Acute Stress-induced Changes in Hippocampal/Prefrontal Circuits in Rats: Effects of Antidepressants
Abstract
Acute stress inhibits long-term potentiation (LTP) at synapses from the hippocampus to prefrontal cortex in the rat, a model of the dysfunction in the anterior cingulate/orbitofrontal cortices which has been observed in human depression. We demonstrate that the antidepressants tianeptine and, to a lesser extent, fluoxetine, are able to reverse the impairment in LTP, a measure of frontal synaptic plasticity, caused by stress on an elevated platform. LTP was induced by stimulation of hippocampal outflow. Beneficial effects on neuronal plasticity, defined as a reversal of the effects of stress in this paradigm, can be considered as a new animal model for the impact of stress on hippocampal/frontal circuits, a key target in psychiatric diseases.
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LTP in the PFC produced by stimulation of the ventral hippocampus is blocked by elevated platform stress.
“Similarly, Rocher et al. [402] demonstrated that LTP in the PFC produced by stimulation of the ventral hippocampus was blocked by elevated platform stress.”
From The Temporal Dynamics Model of Emotional Memory Processing: A Synthesis on the Neurobiological Basis of Stress-Induced Amnesia, Flashbulb and Traumatic Memories, and the Yerkes-Dodson Law (2007) · cites this paper as Rocher et al. [402]
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- Authors
- Rocher, C.
- Affiliations
- Université Paris-Sud (FR)
- Corresponding author
- Rocher, C.
- Venue
- Cerebral Cortex
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-02-01
- Volume
- 14
- Issue
- 2
- Pages
- 224-229
- ISSN
- 1047-3211 (ISSN-L)
- 1460-2199
- OpenAlex
- W2037434120
- Cited by
- 307
- References
- 6
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 4 · 2023: 4 · 2022: 7 · 2021: 13 · 2020: 14 · 2019: 6 · 2018: 10 · 2017: 12 · 2016: 15 · 2015: 23 · 2014: 16 · 2013: 20 · 2012: 19
- FWCI
- 10.10
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Cerebral Cortex (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Institut National de la Santé et de la Recherche Médicale
- Centre National de la Recherche Scientifique
- Servier
- Topics
- Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
- Keywords
- acute stress, hippocampus, prefrontal cortex, long-term potentiation, synaptic plasticity, antidepressants, tianeptine, fluoxetine, depression, elevated platforms, animal models of depression
- MeSH terms
- Acute Disease, Animals, Fluoxetine, Hippocampus, Injections, Intraperitoneal, Male, Neural Inhibition, Neural Pathways, Stress, Physiological, Thiazepines, Rats, Sprague-Dawley, Prefrontal Cortex, Long-Term Potentiation, Rats
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