Association of NPAS3 exonic variation with schizophrenia

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• The neuronal PAS3 (NPAS3) gene was previously identified as a candidate gene for schizophrenia.
• A translocation disrupting NPAS3 was found in a mother and daughter with schizophrenia, and the gene is located in a region linked to schizophrenia and bipolar disorder.
• NPAS3 is a bHLH-PAS transcription factor involved in nervous system development and function.

Purpose of the Study:

• To investigate the association between NPAS3 gene variants and schizophrenia.
• To identify specific mutations or variations in NPAS3 that may contribute to schizophrenia susceptibility.

Main Methods:

• Sequencing of the 12 exons of the NPAS3 gene in individuals diagnosed with schizophrenia.
• Analysis of NPAS3 variants, focusing on exons 6 and 12, in an initial cohort of 12 patients and subsequently in 83 patients and 83 controls.

Main Results:

• Three common NPAS3 variants (rs12434716, rs10141940, rs10142034) showed a positive association with schizophrenia.
• The c.1654G>C variant (p.Ala552Pro) may directly affect NPAS3 protein function.
• These variants are located within putative exonic splicing enhancer (ESE) motifs, suggesting potential effects on NPAS3 transcript splicing.

Conclusions:

• The identified NPAS3 variants, including those potentially affecting protein function or splicing, support the role of NPAS3 in schizophrenia.
• Perturbations in NPAS3 pathways are implicated in impaired neurogenesis and psychosis.
• Further research into NPAS3's role in neurodevelopmental disorders is warranted.