Multilevel-analysis identify a cis-expression quantitative trait locus associated with risk of renal cell carcinoma

Oncotarget
Xiang ShuXifeng Wu

Abstract

We conducted multilevel analyses to identify potential susceptibility loci for renal cell carcinoma (RCC), which may be overlooked in traditional genome-wide association studies (GWAS). A gene set enrichment analysis was performed utilizing a GWAS dataset comprised of 894 RCC cases and 1,516 controls using GenGen, SNP ratio test, and ALIGATOR. The antigen processing and presentation pathway was consistently significant (P = 0.001, = 0.004, and < 0.001, respectively). Versatile gene-based association study approach was applied to the top-ranked pathway and identified the driven genes. By comparing the expression of the genes in RCC tumor and adjacent normal tissues, we observed significant overexpression of HLA genes in tumor tissues, which was also supported by public databases. We sought to validate genetic variants in antigen processing and presentation pathway in an independent GWAS dataset comprised of 1,311 RCC cases and 3,424 control subjects from the National Cancer Institute; one SNP, rs1063355, was significant in both populations (P(meta-analysis) = 9.15 × 10⁻⁴, P(heterogeneity) = 0.427). Strong correlation indicated that rs1063355 was a cis-expression quantitative trait loci which associated with HLA-DQB1 expression (...Continue Reading

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Datasets Mentioned

BETA
GM12878

Methods Mentioned

BETA
MDA
genotyping

Software Mentioned

HaploReg
IMPUTE2
Stata
RegulomeDB
MuTHER
Oncomine
USCS Cancer Browser
VEGAS
EIGENSTRAT

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