TY - JOUR
T1 - Association study of nonsynonymous single nucleotide polymorphisms in schizophrenia
AU - Carrera, Noa
AU - Arrojo, Manuel
AU - Sanjuán, Julio
AU - Ramos-Ríos, Ramón
AU - Paz, Eduardo
AU - Suárez-Rama, Jose J
AU - Páramo, Mario
AU - Agra, Santiago
AU - Brenlla, Julio
AU - Martínez, Silvia
AU - Rivero, Olga
AU - Collier, David A
AU - Palotie, Aarno
AU - Cichon, Sven
AU - Nöthen, Markus M
AU - Rietschel, Marcella
AU - Rujescu, Dan
AU - Stefansson, Hreinn
AU - Steinberg, Stacy
AU - Sigurdsson, Engilbert
AU - St Clair, David
AU - Tosato, Sarah
AU - Werge, Thomas
AU - Stefansson, Kari
AU - González, Jose Carlos
AU - Valero, Joaquín
AU - Gutiérrez-Zotes, Alfonso
AU - Labad, Antonio
AU - Martorell, Lourdes
AU - Vilella, Elisabet
AU - Carracedo, Ángel
AU - Costas, Javier
N1 - Copyright © 2012 Society of Biological Psychiatry. Published by Elsevier Inc. All rights reserved.
PY - 2012/1/15
Y1 - 2012/1/15
N2 - Genome-wide association studies using several hundred thousand anonymous markers present limited statistical power. Alternatively, association studies restricted to common nonsynonymous single nucleotide polymorphisms (nsSNPs) have the advantage of strongly reducing the multiple testing problem, while increasing the probability of testing functional single nucleotide polymorphisms (SNPs). We performed a case-control association study of common nsSNPs in Galician (northwest Spain) samples using the Affymetrix GeneChip Human 20k cSNP Kit, followed by a replication study of the more promising results. After quality control procedures, the discovery sample consisted of 5100 nsSNPs at minor allele frequency >5% analyzed in 476 schizophrenia patients and 447 control subjects. The replication sample consisted of 4069 cases and 15,128 control subjects of European origin. We also performed multilocus analysis, using aggregated scores of nsSNPs at liberal significance thresholds and cross-validation procedures. The 5 independent nsSNPs with false discovery rate q ≤.25, as well as 13 additional nsSNPs at p <.01 and located in functional candidate genes, were genotyped in the replication samples. One SNP, rs13107325, located at the metal ions transporter gene SLC39A8, reached significance in the combined sample after Bonferroni correction (trend test, p = 2.7 × 10 -6, allelic odds ratio = 1.32). This SNP presents minor allele frequency of 5% to 10% in many European populations but is rare outside Europe. We also confirmed the polygenic component of susceptibility. Taking into account that another metal ions transporter gene, SLC39A3, is associated to bipolar disorder, our findings reveal a role for brain metal homeostasis in psychosis.
AB - Genome-wide association studies using several hundred thousand anonymous markers present limited statistical power. Alternatively, association studies restricted to common nonsynonymous single nucleotide polymorphisms (nsSNPs) have the advantage of strongly reducing the multiple testing problem, while increasing the probability of testing functional single nucleotide polymorphisms (SNPs). We performed a case-control association study of common nsSNPs in Galician (northwest Spain) samples using the Affymetrix GeneChip Human 20k cSNP Kit, followed by a replication study of the more promising results. After quality control procedures, the discovery sample consisted of 5100 nsSNPs at minor allele frequency >5% analyzed in 476 schizophrenia patients and 447 control subjects. The replication sample consisted of 4069 cases and 15,128 control subjects of European origin. We also performed multilocus analysis, using aggregated scores of nsSNPs at liberal significance thresholds and cross-validation procedures. The 5 independent nsSNPs with false discovery rate q ≤.25, as well as 13 additional nsSNPs at p <.01 and located in functional candidate genes, were genotyped in the replication samples. One SNP, rs13107325, located at the metal ions transporter gene SLC39A8, reached significance in the combined sample after Bonferroni correction (trend test, p = 2.7 × 10 -6, allelic odds ratio = 1.32). This SNP presents minor allele frequency of 5% to 10% in many European populations but is rare outside Europe. We also confirmed the polygenic component of susceptibility. Taking into account that another metal ions transporter gene, SLC39A3, is associated to bipolar disorder, our findings reveal a role for brain metal homeostasis in psychosis.
U2 - 10.1016/j.biopsych.2011.09.032
DO - 10.1016/j.biopsych.2011.09.032
M3 - Journal article
C2 - 22078303
SN - 0006-3223
VL - 71
SP - 169
EP - 177
JO - Biological Psychiatry
JF - Biological Psychiatry
IS - 2
ER -