Cited by 63Stress Responses and CortisolNeurotransmitter Receptor Influence on BehaviorNeuropeptides and Animal Physiology

Chronic stress sensitizes frontal cortex dopamine release in response to a subsequent novel stressor: reversal by naloxone

Cuadra, Gabriel, Zurita, Alejandra, Lacerra, Carolina, Molina, Vı́ctor·1999·Brain Research Bulletin

Abstract

The present study examined the influence of an early chronic variable stress procedure with or without concurrent naloxone administration at different doses (1, 2 or 3 mg/kg, i.p.) on stress (restraint)-induced dopamine release in the frontal cortex in vivo. A higher increase in cortical dopamine release in response to a subsequent restraint event was observed in chronically stressed rats as compared with those without chronic stress exposure. Naloxone pretreatment normalized this sensitized response only at the higher dose (3 mg/kg, i.p.). The present results indicate that cortical dopamine response to a novel and uncontrollable stressor sensitizes after exposure to a chronic variable stress procedure and that an endogenous opiate mechanism, presumably activated during chronic stress, may be involved in the development of such a sensitization process.

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Crossref · 10.1016/s0361-9230(98)00179-8

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Authors
Cuadra, G., Zurita, A., Lacerra, C., & Molina, V.
Affiliations
Universidad Nacional de Córdoba (AR)
Venue
Brain Research Bulletin
Publisher
Elsevier BV
Published
1999-02
Volume
48
Issue
3
Pages
303-308
ISSN
0361-9230 (ISSN-L)
OpenAlex
W2049925866
Cited by
63
References
40
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2020: 2 · 2019: 4 · 2018: 4 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 1
FWCI
1.53
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Research Bulletin (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
chronic stress, variable stress, naloxone, dopamine release, frontal cortex, restraint stress, stress sensitization, endogenous opioids, opioid antagonism, uncontrollable stress, rats
MeSH terms
Animals, Chronic Disease, Dopamine, Frontal Lobe, Male, Naloxone, Narcotic Antagonists, Restraint, Physical, Stress, Physiological, Rats, Wistar, Microdialysis, Opioid Peptides, Rats

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