Study Links Schizophrenia Risk Genes to Ciliary Dysfunction in Brain Cells
Researchers used CRISPR gene editing in mouse brains to study 12 schizophrenia risk genes and found that perturbing these genes consistently affected ciliary programs—structures that help brain cells sense signals. The study identified 3,031 differentially expressed genes that mirror transcriptional changes seen in postmortem schizophrenia brains, suggesting ciliary dysfunction may be a key mechanism. This finding could open new avenues for understanding how genetic risk factors contribute to schizophrenia and potentially inform future treatments.
Researchers conducted an in vivo CRISPR study in postnatal mouse neocortex to understand how common schizophrenia risk variants influence disease mechanisms. They perturbed 12 schizophrenia risk genes previously linked to validated risk variants and performed single-cell RNA sequencing, identifying 3,031 differentially expressed genes that recapitulate transcriptional alterations observed in postmortem schizophrenia brains. Through integrated analysis including clustering, factor analysis, and gene regulatory network inference, the team uncovered convergent gene programs with distinct biological functions and cell-type specificity. Notably, ciliary transcriptional programs—related to primary cilia, signaling organelles in neurons and glia—consistently emerged across multiple analytical frameworks. Perturbation of key contributors to these ciliary programs led to significant alterations in ciliary structure, suggesting that schizophrenia genetic risk factors may influence how brain cells sense and process extracellular signals through mechanisms independent of traditional synaptic transmission.
Limitations & open questions
The study is a preprint and has not yet undergone peer review. The generalizability of findings from mouse models to human schizophrenia pathology remains to be established. The functional significance of ciliary alterations for schizophrenia symptoms and whether targeting ciliary dysfunction could have therapeutic benefit are open questions.
What different sources said
- bioRxivCenter
Perturbation of genes linked to common schizophrenia risk variants identifies cilia programs
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