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Peripheral immune markers and antipsychotic non-response in psychosis

Enache, Daniela, Nikkheslat, Naghmeh, Fathalla, Dina, Morgan, Paul, Lewis, Shon, Drake, Richard, Deakin, Bill, Walters, James, Lawrie, Stephen, Egerton, Alice, MacCabe, James and Mondelli, Valeria 2021. Peripheral immune markers and antipsychotic non-response in psychosis. Schizophrenia Research 230 , pp. 1-8. 10.1016/j.schres.2020.12.020

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Abstract

Background Peripheral immune markers have previously been linked to a poor response to antipsychotic medication and more severe negative symptoms at the onset of psychosis. The present study investigated the association of blood cytokines and complement markers with the presence of antipsychotic non-response and symptom severity in patients with psychosis. Methods This cross-sectional study recruited 94 patients with schizophrenia and other psychoses, of whom 47 were defined as antipsychotic responders and 47 as antipsychotic non-responders. In all subjects we measured plasma levels of cytokines (IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-13, TNF-α, and IFN-γ), complement markers (C1-inhibitor, C3, C4, C3a, C3b, Bb, factor D, C5a, terminal complement complex) and high sensitivity C-reactive protein (hsCRP). Symptom severity was recorded using the Positive and Negative Syndrome scale for Schizophrenia (PANSS). Binary logistic regression tested each immune marker as predictor of response status while covarying for relevant socio-demographic variables. Correlation analyses tested the association between immune markers and the severity of symptoms. Results Interleukin (IL)-8 significantly predicted antipsychotic non-response (OR=24.70, 95% CI, 1.35–453.23, p = 0.03). Other immune markers were not associated with antipsychotic response. IL-6, IL-8, IL-10 and TNF-α significantly positively correlated with negative psychotic symptoms. Conclusions Higher levels of IL-8 are associated with a poor response to antipsychotic treatment. Increased cytokines levels are specifically associated with more severe negative symptoms in patients with schizophrenia and other psychoses.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Publisher: Elsevier
ISSN: 0920-9964
Date of First Compliant Deposit: 5 February 2021
Date of Acceptance: 30 December 2020
Last Modified: 19 Oct 2021 01:17
URI: https://orca.cardiff.ac.uk/id/eprint/138294

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