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About this Publication
Title
Interactions Between Genome-Wide Significant Genetic Variants and Circulating Concentrations of 25-Hydroxyvitamin D in Relation to Prostate Cancer Risk in the National Cancer Institute BPC3.
Pubmed ID
28399564 (View this publication on the PubMed website)
Digital Object Identifier
Publication
Am. J. Epidemiol. 2017 Mar 15; Volume 185 (Issue 6): Pages 452-464
Authors

Dimitrakopoulou VI, Travis RC, Shui IM, Mondul A, Albanes D, Virtamo J, Agudo A, Boeing H, Bueno-de-Mesquita HB, Gunter MJ, Johansson M, Khaw KT, Overvad K, Palli D, Trichopoulou A, Giovannucci E, Hunter DJ, Lindström S, Willett W, Gaziano JM, Stampfer M, Berg C, Berndt SI, Black A, Hoover RN, Kraft P, Key TJ, Tsilidis KK

Abstract

Genome-wide association studies (GWAS) have identified over 100 single nucleotide polymorphisms (SNPs) associated with prostate cancer. However, information on the mechanistic basis for some associations is limited. Recent research has been directed towards the potential association of vitamin D concentrations and prostate cancer, but little is known about whether the aforementioned genetic associations are modified by vitamin D. We investigated the associations of 46 GWAS-identified SNPs, circulating concentrations of 25-hydroxyvitamin D (25(OH)D), and prostate cancer (3,811 cases, 511 of whom died from the disease, compared with 2,980 controls-from 5 cohort studies that recruited participants over several periods beginning in the 1980s). We used logistic regression models with data from the National Cancer Institute Breast and Prostate Cancer Cohort Consortium (BPC3) to evaluate interactions on the multiplicative and additive scales. After allowing for multiple testing, none of the SNPs examined was significantly associated with 25(OH)D concentration, and the SNP-prostate cancer associations did not differ by these concentrations. A statistically significant interaction was observed for each of 2 SNPs in the 8q24 region (rs620861 and rs16902094), 25(OH)D concentration, and fatal prostate cancer on both multiplicative and additive scales (P ≤ 0.001). We did not find strong evidence that associations between GWAS-identified SNPs and prostate cancer are modified by circulating concentrations of 25(OH)D. The intriguing interactions between rs620861 and rs16902094, 25(OH)D concentration, and fatal prostate cancer warrant replication.

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