Cited by 256Bipolar Disorder and TreatmentTryptophan and brain disordersTreatment of Major Depression

Cytokines in bipolar disorder: A systematic review and meta-analysis

Munkholm, Klaus, Vinberg, Maj, Vedel Kessing, Lars·2013·Journal of Affective Disorders

Abstract

Background Current research and hypothesis regarding the pathophysiology of bipolar disorder suggests the involvement of immune system dysfunction that is possibly related to disease activity. Our objective was to systematically review evidence of cytokine alterations in bipolar disorder according to affective state.Methods We conducted a systemtic review of studies measuring endogenous cytokine concentrations in patients with bipolar disorder and a meta-analysis, reporting results according to the PRISMA statement.Results Thirteen studies were included, comprising 556 bipolar disorder patients and 767 healthy controls, evaluating 15 different cytokines-, cytokine receptors- or cytokine antagonists. The levels of tumor necrosis factor-α (TNF-α), the soluble tumor necrosis factor receptor type 1 (sTNF-R1) and the soluble inlerleukin-2 receptor (sIL-2R) were elevated in manic patients compared with healthy control subjects (p<0.01 for each). Levels of sTNF-R1 and TNF-α were elevated in manic patients compared to euthymic patients (p=0.01 and p=0.04, respectively). sTNF-R1 levels were elevated in euthymic patients compared with healthy control subjects (p<0.01). There were no significant findings for other comparisons, including intra-individual alterations of cytokine levels.Limitations Stratification according to mood state resulted in small study numbers for some cytokines. Findings were limited by heterogeneity, small sample sizes and a lack of control for confounding factors in individual studies.Conclusions This meta-analysis found some support for immune dysregulation in bipolar disorder. Future research is warranted to elucidate the role of endogenous cytokine alterations in bipolar disorder. Clinical studies examining longitudinal changes within individuals are recommended.

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Crossref · 10.1016/j.jad.2012.06.010

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Authors
Munkholm, K., Vinberg, M., & Vedel Kessing, L.
Affiliations
University of Copenhagen (DK)
Corresponding author
Munkholm, Klaus
Venue
Journal of Affective Disorders
Publisher
Elsevier BV
Published
2013-01
Volume
144
Issue
1-2
Pages
16-27
ISSN
0165-0327 (ISSN-L)
OpenAlex
W2028131345
Cited by
256
References
112
Citations by year
2026: 9 · 2025: 7 · 2024: 13 · 2023: 12 · 2022: 17 · 2021: 25 · 2020: 24 · 2019: 20 · 2018: 17 · 2017: 22 · 2016: 21 · 2015: 31 · 2014: 26 · 2013: 10 · 2012: 2
FWCI
2.97
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Affective Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
Funders
  • Lundbeck Foundation, Denmark (R34-A3696)
  • Danish Council for Independent Research | Medical Sciences (09-073972)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
Keywords
bipolar disorder, cytokines, immune dysregulation, TNF-α, soluble interleukin-2 receptor, manic state, euthymic state, affective states, cytokine receptors, cytokine antagonists
MeSH terms
Adult, Affect, Bipolar Disorder, Female, Humans, Male, Middle Aged, Tumor Necrosis Factor-alpha, Receptors, Interleukin-2, Cytokines, Receptors, Cytokine, Controlled Clinical Trials as Topic, Receptors, Tumor Necrosis Factor, Type I

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