Title | Gene-based tests of association. |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | Huang H, Chanda P, Alonso A, Bader JS, Arking DE |
Journal | PLoS Genet |
Volume | 7 |
Issue | 7 |
Pagination | e1002177 |
Date Published | 2011 Jul |
ISSN | 1553-7404 |
Keywords | Computer Simulation, Genetic Predisposition to Disease, Genome-Wide Association Study, Genotype, Humans, Models, Genetic, Phenotype, Polymorphism, Single Nucleotide |
Abstract | Genome-wide association studies (GWAS) are now used routinely to identify SNPs associated with complex human phenotypes. In several cases, multiple variants within a gene contribute independently to disease risk. Here we introduce a novel Gene-Wide Significance (GWiS) test that uses greedy Bayesian model selection to identify the independent effects within a gene, which are combined to generate a stronger statistical signal. Permutation tests provide p-values that correct for the number of independent tests genome-wide and within each genetic locus. When applied to a dataset comprising 2.5 million SNPs in up to 8,000 individuals measured for various electrocardiography (ECG) parameters, this method identifies more validated associations than conventional GWAS approaches. The method also provides, for the first time, systematic assessments of the number of independent effects within a gene and the fraction of disease-associated genes housing multiple independent effects, observed at 35%-50% of loci in our study. This method can be generalized to other study designs, retains power for low-frequency alleles, and provides gene-based p-values that are directly compatible for pathway-based meta-analysis. |
DOI | 10.1371/journal.pgen.1002177 |
Alternate Journal | PLoS Genet |
PubMed ID | 21829371 |
PubMed Central ID | PMC3145613 |
Grant List | HHSN268201100009I / HL / NHLBI NIH HHS / United States R01 HL059367 / HL / NHLBI NIH HHS / United States HHSN268201100007C / HL / NHLBI NIH HHS / United States HHSN268201100011I / HL / NHLBI NIH HHS / United States U01HG004402 / HG / NHGRI NIH HHS / United States HHSN268201100006C / HL / NHLBI NIH HHS / United States R01HL087641 / HL / NHLBI NIH HHS / United States HHSN268201100005I / HL / NHLBI NIH HHS / United States HHSN268201100007I / HL / NHLBI NIH HHS / United States R01 HL087641 / HL / NHLBI NIH HHS / United States R01HL086694 / HL / NHLBI NIH HHS / United States HHSN268201100012C / HL / NHLBI NIH HHS / United States UL1RR025005 / RR / NCRR NIH HHS / United States R01HL59367 / HL / NHLBI NIH HHS / United States HHSN268201100010C / HL / NHLBI NIH HHS / United States UL1 RR025005 / RR / NCRR NIH HHS / United States HHSN268201100008C / HL / NHLBI NIH HHS / United States HHSN268201100005G / HL / NHLBI NIH HHS / United States HHSN268201100008I / HL / NHLBI NIH HHS / United States HHSN268201100011C / HL / NHLBI NIH HHS / United States R01 HL086694 / HL / NHLBI NIH HHS / United States HHSN268200625226C / / PHS HHS / United States U01 HG004402 / HG / NHGRI NIH HHS / United States HHSN268201100009C / HL / NHLBI NIH HHS / United States HHSN268201100005C / HL / NHLBI NIH HHS / United States |