NTM and NR3C2 Polymorphisms Influencing Intelligence: Family-Based Association Studies
Document Type
Article
Publication Date
1-15-2011
Description
Family, twin, and adoption studies have indicated that human intelligence quotient (IQ) has significant genetic components. We performed a low-density genome-wide association analysis with a family-based association test to identify genetic variants influencing IQ, as measured by Wechsler Adult Intelligence Scale full-score IQ (FSIQ). We examined 11,120 single-nucleotide polymorphisms (SNPs) from the Affymetrix GeneChips 10K mapping array genotyped in 292 nuclear families from Genetic Analysis Workshop 14, a subset from the Collaborative Study on the Genetics of Alcoholism (COGA). A replication analysis was performed using part of International Multi-Center ADHD Genetics Project (IMAGE) dataset. Twenty-two SNPs were identified as having suggestive associations with IQ (p<10-3) in the COGA sample and eleven of the SNPs were located within known genes. In particular, NTM at 11q25 (rs411280, p=0.000764) and NR3C2 at 4q31.1 (rs3846329, p=0.000675) were two novel genes which have not been associated with IQ in other studies. It has been reported that NTM might play a role in late-onset Alzheimer disease while NR3C2 may be associated with cognitive function and major depression. The associations of these two genes were well-replicated by single-marker and haplotype analyses in the IMAGE sample. In conclusion, our findings provide evidence that chromosome regions of 11q25 and 4q31.1 contain genes affecting IQ. This study will serve as a resource for replication in other populations.
Citation Information
Pan, Yue; Wang, KeSheng; and Aragam, Nagesh. 2011. NTM and NR3C2 Polymorphisms Influencing Intelligence: Family-Based Association Studies. Progress in Neuro-Psychopharmacology and Biological Psychiatry. Vol.35(1). 154-160. https://doi.org/10.1016/j.pnpbp.2010.10.016 PMID: 21036197 ISSN: 0278-5846