4.7 Article

Serum Inflammatory Markers and Integrity of the Superior Longitudinal Fasciculus and the Inferior Longitudinal Fasciculus in Schizophrenia, from Prodromal Stages to Chronic Psychosis-A Cross-Sectional Study

Journal

JOURNAL OF CLINICAL MEDICINE
Volume 12, Issue 2, Pages -

Publisher

MDPI
DOI: 10.3390/jcm12020683

Keywords

schizophrenia; first episode psychosis; UHR; superior longitudinal fasciculus; inferior longitudinal fasciculus; diffusion tensor imaging; cytokines; inflammatory markers; inflammation

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Chronic subclinical inflammation is believed to play a role in schizophrenia. This study investigated the correlation between peripheral inflammatory markers (IM) levels and the integrity of brain regions in different stages of schizophrenia. The study did not find any correlations between IM levels and integrity of specific brain regions in schizophrenia spectrum disorders.
Chronic subclinical inflammation is believed to be an important factor in the pathogenesis of schizophrenia. Meta-analyses confirm the presence of increased levels of peripheral inflammatory markers (IM) in schizophrenia and its prodromal stages. Peripheral cytokines may affect the brain microstructure through chronic activation of microglia. Disruptions in the integrity of the superior longitudinal fasciculus (SLF) and inferior longitudinal fasciculus (ILF) are commonly seen in patients with schizophrenia spectrum disorders. We therefore attempted to verify in a cross-sectional study whether there is a correlation between levels of peripheral IM and the integrity of these brain regions in healthy controls, from prodromal states and first episode psychosis to long-term schizophrenia. The integrity of white matter was measured using diffusion tensor imaging. Despite a broad analysis of six IM (CRP, IL-6, IL-8, IL-10, TNF-alpha, and IFN-gamma), we did not find any correlations with the integrity of the SLF or ILF in any of the analyzed groups (after correction for multiple comparisons). In conclusion, our study does not support the existence of a link between disrupted levels of peripheral IM and reduced integrity of ILF and SLF in schizophrenia spectrum disorders. However, prospective studies are needed to verify this over a long period of time.

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