Journal
PSYCHONEUROENDOCRINOLOGY
Volume 35, Issue 2, Pages 226-232Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.psyneuen.2009.06.007
Keywords
Chemokines; IL-8; Inflammation; Major depressive disorder; MCP-1; MIP-1 beta
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Objective: To examine the role of chemokines of two major chemokine families, CC and CXC, in major depressive disorder (MDD) in a population-based sample. Method: The serum levels of CC chemokines MCP-1 and MIP-1 beta, and CXC chemokine IL-8 were measured from 122 participants (MDD group, n = 61; controls, n = 61). Depression severity was assessed with the 29-item Hamilton Depression Rating Scale. Results: The MDD group had lower levels of MCP-1, MIP-1 beta and IL-8 than the healthy controls. The likelihood of major depressive disorder for participants with chemokine levels below the median (MCP-1: <26.26 pg/mL; MIP-1 beta: <42.57 pg/mL; IL-8: <2.86 pg/mL) was 3.6 (p = 0.002) for MIP-1 1 beta and 2.4 (p = 0.037) for IL-8 in regression models adjusted for age, gender, body mass index, smoking, and alcohol consumption. MCP-1 did not associate with the presence of MDD after adjustments for potential confounders. Further adjustments for somatic illnesses or medications did not affect these findings. Conclusion: Our findings suggest that depression-related alterations of inflammatory markers may be more complex than previously assumed, and that at least some of the chemokines may be down-regutated. (C) 2009 Elsevier Ltd. All rights reserved.
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