Tuesday, August 24, 2010

Serum S100B: A Potential Biomarker for Suicidality in Adolescents?

Structure of the S100B protein. Based on PyMOL rendering of PDB 1b4c.

The abstract of a paper published online by PLoS One:
By Tatiana Falcone, Vincent Fazio, Catherine Lee, Barry Simon, Kathleen Franco, Nicola Marchi, and Damir Janigro*

Cleveland Clinic-Lerner College of Medicine, Cleveland, Ohio, United States of America


Studies have shown that patients suffering from depression or schizophrenia often have immunological alterations that can be detected in the blood. Others reported a possible link between inflammation, a microgliosis and the blood-brain barrier (BBB) in suicidal patients. Serum S100B is a marker of BBB function commonly used to study cerebrovascular wall function.


We measured levels of S100B in serum of 40 adolescents with acute psychosis, 24 adolescents with mood disorders and 20 healthy controls. Patients were diagnosed according to DSM-IV TR criteria. We evaluated suicidal ideation using the suicidality subscale of the Brief Psychiatric Rating Scale for Children (BPRS-C).


Serum S100B levels were significantly higher (p<0.05) and correlated to severity of suicidal ideation in patients with psychosis or mood disorders, independent of psychiatric diagnosis. Patients with a BPRS-C suicidality subscores of 1–4 (low suicidality) had mean serum S100B values +/− SEM of 0.152+/−0.020 ng/mL (n = 34) compared to those with BPRS-C suicidality subscores of 5–7 (high suicidality) with a mean of 0.354+/−0.044 ng/mL (n = 30). This difference was statistically significant (p<0.05).


Our data support the use of S100B as an adjunctive biomarker to assess suicidal risk in patients with mood disorders or schizophrenia.

Citation: Falcone T, Fazio V, Lee C, Simon B, Franco K, et al. (2010) Serum S100B: A Potential Biomarker for Suicidality in Adolescents? PLoS ONE 5(6): e11089. doi:10.1371/journal.pone.0011089

Copyright: © 2010 Falcone et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

*E-mail: janigrd@ccf.org

To download the entire paper, please click here (PDF).

Also see:

Serum Biomarker May Help Predict Suicidality in Adolescents

Identifying Suicide Risks in Adolescents

Image courtesy of Emw. This image is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.

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