Cognitive dysfunction in schizophrenia: association with peripheral blood inflammatory signatures

Area of Science:

• Neuroscience
• Immunology
• Psychiatry

Background:

• Schizophrenia (SCZ) involves complex interactions, including immune system pathways.
• Aberrant peripheral inflammatory factors may contribute to SCZ-related neurodegeneration and cognitive impairment.
• Previous research on inflammatory factors in SCZ has yielded heterogeneous results, necessitating further investigation.

Purpose of the Study:

• To identify differentially expressed inflammatory factors in the peripheral blood of SCZ patients on olanzapine treatment.
• To evaluate the diagnostic efficacy of these factors using statistical modeling.
• To explore correlations between inflammatory factors, symptom severity (PANSS), and cognitive function (MCCB).

Main Methods:

• Recruited 40 SCZ patients on olanzapine and 40 healthy controls.
• Measured inflammatory factor levels via flow cytometric immunoassay.
• Assessed symptom severity using the Positive and Negative Syndrome Scale (PANSS) and cognitive function using the MATRICS Consensus Cognitive Battery (MCCB).

Main Results:

• SCZ patients exhibited significantly elevated Eotaxin and MCP1 levels compared to controls.
• Eotaxin and MCP1 were identified as key predictors of SCZ using LASSO regression and Boruta algorithm.
• Elevated Eotaxin correlated negatively with all MCCB cognitive domains, while MCP1 correlated with processing speed and attention/vigilance.

Conclusions:

• Eotaxin and MCP1 show potential as peripheral biomarkers for SCZ.
• These factors may help elucidate the mechanisms underlying cognitive impairments in SCZ.
• The findings provide new insights into the immune-inflammatory aspects of schizophrenia.