الرئيسية / الفعاليات العلمية / ابحاث / Serum Interleukin Levels and Insulin Resistance in Major Depressive Disorder

Serum Interleukin Levels and Insulin Resistance in Major Depressive Disorder

Hussein Kadhem Al-Hakeim1, Sadiq Neama Al-Kufi2, Arafat Hussein Al-Dujaili3 and Michael Maes4,5*
1Professor in Medical Biochemistry, Department of Chemistry, College of Science, University of Kufa, Iraq;
2Department of Chemistry, College of Science, University of Kufa, Iraq; 3Senior of Psychiatric Medicine, College of
Medicine, University of Kufa, Iraq;
4Department of Psychiatry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand; 5Department of Psychiatry, Medical University of Plovdiv, Plovdiv, Bulgaria. School of Medicine, IMPACT Strategic Research Centre, Deakin University, PO Box 281, Geelong, VIC, 3220, Australia
Abstract:
Background & Objective: Major depressive disorder (MDD) has been associated with inflammatory processes, including increased cytokine levels, even in individuals who are otherwise
physically healthy, while some MDD patients may show insulin resistance (IR).
Method: However, correlations between cytokines and IR parameters have not been studied extensively in MDD. In the present study, we measured IL-1β, IL-4, IFN-γ, TGF-β1, insulin and glucose in
63 MDD patients and 27 healthy controls. The associations between cytokine levels and IR were examined.
Results: The results revealed a significant increase (p<0.05) in serum levels of IL-1β, IL-4, IFN-γ,
TGF-β1, insulin, insulin/glucose ratio, and insulin resistance (HOMA2IR) in MDD patients as compared with controls. There was a significant correlation between HOMA2IR with both IFN-γ
(ρ=0.289, p<0.05) and TGF-β1 (ρ=0.364, p<0.05).
Conclusion: The present study further confirms that MDD is accompanied by activation of the immune
system with significant elevations in the levels of four cytokines. These results indicate stimulation of the
immune system and increased IR and modulation of IR by increased cytokine levels in MDD. These
findings show that immune activation and associated IR are a new drug target in depression.

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