Indirect effect inference and application to GAW20 data.

Indirect effect inference and application to GAW20 data.
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GAW20数据的间接效应推断及应用

DOI:
10.1186/s12863-018-0638-3
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发表时间:
2018-09-17
期刊:
影响因子:
2.9
通讯作者:
Hu YQ
Hu YQ
中科院分区:
生物学3区
文献类型:
--
作者:
Li L;Wang C;Lu T;Lin S;Hu YQ

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Association studies using a single type of omics data have been successful in identifying disease-associated genetic markers, but the underlying mechanisms are unaddressed. To provide a possible explanation of how these genetic factors affect the disease phenotype, integration of multiple omics data is needed. We propose a novel method, LIPID (likelihood inference proposal for indirect estimation), that uses both single nucleotide polymorphism (SNP) and DNA methylation data jointly to analyze the association between a trait and SNPs. The total effect of SNPs is decomposed into direct and indirect effects, where the indirect effects are the focus of our investigation. Simulation studies show that LIPID performs better in various scenarios than existing methods. Application to the GAW20 data also leads to encouraging results, as the genes identified appear to be biologically relevant to the phenotype studied. The proposed LIPID method is shown to be meritorious in extensive simulations and in real-data analyses.
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