Association of SNPs in EGR3 and ARC with Schizophrenia Supports a Biological Pathway for Schizophrenia Risk

• Published in: PloS one Vol. 10; no. 10; p. e0135076
• Main Authors: Huentelman, Matthew J., Muppana, Leela, Corneveaux, Jason J., Dinu, Valentin, Pruzin, Jeremy J., Reiman, Rebecca, Borish, Cassie N., De Both, Matt, Ahmed, Amber, Todorov, Alexandre, Cloninger, C. Robert, Zhang, Rui, Ma, Jie, Gallitano, Amelia L.
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 16.10.2015; Public Library of Science (PLoS)
• Subjects: Age; Asian Continental Ancestry Group; Biological activity; Biotechnology industries; Bipolar disorder; Care and treatment; China - ethnology; Cytoskeletal Proteins - genetics; Deoxyribonucleic acid; Diagnosis; DNA; Early Growth Response Protein 3 - genetics; Egr-3 protein; Female; Gene expression; Gene sequencing; Genes; Genetic testing; Genetics; Genomes; Genomics; Genotyping Techniques; High-Throughput Nucleotide Sequencing; Hospitals; Humans; Hypotheses; Male; Management; Medicine; Mental disorders; Nerve Tissue Proteins - genetics; Plasticity; Polymorphism, Single Nucleotide; Population; Proteins; Psychiatry; Risk Factors; Schizophrenia; Schizophrenia - ethnology; Schizophrenia - genetics; Single nucleotide polymorphisms; Single-nucleotide polymorphism; Studies; Synaptic plasticity; Transcription factors; China; United States; United States > US; Arizona; Missouri
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0135076

We have previously hypothesized a biological pathway of activity-dependent synaptic plasticity proteins that addresses the dual genetic and environmental contributions to schizophrenia. Accordingly, variations in the immediate early gene EGR3, and its target ARC, should influence schizophrenia susceptibility. We used a pooled Next-Generation Sequencing approach to identify variants across these genes in U.S. populations of European (EU) and African (AA) descent. Three EGR3 and one ARC SNP were selected and genotyped for validation, and three SNPs were tested for association in a replication cohort. In the EU group of 386 schizophrenia cases and 150 controls EGR3 SNP rs1877670 and ARC SNP rs35900184 showed significant associations (p = 0.0078 and p = 0.0275, respectively). In the AA group of 185 cases and 50 controls, only the ARC SNP revealed significant association (p = 0.0448). The ARC SNP did not show association in the Han Chinese (CH) population. However, combining the EU, AA, and CH groups revealed a highly significant association of ARC SNP rs35900184 (p = 2.353 x 10(-7); OR [95% CI] = 1.54 [1.310-1.820]). These findings support previously reported associations between EGR3 and schizophrenia. Moreover, this is the first report associating an ARC SNP with schizophrenia and supports recent large-scale GWAS findings implicating the ARC complex in schizophrenia risk. These results support the need for further investigation of the proposed pathway of environmentally responsive, synaptic plasticity-related, schizophrenia genes.