title: Quantification of gene-specific methylation of DNMT3B and MTHFR using sequenom EpiTYPER®.
abstract: Among 272 patients undergoing a screening colonoscopy, DNA methylation of DNMT3B and MTHFR, genes encoding enzymes critical to one-carbon metabolism, was quantified in blood leukocytes using Sequenom EpiTYPER®. DNA methylation was quantified in 66 and 28 CpG sites of DNMT3B and MTHFR respectively, and conceptualized using two approaches. First, measures representing average methylation across all CpG sites were created. Second, unsupervised principal component (PC) analysis was used as a pattern derivation and data-reduction approach, to develop two summary variables (PC1 and PC2). These two summary variables represented methylation around the transcription start site (PC1) and in the gene-coding area (PC2) for both DNMT3B and MTHFR. The data contained in this article presents the variation of methylation levels for individual CpG sites within the DNMT3B and MTHFR genes and possible correlations uncovered using PC analysis. The data are related to the research article "Gene-specific DNA methylation of DNMT3B and MTHFR and colorectal adenoma risk" in Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis.
authors.affiliation: Department of Public Health Sciences, Queen's University Kingston, Ontario, Canada K7L3N6.
authors.forename: Vikki
authors.initials: V
authors.lastname: Ho
authors.affiliation: Department of Public Health Sciences, Queen's University Kingston, Ontario, Canada K7L3N6.
authors.forename: Janet E
authors.initials: JE
authors.lastname: Ashbury
authors.affiliation: Department of Medical Genetics, University of Alberta, Edmonton, Alberta, Canada T6G 2R3.
authors.forename: Sherryl
authors.initials: S
authors.lastname: Taylor
authors.affiliation: Gastrointestinal Diseases Research Unit (GIDRU), Queen's University, Kingston, Ontario, Canada K7L3N6.
authors.forename: Stephen
authors.initials: S
authors.lastname: Vanner
authors.affiliation: Department of Public Health Sciences, Queen's University Kingston, Ontario, Canada K7L3N6.
authors.forename: Will D
authors.initials: WD
authors.lastname: King