Evidence map›Paper›PMID 25541493›Full record

SynthesisBiological psychiatry2015

Meta-Analysis of Cytokines and Chemokines in Suicidality: Distinguishing Suicidal Versus Nonsuicidal Patients.

Carmen Black, Brian J Miller

Registry-linked trialAbstract readMeta-Analysis
PubMed Publisher
In one paragraph

Synthesis in Biological psychiatry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04159207 (A Longitudinal Study of Inflammatory Pathways in Depression), which is not on this map. Cited by 184 papers, 10 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
184citing papers in PubMed, 10 pooled it
7.0field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT04159207 completednot on this mapstarted 2019, after this paper: background citation

A Longitudinal Study of Inflammatory Pathways in Depression

TypeobservationalSponsorVan Andel Research InstituteRan2019 to 2023Enrolled130ConditionsMajor Depressive Disorder, Suicide, Attempted
3 · Its place in the literature

Who cites it

184 citing papers in PubMed, 10 syntheses or guidelines pooled it, 351 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
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  5. Pooled it
  6. Pooled it
  7. A Specific Inflammatory Profile Underlying Suicide Risk? Systematic Review of the Main Literature Findings.International journal of environmental research and public health · 2020
    Pooled it
  8. Pooled it
  9. Pooled it
  10. Pooled it
  11. Bimekizumab efficacy and safety in Chinese patients with psoriasis in the BE SHINING Phase 3 study.Journal of the European Academy of Dermatology and Venereology : JEADV · 2026
    Trial
  12. Effect of Ibuprofen on BrainAGE: A Randomized, Placebo-Controlled, Dose-Response Exploratory Study.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2018
    Trial
  13. Article
  14. Choroid plexus inflammation in bipolar disorder.Brain, behavior, and immunity · 2026
    Article
  15. Review
  16. Article
  17. Inflammation and treatment strategies for suicidal behavior.The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry · 2026
    Review
  18. Low 5HTJournal of neurochemistry · 2026
    Review
  19. Article
  20. Inflammatory Biomarkers in Acute Suicidal Behaviors.International journal of molecular sciences · 2026
    Review

124 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Carmen BlackMedical College of Georgia, Georgia Regents University, Augusta, Georgia.
Brian J MillerDepartment of Psychiatry and Health Behavior, Georgia Regents University, Augusta, Georgia.. Electronic address: brmiller@gru.edu.
Augusta University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMajor psychiatric disorders are associated with inflammation. Aberrant cytokine and chemokine levels have been associated with psychiatric disorders and suicidal behavior. We performed a meta-analysis of cytokine and chemokine levels in patients with versus without suicidality and patients with suicidality versus healthy controls.

methodsWe identified articles by searching MEDLINE, PsycINFO, and Thomson Reuters Web of Knowledge databases and the reference lists of identified studies.

resultsStudy inclusion criteria were met by 18 studies comprising 583 patients with suicidality, 315 patients without suicidality, and 845 healthy control subjects. Levels of interleukin (IL)-1β and IL-6 were significantly increased in blood and postmortem brain samples of patients with suicidality compared with both patients without suicidality and healthy control subjects (p < .05 for each). In vitro IL-2 production by peripheral blood mononuclear cells was significantly decreased in patients with suicidality compared with both patients without suicidality and healthy controls (p < .01 for each). Cerebrospinal fluid levels of IL-8 were significantly decreased in patients with suicidality versus control subjects (p < .05).

conclusionsWe found evidence for aberrant cytokine levels in blood, cerebrospinal fluid, and postmortem brain samples of patients with suicidality. Levels of IL-1β and IL-6 were most robustly associated with suicidality, and these cytokines may help distinguish suicidal from nonsuicidal patients. Rigorously designed longitudinal studies are needed to evaluate these associations further.

Indexed as

SuicideAdolescentAdultBrainChemokinesCytokinesFemaleHumansInflammationInterleukin-1betaInterleukin-8MaleMental DisordersMiddle AgedReceptors, Interleukin-6ChemokinesCXCL8 protein, humanCytokinesIL6R protein, humanInterleukin-1betaInterleukin-8Receptors, Interleukin-6ChemokinesCytokinesDepressionInflammationMeta-analysisSuicide

Identifiers

PMID25541493
OpenAlexW1968764187

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.