The association between immune markers and recent suicide attempts in patients with serious mental illness: A pilot study

Faith Dickerson, Maria Adamos, Emily Katsafanas, Sunil Khushalani, Andrea Origoni, Christina Savage, Lucy Schweinfurth, Cassie Stallings, Kevin Sweeney, Armin Alaedini, Melanie Uhde, Emily Severance, Holly C. Wilcox, Robert Yolken

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Previous studies have identified elevations in markers of gastrointestinal inflammation in schizophrenia and mood disorders but studies have not measured the association between these markers and recent suicide attempts. We assessed 210 patients receiving treatment for schizophrenia, bipolar disorder, or major depression. We employed the Columbia Suicide Severity Rating Scale to identify recent and lifetime suicide attempts (actual, aborted, and interrupted). Psychiatric participants and a control group of 72 individuals without a psychiatric disorder had a blood sample drawn from which were measured specific markers of gastrointestinal inflammation and also C-Reactive protein (CRP). A total of 20 (10%) of psychiatric participants had a suicide attempt in the previous one month and 95 (45%) an attempt during their lifetime but not in the previous one month. The recent attempters had significantly elevated levels of antibodies to yeast mannan from Saccharomyces cerevisiae (ASCA), the food antigen gliadin, and bacterial lipopolysaccharide (LPS) compared with the non-psychiatric group when adjusting for demographic and clinical variables. These markers were not elevated in individuals with a past, but not recent, suicide attempt history. Our study indicates that there is evidence of gastrointestinal inflammation in some individuals who have had a recent suicide attempt.

Original languageEnglish (US)
Pages (from-to)8-12
Number of pages5
JournalPsychiatry research
StatePublished - Sep 1 2017


  • Attempted
  • Biomarkers
  • Gastrointestinal
  • Inflammation
  • Suicide

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry


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