Cancer Causes & Control

, Volume 21, Issue 3, pp 331–345

Germline polymorphisms in the one-carbon metabolism pathway and DNA methylation in colorectal cancer

  • Aditi Hazra
  • Charles S. Fuchs
  • Takako Kawasaki
  • Gregory J. Kirkner
  • David J. Hunter
  • Shuji Ogino
Original paper

DOI: 10.1007/s10552-009-9464-2

Cite this article as:
Hazra, A., Fuchs, C.S., Kawasaki, T. et al. Cancer Causes Control (2010) 21: 331. doi:10.1007/s10552-009-9464-2
  • 201 Downloads

Abstract

Dietary intake of one-carbon nutrients (methyl donors) and germline variants in the one-carbon metabolism genes may influence global DNA methylation level and methylation in promoter CpG islands. In this study, we evaluated the relationship between single nucleotide polymorphisms (SNPs) in the one-carbon metabolism pathway and DNA methylation status in colorectal cancer. Utilizing 182 colorectal cancers cases in two prospective cohort studies, we determined the CpG island methylator phenotype (CIMP) status on eight CIMP-specific promoters and measured LINE-1 methylation level that correlates well with genome-wide DNA methylation level. We genotyped 23 nonsynonymous SNPs in the one-carbon metabolism genes using buffy coat DNA. Most of the 23 SNPs in the one-carbon metabolism pathway were not significantly associated with CIMP-high status (≥6/8 methylated promoters). However, the MTHFR 429 Ala/Ala variant (rs1801131) and the TCN2 259 Arg/Arg variant (rs1801198) were associated with CIMP-high status (MTHFR 429 multivariate odds ratio (MV OR) = 7.56; 95% confidence interval (CI), 1.32–43.3; p trend = 0.10; TCN2 259 Arg/Arg variant MV OR = 3.82; 95% CI, 1.02–14.4; p trend = 0.06). The one-carbon metabolism genotypes were not significantly associated with LINE-1 methylation, although there were modest differences in mean LINE-1 methylation levels between certain genotypes. Collectively, these exploratory data provide suggestive evidence for the association of MTHFR429 Ala/Ala and TCN2 259 Arg/Arg and CIMP status in colorectal cancer.

Keywords

SNP One-carbon metabolism Colorectal cancer CIMP DNA methylation 

Abbreviations

BHMT

Betaine–homocysteine methyltransferase

BMI

Body mass index

CI

Confidence interval

CIMP

CpG island methylator phenotype

HPFS

Health Professionals Follow-up Study

LINE-1

Long interspersed nucleotide element-1

MSI

Microsatellite instability

MTHFR

Methylenetetrahydrofolate reductase

MTRR

5-Methyltetrahydrofolate–homocysteine methyltransferase reductase (methionine synthase reductase)

NHS

Nurses’ Health Study

nsSNP

Nonsynonymous single nucleotide polymorphism

OR

Odds ratio

SNP

Single nucleotide polymorphism

TCN2

Transcobalamin 2

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Aditi Hazra
    • 1
    • 2
  • Charles S. Fuchs
    • 2
    • 3
  • Takako Kawasaki
    • 3
  • Gregory J. Kirkner
    • 2
  • David J. Hunter
    • 1
    • 2
  • Shuji Ogino
    • 3
    • 4
  1. 1.Program in Molecular and Genetic Epidemiology, Department of EpidemiologyHarvard School of Public HealthBostonUSA
  2. 2.Channing Laboratory, Department of MedicineBrigham and Women’s Hospital and Harvard Medical SchoolBostonUSA
  3. 3.Department of Medical OncologyDana-Farber Cancer InstituteBostonUSA
  4. 4.Department of PathologyBrigham and Women’s Hospital and Harvard Medical SchoolBostonUSA

Personalised recommendations