Interleukin-6 Is Elevated in the Cerebrospinal Fluid of Suicide Attempters and Related to Symptom Severity.

Lindqvist, D., Janelidze, S., Hagell, P., Erhardt, S., Samuelsson, M., Minthon, L., Hansson, O., Björkqvist, M., Träskman-Bendz, L., Brundin, L.
Journal   Biol Psychiatry.
Species  
Analytes Measured   IL-6 , IL-8
Matrix Tested   Plasma, Cerebrospinal fluid
Year   2009
Volume   66
Page Numbers   287-92
Application   Cytokines and Chemokines
Abstract
BACKGROUND: Depressive disorders are associated with immune system alterations that can be detected in the blood. Cytokine concentrations in cerebrospinal fluid (CSF) and their relationship to aspects of suicidality have previously not been investigated.

METHODS: We measured interleukin-1beta, interleukin-6 (IL-6), interleukin-8, and tumor necrosis factor-alpha (TNF-alpha) in CSF and plasma of suicide attempters (n = 63) and healthy control subjects (n = 47). Patients were classified according to diagnosis and violent or nonviolent suicide attempt. We evaluated suicidal ideation and depressive symptoms using the Suicide Assessment Scale and the Montgomery-Asberg Depression Rating Scale (MADRS). We also analyzed the relation between cytokines and monoamine metabolites 5-hydroxyindoleacetic acid (5-HIAA), homovanillic acid (HVA), and 3-methoxy-4-hydroxyphenylglycol (MHPG) in CSF, as well as the integrity of the blood-brain barrier as reflected by the CSF:serum albumin ratio.

RESULTS: IL-6 in CSF was significantly higher in suicide attempters than in healthy control subjects. Patients who performed violent suicide attempts displayed the highest IL-6. Furthermore, there was a significant positive correlation between MADRS scores and CSF IL-6 levels in all patients. IL-6 and TNF-alpha correlated significantly with 5-HIAA and HVA in CSF, but not with MHPG. Cytokine levels in plasma and CSF were not associated, and patients with increased blood-brain barrier permeability did not exhibit elevated cytokine levels.

CONCLUSIONS: We propose a role for CSF IL-6 in the symptomatology of suicidal behavior, possibly through mechanisms involving alterations of dopamine and serotonin metabolism.

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Singleplex
V-PLEX Plus Chemokine Panel 1 NHP Kit
Eotaxin-3, IL-8, IL-8 (HA), IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC | Non-human primate
Multiplex
V-PLEX Plus NHP Cytokine 24-Plex Kit
Eotaxin-3, GM-CSF, IFN-γ, IL-1β, IL-2, IL-5, IL-6, IL-7, IL-8, IL-8 (HA), IL-10, IL-12/IL-23p40, IL-15, IL-16, IL-17A, IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC, TNF-β, VEGF-A | Non-human primate
Multiplex
V-PLEX Plus NHP IL-6 Kit
IL-6 | Non-human primate
Singleplex
V-PLEX Plus NHP IL-8 Kit
IL-8 | Non-human primate
Singleplex
V-PLEX Plus Proinflammatory Panel 1 NHP Kit
IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10 | Non-human primate
Multiplex
V-PLEX Proinflammatory Panel 1 NHP Kit
IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10 | Non-human primate
Multiplex
Human IL-6 Antibody Bulk Product
IL-6
Human IL-8 Antibody Bulk Product
IL-8
Mouse IL-6 Antibody
IL-6
Rat IL-6 Antibody
IL-6
V-PLEX Chemokine Panel 1 Human Kit
Eotaxin, Eotaxin-3, IL-8, IL-8 (HA), IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC | Human
Multiplex
V-PLEX Human Cytokine 30-Plex Kit
Eotaxin, Eotaxin-3, GM-CSF, IFN-γ, IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-8 (HA), IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC, TNF-α, TNF-β, VEGF-A | Human
Multiplex
V-PLEX Human IL-6 Kit
IL-6 | Human
Singleplex
V-PLEX Human IL-8 Kit
IL-8 | Human
Singleplex
V-PLEX Human Proinflammatory Panel I (4-Plex)
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
V-PLEX Human Proinflammatory Panel II (4-Plex)
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
V-PLEX Mouse IL-6 Kit
IL-6 | Mouse
Singleplex
V-PLEX Plus Chemokine Panel 1 Human Kit
Eotaxin, Eotaxin-3, IL-8, IL-8 (HA), IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC | Human
Multiplex
V-PLEX Plus Human Cytokine 30-Plex Kit
Eotaxin, Eotaxin-3, GM-CSF, IFN-γ, IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-7, IL-8, IL-8 (HA), IL-10, IL-12/IL-23p40, IL-12p70, IL-13, IL-15, IL-16, IL-17A, IP-10, MCP-1, MCP-4, MDC, MIP-1α, MIP-1β, TARC, TNF-α, TNF-β, VEGF-A | Human
Multiplex
V-PLEX Plus Human IL-6 Kit
IL-6 | Human
Singleplex
V-PLEX Plus Human IL-8 Kit
IL-8 | Human
Singleplex
V-PLEX Plus Human Proinflam. Panel I (4-Plex)
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
V-PLEX Plus Human Proinflam. Panel II (4-Plex)
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
V-PLEX Plus Mouse IL-6 Kit
IL-6 | Mouse
Singleplex
V-PLEX Plus Proinflammatory Panel 1 Human Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Multiplex
V-PLEX Plus Proinflammatory Panel1 Mouse Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Multiplex
V-PLEX Plus Rat IL-6 Kit
IL-6 | Rat
Singleplex
V-PLEX Proinflammatory Panel 1 Human Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Multiplex
V-PLEX Proinflammatory Panel 1 Mouse Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Multiplex
V-PLEX Rat IL-6 Kit
IL-6 | Rat
Singleplex
Chemokine Panel 1 Human Control Pack
Eotaxin, Eotaxin-3, IL-8, IP-10, MCP-1, MCP-4, MDC, TARC | Human
Proinflammatory Panel 1 Human Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Proinflammatory Panel 1 Mouse Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p70, KC/GRO, TNF-α | Mouse
Proinflammatory Panel 1 Rat Control Pack
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-13, KC/GRO, TNF-α | Rat
Human ProInflammatory-4 II Tissue Culture Kit
IL-1β, IL-6, IL-8, TNF-α | Human
Multiplex
Human IL-6 Tissue Culture Kit
IL-6 | Human
Singleplex
Human ProInflammatory 7-Plex Tissue Culture Kit
IFN-γ, IL-1β, IL-6, IL-8, IL-10, IL-12p70, TNF-α | Human
Multiplex
Human ProInflammatory 9-Plex Tissue Culture Kit
GM-CSF, IFN-γ, IL-1β, IL-2, IL-6, IL-8, IL-10, IL-12p70, TNF-α | Human
Multiplex
Human IL-8 Tissue Culture Kit
IL-8 | Human
Singleplex
Human ProInflammatory-4 I Tissue Culture Kit
IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
Human TH1/TH2 10-Plex Tissue Culture Kit
IFN-γ, IL-1β, IL-2, IL-4, IL-5, IL-8, IL-10, IL-12p70, IL-13, TNF-α | Human
Multiplex
Canine ProInflammatory Panel 3 Ultra-Sensitive Kit
IL-2, IL-6, IL-8, TNF-α | Canine
Multiplex
MA6000 Rat IL-6 384 Tissue Culture Kit
IL-6 | Rat
Singleplex
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