Effects of fluoxetine, tianeptine and olanzapine on unpredictable chronic mild stress-induced depression-like behavior in mice
Abstract
Aims Tianeptine is an atypical antidepressant drug that has a different mechanism of action than other antidepressants. Olanzapine is an atypical antipsychotic drug used for the treatment of schizophrenia. The present study was undertaken to investigate effects of chronic administration of tianeptine or olanzapine on unpredictable chronic mild stress (UCMS)-induced depression-like behavior in mice compared to a widely used SSRI antidepressant, fluoxetine. Main methods Male inbred BALB/c mice were subjected to different kinds of stressors several times a day for 7weeks and were treated intraperitoneally with tianeptine (5mg/kg), olanzapine (2.5mg/kg), fluoxetine (15mg/kg) or vehicle for 5weeks (n=7-8 per group). Key findings All the drugs tested prevented stress-induced deficit in coat state during UCMS procedure, in grooming behavior in the splash test, decreased the attack frequency in the resident intruder test and decreased the immobility time in the tail suspension test. In the open field test olanzapine had anxiolytic-like effects in both stressed and non-stressed mice. Tianeptine, olanzapine and fluoxetine decreased the enhanced levels of plasma ACTH and IL-6. Chronic treatment with tianeptine resulted in a significant increase in both total number and density of BrdU-labeled cells in stressed animals, while fluoxetine and olanzapine had a partial effect. Significance The results of this study support the hypothesis that tianeptine can be as effective as fluoxetine for the treatment of depression in spite of the differences in the mechanism of action of these drugs. Moreover, olanzapine could be used effectively in psychotic patients with depression.
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The literature describing the effects of standard antidepressants on systemic inflammation is highly mixed.
“Indeed, the literature describing the effects of standard antidepressants on systemic inflammation is highly mixed.”
From Individual differences in the peripheral immune system promote resilience versus susceptibility to social stress (2014) · cites this paper as [39]
Some studies have demonstrated that antidepressants decrease inflammatory cytokines, others report either no effect or even increased levels.
“Although some studies have demonstrated that antidepressants decrease inflammatory cytokines (38, 39), others report either no effect (31, 40, 41) or even increased levels (42, 43).”
From Individual differences in the peripheral immune system promote resilience versus susceptibility to social stress (2014) · cites this paper as [39]
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- Authors
- Mutlu, O., Gumuslu, E., Ulak, G., Celikyurt, I. K., Kokturk, S., Kır, H. M., Akar, F., & Erden, F.
- Affiliations
- Kocaeli Üniversitesi (TR)
- Venue
- Life Sciences
- Publisher
- Elsevier BV
- Published
- 2012-12
- Volume
- 91
- Issue
- 25-26
- Pages
- 1252-1262
- ISSN
- 0024-3205 (ISSN-L)
- OpenAlex
- W2013586266
- Cited by
- 97
- References
- 10
- Citations by year
- 2026: 2 · 2025: 9 · 2024: 9 · 2023: 8 · 2022: 3 · 2021: 7 · 2020: 11 · 2019: 10 · 2018: 8 · 2017: 3 · 2016: 7 · 2015: 5 · 2014: 11 · 2013: 4
- FWCI
- 4.70
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Life Sciences (publishedVersion)
- PubMed (publishedVersion)
- Kocaeli Üniversitesi - AVESİS (submittedVersion)
- Topics
- Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
- Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
- Keywords
- tianeptine, olanzapine, fluoxetine, chronic unpredictable mild stress, depression-like behavior, antidepressant efficacy, anxiolytic effects, ACTH, interleukin-6, neurogenesis, resident-intruder aggression
- MeSH terms
- Olanzapine, Adrenocorticotropic Hormone, Animals, Antidepressive Agents, Behavior, Animal, Benzodiazepines, Depression, Disease Models, Animal, Fluoxetine, Injections, Intraperitoneal, Male, Mice, Inbred BALB C, Stress, Psychological, Thiazepines, Interleukin-6, Mice
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