditions. Exposure to aggressive confrontation is extremely aversive and stressful for many species including rats. The present study used fast-scan cyclic voltammetry and multiunit recording to determine if aggressive encounters and subsequent social defeat affect burst firing of ventral tegmental area (VTA) dopamine neurons and accumbal dopamine transients in defeated rats. Significant increases in the frequency of transient dopamine release were observed during interactions with an aggressive rat but not with a familiar cage mate. In agreement with voltammetric results, significant increases in burst frequency were detected in the VTA dopamine firing patterns during an aggressive confrontation; however, the number of spikes per burst remained unchanged. We found that neurons with lower burst rates under home cage conditions did not switch from nonbursting to bursting types, while neurons with higher burst levels showed amplified increases in bursting. This study demonstrates for the first time that aggressive confrontations in defeated rats are associated with increases in phasic dopamine transmission in the mesolimbic pathway.

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Crossref · 10.1016/j.neuroscience.2009.03.023

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Authors
Anstrom, K. K., Miczek, K. A., & Budygin, E. A.
Affiliations
  • Wake Forest University Health Sciences (US)
  • Tufts University (US)
Corresponding author
Budygin, E.A.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2009-06
Volume
161
Issue
1
Pages
3-12
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2078550466
Cited by
246
References
71
Citations by year
2026: 2 · 2025: 11 · 2024: 7 · 2023: 9 · 2022: 13 · 2021: 13 · 2020: 9 · 2019: 16 · 2018: 19 · 2017: 15 · 2016: 18 · 2015: 28 · 2014: 24 · 2013: 14 · 2012: 20
FWCI
6.65
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (R01AA013983, AA013983)
  • National Institute on Drug Abuse (K01DA021634, DA021634)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
social defeat, mesolimbic system, ventral tegmental area, accumbens, burst firing, dopamine release, stress, dopaminergic neurons
MeSH terms
Action Potentials, Aggression, Animals, Dominance-Subordination, Dopamine, Electrophysiology, Male, Synaptic Transmission, Nucleus Accumbens, Stress, Psychological, Signal Transduction, Rats, Sprague-Dawley, Ventral Tegmental Area, Rats

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