Cited by 30Treatment of Major DepressionNeurotransmitter Receptor Influence on BehaviorElectroconvulsive Therapy Studies

Effects of chronic antidepressant drug administration and electroconvulsive shock on activity of dopaminergic neurons in the ventral tegmentum

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West, Charles H. K., Weiss, Jay M.·2011·The International Journal of Neuropsychopharmacology

Abstract

Increasing attention is now focused on reduced dopaminergic neurotransmission in the forebrain as participating in depression. The present paper assessed whether effective antidepressant (AD) treatments might counteract, or compensate for, such a change by altering the neuronal activity of dopaminergic neurons in the ventral tegmental area (VTA-DA neurons), the cell bodies of the mesocorticolimbic dopaminergic system. Eight AD drugs or vehicle were administered to rats for 14 d via subcutaneously implanted minipumps, at which time single-unit electrophysiological activity of VTA-DA neurons was recorded under anaesthesia. Further, animals received a series of five electroconvulsive shocks (ECS) or control procedures, after which VTA-DA activity was measured either 3 d or 5 d after the last ECS. Results showed that the chronic administration of all AD drugs tested except for the monoamine oxidase inhibitor increased the spontaneous firing rate of VTA-DA neurons, while effects on 'burst' firing activity were found to be considerably less notable or consistent. ECS increased both spontaneous firing rate and burst firing of VTA-DA neurons. It is suggested that the effects observed are consistent with reports of increased dopamine release in regions to which VTA neurons project after effective AD treatment. However, it is further suggested that changes in VTA-DA neuronal activity in response to AD treatment should be most appropriately assessed under conditions associated with depression, such as stressful conditions.

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Authors
West, C. H. K., & Weiss, J. M.
Affiliations
Emory University (US)
Venue
The International Journal of Neuropsychopharmacology
Published
2010-05-19
Volume
14
Issue
02
Pages
201-210
ISSN
  • 1461-1457 (ISSN-L)
  • 1469-5111
OpenAlex
W2131711336
Cited by
30
References
99
Citations by year
2024: 1 · 2021: 4 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 3 · 2015: 2 · 2013: 3 · 2012: 3
FWCI
2.58
Type
journal article
Language
en
Open access
Locations
  • The International Journal of Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (R01MH065737, R01MH079794, MH65737, MH79794)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Psychiatry and Mental health › Electroconvulsive Therapy Studies
Keywords
antidepressants, electroconvulsive shock, ventral tegmental area, dopaminergic neurons, spontaneous firing rate, burst firing, mesocorticolimbic dopamine system, depression, dopamine release, monoamine oxidase inhibitors, chronic drug administration
MeSH terms
Animals, Antidepressive Agents, Dopamine, Electroshock, Male, Synaptic Transmission, Neurons, Time Factors, Infusion Pumps, Implantable, Rats, Sprague-Dawley, Ventral Tegmental Area, Rats, Electrophysiological Phenomena

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