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Association of rs2282679 A>C polymorphism in vitamin D binding protein gene with colorectal cancer risk and survival: effect modification by dietary vitamin D intake.
- Source :
-
BMC cancer [BMC Cancer] 2018 Feb 06; Vol. 18 (1), pp. 155. Date of Electronic Publication: 2018 Feb 06. - Publication Year :
- 2018
-
Abstract
- Background: The rs2282679 A>C polymorphism in the vitamin D binding protein gene is associated with lower circulating levels of vitamin D. We investigated associations of this SNP with colorectal cancer (CRC) risk and survival and whether the associations vary by dietary vitamin D intake and tumor molecular phenotype.<br />Methods: A population-based case-control study identified 637 incident CRC cases (including 489 participants with follow-up data on mortality end-points) and 489 matched controls. Germline DNA samples were genotyped with the Illumina Omni-Quad 1 Million chip in cases and the Affymetrix Axiom® myDesign™ Array in controls. Logistic regression examined the association between the rs2282679 polymorphism and CRC risk with inclusion of potential confounders. Kaplan-Meier curves and multivariable Cox models assessed the polymorphism relative to overall survival (OS) and disease-free survival (DFS).<br />Results: The rs2282679 polymorphism was not associated with overall CRC risk; there was evidence, however, of effect modification by total vitamin D intake (P <subscript>interaction</subscript> = 0.019). Survival analyses showed that the C allele was correlated with poor DFS (per-allele HR, 1.36; 95%CI, 1.05-1.77). The association of rs2282679 on DFS was limited to BRAF wild-type tumors (HR, 1.58; 95%CI, 1.12-2.23). For OS, the C allele was associated with higher all-cause mortality among patients with higher levels of dietary vitamin D (HR, 2.11; 95%CI, 1.29-3.74), calcium (HR, 1.93; 95%CI, 1.08-3.46), milk (HR, 2.36; 95%CI, 1.26-4.44), and total dairy product intakes (HR, 2.03; 95%CI, 1.11-3.72).<br />Conclusion: The rs2282679 SNP was not associated with overall CRC risk, but may be associated with survival after cancer diagnosis. The association of this SNP on survival among CRC patients may differ according to dietary vitamin D and calcium intakes and according to tumor BRAF mutation status.
- Subjects :
- Aged
Case-Control Studies
Diet
Female
Gene Frequency
Genotype
Humans
Kaplan-Meier Estimate
Male
Middle Aged
Risk Factors
Vitamin D administration & dosage
Vitamins administration & dosage
Colorectal Neoplasms genetics
Genetic Predisposition to Disease genetics
Polymorphism, Single Nucleotide
Vitamin D-Binding Protein genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1471-2407
- Volume :
- 18
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- BMC cancer
- Publication Type :
- Academic Journal
- Accession number :
- 29409465
- Full Text :
- https://doi.org/10.1186/s12885-018-4026-1