Omnibus testing approach for gene-based gene-gene interaction

被引:0
作者
Hebert, Florian [1 ]
Causeur, David [1 ]
Emily, Mathieu [1 ]
机构
[1] Univ Rennes, IRMAR, Inst Agro, Dept Stat & Comp Sci,CNRS, F-35000 Rennes, France
关键词
correlated statistics; gene-gene interaction; genome-wide association studies; omnibus; replication studies; welcome trust case control consortium; HIGHER CRITICISM; MISSING HERITABILITY; STATISTICAL-METHODS; ASSOCIATION; EPISTASIS; ENVIRONMENT; RARE; SET; PERMUTATION; VARIANTS;
D O I
10.1002/sim.9389
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Genetic interaction is considered as one of the main heritable component of complex traits. With the emergence of genome-wide association studies (GWAS), a collection of statistical methods dedicated to the identification of interaction at the SNP level have been proposed. More recently, gene-based gene-gene interaction testing has emerged as an attractive alternative as they confer advantage in both statistical power and biological interpretation. Most of the gene-based interaction methods rely on a multidimensional modeling of the interaction, thus facing a lack of robustness against the huge space of interaction patterns. In this paper, we study a global testing approaches to address the issue of gene-based gene-gene interaction. Based on a logistic regression modeling framework, all SNP-SNP interaction tests are combined to produce a gene-level test for interaction. We propose an omnibus test that takes advantage of (1) the heterogeneity between existing global tests and (2) the complementarity between allele-based and genotype-based coding of SNPs. Through an extensive simulation study, it is demonstrated that the proposed omnibus test has the ability to detect with high power the most common interaction genetic models with one causal pair as well as more complex genetic models where more than one causal pair is involved. On the other hand, the flexibility of the proposed approach is shown to be robust and improves power compared to single global tests in replication studies. Furthermore, the application of our procedure to real datasets confirms the adaptability of our approach to replicate various gene-gene interactions.
引用
收藏
页码:2854 / 2878
页数:25
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