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Identification of gene loci that overlap between schizophrenia and educational attainment
Le Hellard, S., Wang, Y., Witoelar, A., Zuber, V., Bettella, F., Hugdahl, K., Espeseth, T., Steen, V. M., Melle, I., Desikan, R., Schork, A. J., Thompson, W. K., Dale, A. M., Djurovic, S., Andreassen, O. A., & Schizophrenia Working Group of the Psychiatric Genomics Consortium (2017). Identification of gene loci that overlap between schizophrenia and educational attainment. Schizophrenia Bulletin, (3), sbw085. https://doi.org/10.1093/schbul/sbw085
There is evidence for genetic overlap between cognitive abilities and schizophrenia (SCZ), and genome-wide association studies (GWAS) demonstrate that both SCZ and general cognitive abilities have a strong polygenic component with many single-nucleotide polymorphisms (SNPs) each with a small effect. Here we investigated the shared genetic architecture between SCZ and educational attainment, which is regarded as a "proxy phenotype" for cognitive abilities, but may also reflect other traits. We applied a conditional false discovery rate (condFDR) method to GWAS of SCZ (n = 82 315), college completion ("College," n = 95 427), and years of education ("EduYears," n = 101 069). Variants associated with College or EduYears showed enrichment of association with SCZ, demonstrating polygenic overlap. This was confirmed by an increased replication rate in SCZ. By applying a condFDR threshold
