Cited by 355Tryptophan and brain disordersTreatment of Major DepressionStress Responses and Cortisol

Plasma cytokine profiles in depressed patients who fail to respond to selective serotonin reuptake inhibitor therapy

O’Brien, Sinead M., Scully, Paul, Fitzgerald, Peter, Scott, Lucinda V., Dinan, Timothy G.·2007·Journal of Psychiatric Research

Abstract

Objective Approximately 30% of patients with depression fail to respond to a selective serotonin reuptake inhibitor (SSRI). Few studies have attempted to define these patients from a biological perspective. Studies suggest that overall patients with depression show increased production of proinflammatory cytokines. We examined pro- and anti-inflammatory cytokine levels in patients who were SSRI resistant.Methods Plasma concentrations of IL-6, IL-8, IL-10, TNF-alpha and sIL-6R were measured with enzyme linked immunosorbent assays (ELISA) in DSM-1V major depressives who were SSRI resistant, in formerly SSRI resistant patients currently euthymic and in healthy controls.Results Patients with SSRI-resistant depression had significantly higher production of the pro-inflammatory cytokines IL-6 (p=0.01) and TNF-alpha (p=0.004) compared to normal controls. Euthymic patients who were formerly SSRI resistant had proinflammatory cytokine levels which were similar to the healthy subject group. Anti-inflammatory cytokine levels did not differ across the 3 groups.Conclusion Suppression of proinflammatory cytokines does not occur in depressed patients who fail to respond to SSRIs and is necessary for clinical recovery.

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Crossref · 10.1016/j.jpsychires.2006.05.013

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Authors
O’Brien, S. M., Scully, P., Fitzgerald, P., Scott, L. V., & Dinan, T. G.
Affiliations
Cork University Hospital (IE)
Corresponding author
Dinan, Timothy G.
Venue
Journal of Psychiatric Research
Publisher
Elsevier BV
Published
2007-04
Volume
41
Issue
3-4
Pages
326-331
ISSN
0022-3956 (ISSN-L)
OpenAlex
W2007121025
Cited by
355
References
32
Citations by year
2026: 8 · 2025: 9 · 2024: 12 · 2023: 11 · 2022: 12 · 2021: 27 · 2020: 14 · 2019: 24 · 2018: 30 · 2017: 21 · 2016: 25 · 2015: 28 · 2014: 22 · 2013: 20 · 2012: 20
FWCI
3.88
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Psychiatric Research (publishedVersion)
  • PubMed (publishedVersion)
  • Lenus, The Irish Health Repository (Dr Steevens Hospital Library) (submittedVersion)
Funders
  • Wellcome Trust
  • Health Research Board
  • Science Foundation Ireland
Topics
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
treatment-resistant depression, selective serotonin reuptake inhibitors, inflammatory cytokines, anti-inflammatory cytokines, interleukin-6, TNF-α, IL-10, interleukin-8, soluble IL-6 receptor, plasma cytokines, major depressive disorder
MeSH terms
Adult, Analysis of Variance, Antidepressive Agents, Major Depressive Disorder, Drug Resistance, Enzyme-Linked Immunosorbent Assay, Female, Humans, Male, Middle Aged, Psychiatric Status Rating Scales, Cytokines, Selective Serotonin Reuptake Inhibitors

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