QKI6B mRNA levels are upregulated in schizophrenia and predict GFAP expression

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Schizophrenia is a complex psychiatric disorder with a strong genetic component.
• Glial cell dysfunction is increasingly recognized as a significant factor in schizophrenia.
• The quaking gene (QKI) and its isoforms, particularly QKI6B, play roles in glial cells.

Purpose of the Study:

• To investigate the expression levels of QKI6B and glial fibrillary acidic protein (GFAP) in post-mortem brain samples from individuals with schizophrenia.
• To determine if QKI6B expression can predict the expression of GFAP and oligodendrocyte-related genes.

Main Methods:

• Quantitative analysis of QKI6B and GFAP gene expression using real-time PCR in 55 schizophrenic and 55 control brain samples.
• Statistical analysis using Analysis of Covariance (ANCOVA) and multiple linear regression.

Main Results:

• Both QKI6B and GFAP were significantly upregulated in the prefrontal cortex of schizophrenic individuals compared to controls.
• QKI6B expression was found to significantly predict GFAP expression.
• QKI6B did not predict the expression of oligodendrocyte-related genes.

Conclusions:

• The findings suggest a specific role for QKI6B in regulating GFAP expression in the context of schizophrenia.
• Glial perturbations, particularly involving astrocytes, are implicated in the pathophysiology of schizophrenia.
• This research contributes to understanding the molecular mechanisms underlying glial cell involvement in schizophrenia.