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Transcriptome sequencing study implicates immune-related genes differentially expressed in schizophrenia: new data

A R Sanders^1,2, E I Drigalenko³, J Duan^1,2

¹Department of Psychiatry and Behavioral Sciences, NorthShore University HealthSystem, Evanston, IL, USA.

Translational Psychiatry

|April 19, 2017

Summary

This summary is machine-generated.

This study identified 1058 differentially expressed genes in schizophrenia cases using RNA sequencing, with many linked to immune function. Findings were validated by a meta-analysis combining RNA sequencing and array data, reinforcing immune system involvement in schizophrenia.

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Area of Science:

Genetics
Neuroscience
Immunology

Background:

Schizophrenia is a complex psychiatric disorder with a significant genetic component.
Previous studies have suggested immune system dysregulation in schizophrenia.
Transcriptomic profiling offers insights into gene expression changes associated with the disorder.

Purpose of the Study:

To identify differentially expressed genes in schizophrenia using RNA sequencing.
To investigate the role of immune-related genes in schizophrenia.
To compare RNA sequencing findings with previous array-based studies and conduct a meta-analysis.

Main Methods:

RNA sequencing (RNAseq) on lymphoblastoid cell lines from 529 schizophrenia cases and 660 controls.
Statistical analysis to identify differentially expressed genes (DEGs).
Meta-analysis combining RNAseq and array-based transcriptomic data from independent cohorts.

Main Results:

1058 genes were found to be differentially expressed between schizophrenia cases and controls.
Differentially expressed genes were significantly enriched for immune system pathways, with 697 genes showing higher expression in cases.
A meta-analysis of RNAseq and array data identified 169 additional DEGs and confirmed immune gene enrichment.
Corroborative evidence was found for previously identified genes, with 18% showing consistent differential expression and direction of effect.

Conclusions:

RNA sequencing provides a powerful approach to identify novel gene expression differences in schizophrenia.
Immune system dysregulation is a key feature of schizophrenia, supported by transcriptomic evidence.
The study identified new candidate genes involved in neurodevelopment and neuronal function associated with schizophrenia.