Association studies for next-generation sequencing.

TitleAssociation studies for next-generation sequencing.
Publication TypeJournal Article
Year of Publication2011
AuthorsLuo, L, Boerwinkle, E, Xiong, M
JournalGenome Res
Date Published2011 Jul
KeywordsAngiopoietin-Like Protein 4, Angiopoietins, Computational Biology, Computer Simulation, Databases, Genetic, Genetic Variation, Genetics, Population, Genome, Human, Genome-Wide Association Study, Genotype, Humans, Models, Biological, Models, Statistical, Multivariate Analysis, Phenotype, Sequence Analysis, DNA

Genome-wide association studies (GWAS) have become the primary approach for identifying genes with common variants influencing complex diseases. Despite considerable progress, the common variations identified by GWAS account for only a small fraction of disease heritability and are unlikely to explain the majority of phenotypic variations of common diseases. A potential source of the missing heritability is the contribution of rare variants. Next-generation sequencing technologies will detect millions of novel rare variants, but these technologies have three defining features: identification of a large number of rare variants, a high proportion of sequence errors, and a large proportion of missing data. These features raise challenges for testing the association of rare variants with phenotypes of interest. In this study, we use a genome continuum model and functional principal components as a general principle for developing novel and powerful association analysis methods designed for resequencing data. We use simulations to calculate the type I error rates and the power of nine alternative statistics: two functional principal component analysis (FPCA)-based statistics, the multivariate principal component analysis (MPCA)-based statistic, the weighted sum (WSS), the variable-threshold (VT) method, the generalized T(2), the collapsing method, the CMC method, and individual tests. We also examined the impact of sequence errors on their type I error rates. Finally, we apply the nine statistics to the published resequencing data set from ANGPTL4 in the Dallas Heart Study. We report that FPCA-based statistics have a higher power to detect association of rare variants and a stronger ability to filter sequence errors than the other seven methods.

Alternate JournalGenome Res
PubMed ID21521787
PubMed Central IDPMC3129252
Grant ListP01 AR052915-01A1 / AR / NIAMS NIH HHS / United States
P50 AR054144 / AR / NIAMS NIH HHS / United States
1R01AR057120-01 / AR / NIAMS NIH HHS / United States
R01 HL106034 / HL / NHLBI NIH HHS / United States
1R01HL106034-01 / HL / NHLBI NIH HHS / United States
R01 AR057120 / AR / NIAMS NIH HHS / United States
P50 AR054144-01 / AR / NIAMS NIH HHS / United States
P01 AR052915 / AR / NIAMS NIH HHS / United States

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