A meta-analytic framework for detection of genetic interactions.
A meta-analytic framework for detection of genetic interactions.
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用于检测遗传相互作用的荟萃分析框架。
DOI:
10.1002/gepi.21996
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发表时间:
2016-11
影响因子:
2.1
通讯作者:
Scheet, Paul
中科院分区:
文献类型:
--
作者:
Liu, Yulun;Chen, Yong;Scheet, Paul
With varying, but substantial, proportions of heritability remaining unexplained by summaries of single-SNP genetic variation, there is a demand for methods that extract maximal information from genetic association studies. One source of variation that is difficult to assess is genetic interactions. A major challenge for naive detection methods is the large number of possible combinations, with a requisite need to correct for multiple testing. Assumptions of large marginal effects, to reduce the search space, may be restrictive and miss higher-order interactions with modest marginal effects. In this paper, we propose a new procedure for detecting gene-by-gene interactions through heterogeneity in estimated low-order (e.g. marginal) effect sizes by leveraging population structure, or ancestral differences, among studies in which the same phenotypes were measured. We implement this approach in a meta-analytic framework, which offers numerous advantages, such as robustness and computational efficiency, and is necessary when data-sharing limitations restrict joint analysis. We effectively apply a dimension reduction procedure that scales to allow searches for higher-order interactions. For comparison to our method, which we term phylogen Y-aware Effect-size Tests for Interactions (YETI), we adapt an existing method that assumes interacting loci will exhibit strong marginal effects to our meta-analytic framework. As expected, YETI excels when multiple studies are from highly differentiated populations and maintains its superiority in these conditions even when marginal effects are small. When these conditions are less extreme, the advantage of our method wanes. We assess the Type-I error and power characteristics of complementary approaches to evaluate their strengths and limitations.
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影响因子:
2.1
作者:
Park, Mee Young;Hastie, Trevor
通讯作者:
Hastie, Trevor
DOI:
10.1038/nrg2579
发表时间:
2009-06
期刊:
Nature reviews. Genetics
影响因子:
--
作者:
Cordell HJ
通讯作者:
Cordell HJ
影响因子:
64.8
作者:
通讯作者:
--
影响因子:
4.5
作者:
Evans, David M.;Marchini, Jonathan;Morris, Andrew P.;Cardon, Lon R.
通讯作者:
Cardon, Lon R.
影响因子:
2.7
作者:
Dai, James Y.;Kooperberg, Charles;Prentice, Ross L.
通讯作者:
Prentice, Ross L.