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Related Experiment Video

Updated: Jun 12, 2026

Developing a Rat Model for Bipolar Disorder

Developing a Rat Model for Bipolar Disorder

Published on: May 2, 2025

Cytokine levels in euthymic bipolar patients.

Sinan Guloksuz¹, Esin Aktas Cetin, Turan Cetin

¹Rasit Tahsin Mood Disorders Outpatient Unit, Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, Istanbul, Turkey. sguloksuz@yahoo.com

Journal of Affective Disorders

|June 12, 2010

Summary

Cytokine levels in euthymic bipolar patients not on medication mirror those of healthy individuals. Lithium treatment, however, appears to elevate certain cytokine levels, suggesting a potential confounding factor in bipolar disorder research.

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Bead Based Multiplex Assay for Analysis of Tear Cytokine Profiles

Bead Based Multiplex Assay for Analysis of Tear Cytokine Profiles

Published on: October 13, 2017

Area of Science:

Neuroscience
Immunology
Psychiatry

Background:

Bipolar disorder pathophysiology remains unclear, with limited and conflicting data on cytokine involvement.
Previous research suggests manic and depressive episodes may represent pro-inflammatory states.
Most studies overlook enduring cytokine differences in euthymic bipolar patients, independent of medication.

Purpose of the Study:

To investigate enduring differences in serum cytokine levels between medication-free euthymic bipolar patients and healthy controls.
To assess the influence of lithium monotherapy on cytokine profiles in euthymic bipolar patients.
To clarify the role of cytokines in bipolar disorder immunopathology.

Main Methods:

Serum cytokine levels (IFN-γ, TNF-α, IL-2, IL-4, IL-5, IL-10) were measured using flow cytometry.
Three groups were studied: medication-free euthymic bipolar patients (n=16), euthymic bipolar patients on lithium (n=15), and healthy controls (n=16).
Groups were matched for age, gender, and ethnicity.

Main Results:

No significant differences in cytokine levels were observed between medication-free euthymic bipolar patients and healthy controls.
Euthymic bipolar patients on lithium monotherapy exhibited higher levels of TNF-α and IL-4 compared to both medication-free patients and controls.
These findings suggest cytokine levels normalize in euthymia for medication-free patients.

Conclusions:

Cytokine production in medication-free euthymic bipolar patients is comparable to healthy individuals.
The pro-inflammatory state associated with bipolar disorder appears to resolve during euthymia.
Lithium treatment influences cytokine profiles, potentially confounding studies on bipolar disorder immunopathology.